Charles Lyell's principle that the age of earth may be much older than once thought impressed upon Darwin.
Explanation:
Charles Lyell is one among the earlier thinkers whose studies influenced Darwin and he lived in the 1797-1875 period. while on his voyage in Beagle Darwin took the book of Charles Lyell, Principles of Geology with him.
In this book Lyell argues that the earth's surface was formed as a result of gradual geological processes indicating that the earth was much older than what many believed at that time.
Read the statement:
When Mendel crossed a purple-flowered pea plant with a white-flowered pea plant, the offspring were always X. When Mendel crossed the offspring with each other, the distribution was about Y purple and Z white. The more experiments Mendel did with pea plants, the closer they approached these percentages.
Which option correctly replaces X, Y, and Z in the statement?
a. X: purple
Y: 25%
Z: 75%
b. X: white
Y: 25%
Z: 75%
c. X: white
Y: 75%
Z: 25%
d. X: purple
Y: 75%
Z: 25%
Answer:
X: purple
Y: 75%
Z: 25%
Explanation: Hope this helps!
The correct option is b: X:white Y: 25% Z:75%
Let's analyze the statement step by step:
"When Mendel crossed a purple-flowered pea plant with a white-flowered pea plant, the offspring were always X." - This suggests that the trait expressed in the offspring is consistent and always of a particular color. So, X is the color of the offspring."When Mendel crossed the offspring with each other, the distribution was about Y purple and Z white." - This indicates the ratio of purple to white in the second generation. Y and Z represent the percentages of purple and white, respectively."The more experiments Mendel did with pea plants, the closer they approached these percentages." - This implies that through repeated experiments, Mendel observed a consistent trend in the distribution approaching the mentioned percentages.Now, let's match the options:
a. X: purple, Y: 25%, Z: 75% - This does not match the consistent color mentioned in the first part of the statement.b. X: white, Y: 25%, Z: 75% - This matches the consistent color mentioned in the first part of the statement.c. X: white, Y: 75%, Z: 25% - This does not match the consistent color mentioned in the first part of the statement.d. X: purple, Y: 75%, Z: 25% - This does not match the consistent color mentioned in the first part of the statement.Therefore, the correct option is b.
What is responsible for gene regulation?
Answer:
Gene expression is primarily controlled at the level of transcription, largely as a result of binding of proteins to specific sites on DNA. ... The regulator gene codes for synthesis of a repressor molecule that binds to the operator and blocks RNA polymerase from transcribing the structural genes.
In fruit flies, one genotype for red eyes is written XRXR. The R stands for the dominant allele for red eyes. What does the X stand for? the recessive allele for white eyes the female chromosome the codominant allele for pink eyes the male chromosome
Answer:
The correct answer is : the female chromosome
Explanation:
According to the question, it is mentioned that R is a dominant allele, responsible for the red eyes.RR is a genotype for Red eyes.A fruitfly has a diploid genotype which means each trait is represented by a pair of chromosomes.In the above question, the dominant red eye colour trait is represented by the pair of chromosomes RR.Therefore, XX must represent another trait. By convention, a pair of X chromosomes (XX) represent a female and a combination of X and Y chromosomes (XY) represents a male.Given XX genotype represent a female fruitfly chromosome.Answer:
the female chromosome
Explanation:
gradpoint
if we accept genetically modified foods in our homes and use other drugs that affect out performance in life, how is using steroids or testosterone any different
Answer:
Genetically modified foods and other drugs are approved by scientists and organizations such as FDA before including them in the market. They interact with our biochemical system but still do not have adverse effects like steroids or testosterone might have.
Anabolic steroids can perform many permanent side effects like damage to the gonads or other types of liver diseases. Considering the adverse effects these steroids can cause, it is not advised to use them at homes.
how do birds of paradise (the bird NOT the flower) vary between and across species? How does the variation enable the species to survive and reproduce?
Difference between species of birds of Paradise
Explanation:
Birds of Paradise are Tropical type exotic birds that exist around 41 species in New guinea.Their diet depends on the place they live and the surrounding circumstances. Some eat berries and fruits and others eat spiders and worms.Birds of Paradise are sexually dimorphic.Males are colorful and big whereas females are neutral color like brown.The long tail is the most striking feature of Paradise- whydah One of the subspecies bird of Paradise can reach a height of up to 5 inches.The tail and back of Wilson bird of Paradise are mostly surreal-looking.The head of the King subspecies bird of Paradise looks like crimson helmets. Reproductive rates vary for different species male birds build large,elaborate and display for females, perform acrobatic dances or sings long and complicated songs. After choosing the mate it will start to lay one or three eggs depending on the species after reproduction.In the family tree below, people with the recessive trait of attached earlobes are shaded gray
In the family tree below, people with the recessive trait of attached earlobes are shaded gray.
What must be true about the person labeled "A"?
A. It is a male with at least one dominant allele.
B. It is a male with two dominant alleles.
C. It is a female with at least one dominant allele.
D. It is a female with two dominant alleles.
Answer:Its a male with atleast one dominant allele.
Option A.
Explanation:The gene for the attached earlobe is recessive while the gene for the free earlobes is dominant. In the phylogenetic tree, we can see that both the father and mother aren't having attached earlobes. So both of them are having atleast one dominant allele which makes them have free earlobe.
In the F1 offsprings, one of the female and a male is having free earlobes. So both of them have atleast one dominant allele. The 2nd female is having an attached earlobe. So both the recessive allele have come form one parent each. So both of them are heterozygous.
Thus, the male marked as A atleast have one dominant allele. He can be a homozygous dominant, but the probability is 25%.
which behavior is considered a courteous way to deal with a client
Answer: Several behaviors can be considered as cuts when dealing with a client.
Explanation:
Human beings are social beings, we like to interact with each other, but often these interactions do not always occur in the right way. There are several jobs where people have to have an approach with the client and treat them in the best way, which is part of providing a good service.
Various behaviors are considered as cuts when dealing with a client, one of them is being efficient and friendly. When a client enters the person must show a friendly attitude, which allows the client to express what they need. Efficiency must also be shown at the time of performing the work since a person who is occupying a job is because he is capable of performing the work.
Another behavior that can be considered as cuts when dealing with a client is to listen actively. Many people make the mistake of not actively listening to their customers, which can often cause problems when providing a product or service, or simply listen to the customer's complaints. It is important to make the client feel that he is heard, that what he has to say is important.
Keeping calm in any situation is also a way of being courteous to the client. Each person is different, so not all of them will have the same mood at that time. It is important to remain calm and be professional when dealing with a client. It is not correct to respond inappropriately if the client does so, professionalism must be above all. If a client behaves in a certain way, reporting it might be a good idea, but not reaching the point of using the same tone or way of acting that the client used at the time.
Precipitation is less likely to occur under
Precipitation occurs because of the water present in the atmosphere.It occurs when the water droplets fall from the sky out of the air saturated with water vapor.
Explanation:
Various forms of perception are rainfall,snow, sleet, ice pellets dew, frost, and hail.
Precipitation is less likely to occur because of
Less moisture in the atmosphere.Downward movement of the air in the atmosphere Increase in carbon dioxide and other green house gases.Human induced changes like deforestation,overgrazing are some other causes of low rainfall
Describe Dmitri Ivanovski’sExperiment
Explanation:
Using a filtering method for the isolation of bacteria, Ivanovsky discovered that filtered sap from diseased plants could transfer the infection to healthy plants. Further researches led Ivanovsky to conclude that the causal agent was an exceedingly small parasitic microorganism that was invisible even under great magnification and that could permeate porcelain filters designed to trap ordinary bacteria.
Final answer:
Dmitri Ivanovski's experiment in 1892 crucially demonstrated that the infectious agent causing tobacco mosaic disease could pass through filters that trapped bacteria, leading to the foundation of virology and the subsequent identification of viruses.
Explanation:
The experiment conducted by Dmitri Ivanovski in 1892 marks a significant milestone in the field of virology. In his groundbreaking experiment, Ivanovski worked on the tobacco mosaic disease, previously believed to be caused by bacteria. He observed that the infectious agent could pass through a porcelain filter designed to trap bacteria. To his surprise, when he applied the filtered sap to healthy tobacco plants, they too became infected. This led Ivanovski to conclude that the agent causing the disease was smaller than bacteria and not visible under the microscope. His work laid the foundation for the discovery of viruses, although he did not identify the infectious agent as a non-living particle, which is how viruses are now classified.
an organism had 8 chromosomes in its body cells. how many chromosomes will be in the body cells of the offspring?
Answer:
8
Explanation:
I am assuming that this organism reproduces sexually. The body cell of the offspring will be the same as the parent. The reproductive cell of the organism will have half the amount of chromosomes as the body cell.
So if the parent has 8 chromosomes in its body cells then the offspring will have 8 chromosomes in its body cells.
If an organism's muscle cells have 32 chromosomes, its gametes will contain 16 chromosomes, which is half the chromosomal number of diploid cells.
Explanation:Each cell of an organism contains a specific number of chromosomes. In this case, if the organism has 8 chromosomes in its body cells, then the offspring will also have 8 chromosomes in its body cells. This is because the offspring receives half of its chromosomes from each parent during the process of sexual reproduction. Therefore, the number of chromosomes remains the same in the offspring.
The number of chromosomes in the body cells of an organism's offspring is generally the same as that of the parents. This is because, during sexual reproduction, each parent contributes half of the necessary chromosomes through gametes (sperm and egg), which are specialized cells for sexual reproduction. If an organism has 8 chromosomes in its somatic (body) cells, then it is referred to as a diploid organism, and its gametes would be haploid with half the number of chromosomes. Since muscle cells and other somatic cells are diploid, the gametes of an organism that has 32 chromosomes in its muscle cells would have 16 chromosomes.
A scientist used radiation to change the mutation rates of a population of bugs. He then measured how many generations it took for bugs with different mutation rates to adapt to a new background by natural selection. On the graph below, the x-axis represents the mutation rate, and the y-axis represents the number of generations it took for the bugs to reach an average fitness of 90%.
Using evidence from the graph explain how adaptation occurred more quickly as the mutation rate increased.
For this experiment, artificial selection is made by the scientists where traits of benefit are made to be present in the gene by high mutation rate so that the adaptability increases.
Explanation:
Natural selection is a process by which a organism with beneficial traits survive and reproduce in large numbers. They adapt to the environment very quickly and pass on these traits to its progeny which are at the better survival zone.
The mutations for the beneficial traits in certain genes caused the bugs to adapt to their environment well. When mated, they pass on the traits in every generation. It is also said that those organisms who did not get mutated eventually died.
The faster the mutation rate, the faster the mutated bugs with beneficial traits will appear in each generation.
From the graph it can be said that those bugs who could not bear the mutation they died and hence did not appear in the next generation only those bugs who could cope up the environment survived.
Answer:
B. Adaptation occurred more quickly as the mutation rate increased. However, this effect was relatively small for mutation rates above 1%.
Explanation:
Explanation: Quicker adaptation is indicated by fewer generations needed to reach a certain average fitness. The bugs with a 0.1% mutation rate took over 500 generations to adapt, while the bugs with a 10% mutation rate only took about 50 generations to adapt. In general, greater mutation rates correspond to quicker adaptation. However, there is a relatively small difference between a 1% mutation rate and a 10% mutation rate, and no measurable difference at all between 6% and 10%.
A theoretical protein, blue2, is coded for by the blu2 gene. This protein codes for a blue pigment used by the organism to protect it from damaging UV rays from sunlight. The enzyme alterase binding to the blu2 operator halts transcription of blue2. A blu2 operator mutation causes a conformational change that does not allow alterase to bind to operator.
What kind of gene regulation of blue2 is being used?
Positive
Negative
Secondary
Splicing
Negative regulation
Explanation:
The enzymes involved are:
blue 2 protein
enzyme alterase binds to blue 2 operator alters blue 2 transcription.
Mutation in blue 2 operator detest alterase activity.
In negative regulation the alterase ( repressor) binds to the blue gene operator and prevents the transcription of blue gene and hence altering the blue 2 protein production.
After mutation in blue 2 gene operator due to confirmational change alterase does not bind to operator and hence blue 2 gene gets transcribe when transcription factors bind to promoter.
roms
Which energy source contributes the most to climate change?
O
A. Nuclear
B. Hydroelectric
O
O
C. Geothermal
D. Coal
SUBMIT
Answer:
Coal
what else I'm supposed to write
Coal energy source contributes the most to climate change. Hence option D is correct.
What is renewable and non renewable energy sources ?Renewable energy is a energy from a source that is not exhausted or depleted when used. Solar energy or wind energy are examples of the renewable energy source. as wind and solar power is abundantly present everywhere in the environment, it can be exhausted after its over use.
Non-renewable energy comes from sources that will be exhausted or will not be replenished after its use. Fossil fuels: coal, petroleum, and natural gas are the examples of the non renewable energy sources . Coal is the main element in fossil fuels.
In nuclear power plant uranium is the source of the energy and released elements which are not responsible for climate change.
In hydrothermal plant, water is flown against the turbine, as turbine moves, shaft of the generator moves which causes generation of the electricity, it releases no by products in the climate, just kinetic energy of the water is converted into electric energy. it is ecofriendly.
Geothermal energy is extracted from the earth lava, which is also environmental friendly.
But while combustion of coal or any petroleum gas, there is a release of carbon dioxide, carbon mono oxides and other hazardous gaseous in the environment. which causes climate change and global temperature.
Hence option D is correct.
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Which parts of the plants do they show? (A,B,C,D)
And 21.question please
Answer no 1:
The part labelled A is the upper epidermis . The main function of the epidermis is to protect the structure of the leaf.
The part labelled B is palisade tissues. These are the sites where the chlorophyll are present.
The part labelled C are the air spaces in the spongy mesophyll tissue. They allow carbon dioxide to move freely.
The part labelled D are the vascular tissues which transport water and food.
Answer No 20:
The correct option is B) Most of the carbohydrates are made in the palisade mesophyll.
The palisade mesophyll comprises of chloroplast which are the sites where photosynthesis takes place. Hence, these will be the sites where carbohydrates will be manufactured.
Answer No 21)
The correct option is A) upper epidermis
As upper epidermis is the first layer of leaf, sunlight will enter through it and be trapped by the chlorophyll present in the palisade mesophyll cells.
The plants show A. Cuticle B. parasite cells C. interacellular space
D. vascular bundle.
Cuticle:
The cuticle is a waxy, protective layer covering the epidermis of leaves, stems, and other aerial plant organs.
It helps reduce water loss by forming a barrier to evaporation and protecting against environmental stress.
Vascular Bundle:
A vascular bundle is a strand of vascular tissues (xylem and phloem) present in various parts of the plant, responsible for the transportation of water, minerals, sugars, and other nutrients throughout the plant.
Parasitic Cells:
Parasitic cells are cells in certain plants that have a parasitic relationship with the host plant, meaning they derive nutrients and resources from the host plant to sustain themselves.
Intracellular Space:
Intracellular space refers to the spaces or compartments within plant cells where various cellular activities, interactions, and transport processes occur.
This space is within the cell membrane and includes the cytoplasm, organelles, and other cellular components.
These elements play critical roles in the structure, function, and adaptation of plants.
The cuticle helps plants adapt to their environment, vascular bundles ensure nutrient transport, parasitic cells demonstrate varied plant relationships, and intracellular spaces are fundamental for cellular activities.
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For C.E.R.
Is meiosis just a longer process of mitosis ?
Answer:
yes! Meiosis has a longer chain than mitosis.
Explanation:
Answer:
Meiosis does have a longer chain than mitosis.
Explanation
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In science, what are the characteristics of a stable society?
Answer:
Stable society means when the population in the society is in equilibrium and the people are at peace and calm with each other and thus they accept their position in the society is called as stable society.
Explanation:
Stability is important to build up a strong society.Adequate socialization,social integration is important and are the necessity for building a stable society.Social institution perform function to ensure stability in a society.The population in the society should be in a stable condition.what gas is used by plants during photosynthesis, where does it come from, and where does it enter the plant?
Answer:
oxygen
Explanation:
because it are the chimacles in the oxygen
11) What is the important outcome of meiosis I?
The important outcome of meiosis I is the reduction of the chromosome number by half.
This reduction is achieved through two key processes:
Homologous Chromosome Separation: During meiosis I, homologous chromosomes (chromosomes that carry the same genes but may have different alleles) are separated into different daughter cells. This ensures that each daughter cell receives one member of each homologous chromosome pair.
Independent Assortment: The specific combination of homologous chromosomes that segregate into each daughter cell is random due to a process called independent assortment. This results in genetic diversity among the daughter cells.
By reducing the chromosome number and creating genetically unique daughter cells, meiosis I plays a crucial role in sexual reproduction. It ensures that when two gametes (sperm and egg) fuse during fertilization, the resulting zygote has the correct diploid chromosome number and a diverse combination of genetic information from both parents.
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What is the term that scientists use when comparing the properties of solids, liquids and gases?
The term scientists use when comparing the properties of solids, liquids, and gases is States of Matter. These states are characterized by different properties such as shape and volume, and molecule behavior.
Explanation:The term scientists use when comparing the properties of solids, liquids and gases is called States of Matter. These three states are the most common and are characterized by different properties. Solids have a definite shape and volume, liquids only have a definite volume, and gases have no definite shape or volume. Their molecules behave differently, which accounts for their different physical properties. For example, in a solid, the molecules are tightly packed together and vibrate around a fixed point, while in a gas, the molecules have more freedom and move around at high speeds.
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Sociable weavers are a species of bird found in Africa. All males of a colony work together to build a large nest that can house several hundred birds. This is an example of
Answer:
The characteristics of the Sociable weavers of living in colonies and cooperating for the construction of nests is an example of gregariousness, a type of intraspecific relationship.
Explanation:
Intraspecific relationships are those interactions that occur between individuals of the same species, characterized by the influence that each of them has with their similarities.
Gregariousness -as observed in Sociable weavers- is an intraspecific relationship that leads individuals to live in communities or colonies, contributing to the care, protection and feeding of their members.
Other gregarious species are bees and ants.
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Sociable weavers are a species of bird found in Africa. All males of a colony work together to build a large nest that can house several hundred birds. This is an example of
✔ cooperation
.
Typically, peregrine falcons hunt medium-sized birds, but they will also eat small mammals, reptiles, and insects. This is an example of
✔ predation
.
Male deer, called bucks, head-butt each other to defend their breeding territory and female mates. This is an example of
✔ competition
.
(b)
Describe how the antibody gene could be isolated from an animal cell and introduced into
a crop plant such as maize.
Answer:
Firstly, we can use a DNA probe to identify the particular antibody gene that we are looking for.
We can cut the gene at specific restriction sites by using specific restriction enzymes.
The same restriction enzymes should be used to cut the DNA from the specific site in the maize plant.
The gene can be introduced and ligated in the maize genome by using DNA ligase.
The recombinant DNA can be places in the Maize cop plant.
What are some enzymes that break down and build up Dna
Answer:
In this answer I will talk about which enzymes break down and accumulate DNA
Explanation:
Enzymes that contain DNA live the name of:
- Polymerase
- Premium
- Helicasa
- Ligasa
- Topoisomerase
What is a recessive gen
Answer:
The gene that can be masked by a dominant gene
Explanation:
To have a trait from a recessive gene you must only have gotten both genes from your parents, for example one may have gotten blue eyes as they got the recessive gene from both their parents.
Answer:
A recessive gene is the type of gene that can be masked by dominated gene.
Explanation:
In order to receive trait like blue eyes you have to get it from both of your parents. These gene has the tendency to withdraw by the dominance of the dominant genes.
ANSWER QUICKLY!!
Which do all plants need?
xylem
seeds
light
phloem
Answer:
light
Explanation:
Not every plant grows from a seed. Some plants, like ferns and mosses, grow from spores.
some more simple plants, such as mosses and algae, do not have xylem or phloem
All plants require light for photosynthesis
Answer:
light
Explanation:
some plants dont have xylem and phloem
they are called non vascular plants
and not all plants needs seeds to grow from
however all plants need light to germinate
An increase number of mitochondria in muscle cells would enable an individual to obtain energy from cellular respiration at a faster rate.True or false and if false why?
Answer:
there is an association between the number of mitochondria in muscle cells and energy production
Explanation:
Mitochondria generate energy by generating adenosine triphosphate (ATP), which is referred to as the "molecular unit of currency" of the cell since this molecule provides energy for diverse cellular processes
Sargon of Akkad was the world's first
A. king
B. general
c. emperor
D. philosopher
Please select the best answer from the choices provided
Final answer:
Sargon of Akkad is best recognized as the world's first (option B) emperor, who established the first empire by conquering and unifying Mesopotamian cities under a single ruler, making significant advancements in the political structure of the time.
Explanation:
Sargon of Akkad is credited with establishing the world's first empire. This occurred around 2300 BCE when he conquered Sumer and the rest of Mesopotamia, thus unifying the region under a single ruler, and making history with this expansive domain controlled by one sovereign authority. He founded the Akkadian Empire, which incorporated all of Mesopotamia and even extended into areas such as Syria and Anatolia. The empire showcased a major advancement in political structure for the era, including the development of the world's first standing army.
Considering the options provided, the best answer is 'C. emperor,' since he was the ruler of an empire—a large territory encompassing numerous states under single control, rather than just a city or specific area which is typically associated with a king or general. Philosophers are thinkers and writers on philosophical subjects and are not known for conquering lands and establishing empires.
would squidward's children still be considered purebreds?
Answer:
no
Explanation:
they would carry a recessive gene from the mother
Answer:
It depends who did he get down with
Explanation:
This is a very weird question why am I answering it lol
which one is the right definition, Magnetic Force
A. A non-contact force that is generated between charged objects.
B. A non-contact force that is generated from moving charges.
C. A force that requires physical contact between objects.
D. A non-contact force that exists between objects with mass.
B. A non-contact force that is generated from moving charges.
Explanation:
Magnetic force is a non -contact forceIt is an attractive force or repulsive force.It acts between two charged particles by virtue of their motion.Materials that exhibit magnetic force of attraction or repulsion are called magnets.Uncharged material that are attracted by magnets are called magnetic material.How did the research presented in the article affect scientists' understanding of the evolution of eukaryotes
Answer:
This answer is in my own words.
The other is from Plato.
Explanation:
Own Words: It first was thought that archaea and eukaryotes were closer than bacteria and eukaryotes. In present day we now have proof that archaea and bacteria helped form complex cells.
Plato answer: It was originally thought that archaea and eukaryotes were more closely related than bacteria and eukaryotes. However, evidence now supports the fact that both archaea and bacteria were responsible for the formation of more complex cells.
which condition(s) below must be met for a population to be in Hardy Weinberg?
1. no random mating occurs
2. natural selection occurring
3. mutation occurs
4. population is large
5. individuals and their genes immigrate and emigrate.
I just don't understand this question. Does it want the 5 requirements or somethings else.
Answer: For a population to be in Hardy Weinberg, option 1, 2 , 4 and 5 are very crucial
Explanation: Hardy Weinberg principle of population (equilibrium) focuses on variation in the gene of an individual, this principle states that allele and genotype frequency in a population will remain constant if there are no disturbing factors like; Natural selection, mutation, non random mating etc.
This means that for a genotype of a population to be maintained there should be no selection of mating individuals, mutation should not occur, there should be random mating, and they should remain in the same environment.. This will ensure that individual produced in next generation looks like their parents.