A scientist wants to study mating behaviors in crickets. She hypothesizes that males that win the most male vs male contests mate with the most female. She observes the crickets to obtain data. For each male, she counts the number of male-male fights he wins and the number of females he mates with. What is the independent variable?
Answer:The number of fights is the independent variable.
Explanation:Independent variable in an event is defined as the event that's occurring and its number is fixed from the beginning. Also all the other dependent variable or dependent events are completely dependent on these independent events and their number varies with the change of independent variable.
Here in this event, the independent variable is the number of fights. The number of fights is actually the number of males - 1 and this number of males in a community is fixed. Till the end, the males will fight and the final winner will have the chance to mate with the most number of females. So the number of fights in the community is the independent variable here.
Final answer:
The independent variable in the cricket mating behavior study is the number of fights won by male crickets, while the dependent variable is the number of females they mate with. Replication is achieved by including a large enough sample of crickets.
Explanation:
In the study of mating behavior in crickets, the independent variable is the number of male-male fights a male cricket wins. The dependent variable is the number of females the male cricket mates with. Replication in this experiment constitutes having a sufficient number of male crickets to ensure that the results are not due to chance but rather are representative of the entire population of crickets being studied.
Why groundwater can only be found within a few miles of the earth’s surface?
Answer:
The rock below the earth's surface is bedrock. long-term water level declines caused by ground water pumping, drying up of wells, deterioration of water quality, and increased pumping costs.
The rock below the earth's surface is bedrock. long-term water level declines caused by ground water pumping, drying up of wells, deterioration of water quality, and increased pumping costs.
How far under the surface of the earth is groundwater found?Groundwater may be near the Earth's surface or as deep as 30,000 feet, according to the U.S. Geological Survey (USGS).
Thus, rock below the earth's surface is bedrock.
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Why do think a disposable copy of the DNA code is necessary for protein synthesis
A disposable copy of the DNA, in the form of messenger RNA (mRNA), is required for protein synthesis to transport the genetic code from the DNA in the nucleus to the ribosomes in the cytoplasm for translation into a protein. The mRNA acts as the intermediary between the DNA and protein, encoding the protein based on the DNA instructions. After the protein is formed, the mRNA is degraded, marking its disposability.
Explanation:The necessity of a disposable copy of the DNA code in the form of mRNA for protein synthesis is rooted in the concept of the Central Dogma of Molecular Biology: DNA encodes RNA, and RNA encodes protein. Our cells use this principle to make proteins through a process involving two steps: transcription and translation. In transcription, an mRNA molecule is synthesized using the DNA code as a template. This mRNA carries the genetic information out of the nucleus and into the cytoplasm, where the machinery for protein synthesis is located. This is necessary because the original DNA resides safely in the nucleus.
In the second step, translation, the mRNA is read by a ribosome, and based on the specific sequence of nucleotide codons in the mRNA, appropriate amino acids are linked together in a specific order by tRNA molecules. This forms the protein. When the protein is fully synthesized, the mRNA detaches from the ribosome and is degraded. This way, each mRNA is a temporary, disposable copy of the specific DNA code. This process also supports multicellular organisms' need for mass-production of proteins from a single gene at once, as multiple ribosomes can attach to a single mRNA molecule and build multiple identical proteins concurrently.
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A disposable copy of the DNA code, in the form of messenger RNA (mRNA), is necessary for protein synthesis because it transports genetic instructions, protects the DNA from damage, allows multiple proteins to be synthesized simultaneously, and mitigates the impact of errors.
The process of protein synthesis involves several steps, with the first being transcription. During transcription, a segment of DNA is copied into messenger RNA (mRNA) because mRNA acts as a temporary, disposable copy of the DNA code. The primary role of mRNA is to carry the genetic instructions from the nucleus into the cytoplasm, where ribosomes can read this information to synthesize proteins.Having a disposable copy is essential for the following reasons:
Protection of DNA: DNA remains protected within the nucleus, reducing the risk of damage or mutation caused by external factors in the cytosol.Multiple Proteins: mRNA allows multiple copies of the protein to be made simultaneously as several ribosomes can bind to a single mRNA strand at once, a process known as translation.Error Management: Errors in mRNA are less detrimental than errors in DNA because mRNA is temporary. Any mistakes in mRNA will be short-lived and will not affect the permanent genetic code.Thus, the disposable copy ensures efficient and accurate protein synthesis.
Students used gummy bears to represent cells in the gummy bear osmosis lab. After obtaining an initial mass for each gummy bear, the gummies were soaked for 24 hours in different solutions and then dried and massed. The solutions included: distilled water, tap water, 20% sugar solution, and 40% salt solution. After 24 hours, the percent change of each gummy bear was calculated and is shown below:
Distilled Water: +320%
Tap Water: +200%
40% Salt Solution: -60%
20% Sugar Solution: +85%
Based on the data, which gummy bear was in the salt solution and what was the tonicity of that solution?
A) A; hypotonic
B) D; hypotonic
C) B; hypertonic
D) C; hypertonic
Answer:
they got bigger because they socked up water
Explanation:
NTOOSEN
arbon reservoirs.
come examples?
on
4. Nitrogen gas is more abundant in our atmosphere than
oxygen! However, nitrogen needs to be converted into
different forms to be used by many organisms. Bacteria are
highly involved in this! Describe the role of (A) bacteria
fixing nitrogen as they live symbiotically with some plant
species, (B) nitrifying bacteria, and (C) denitrifying bacteria
in the nitrogen cycle.
-voir
Carbon
Reservoir
rea
Answer:
A) The role of bacteria fixing nitrogen is very important because it fixes atmospheric nitrogen in the roots of plants. For example, Azotobacter is a bacteria which lives in the root of the higher plants. The bacteria fixes nitrogen for the plant and the plant gives habitat and food to the bacteria and hence, both get benefit.
B) Nitrifying bacteria are the bacteria which converts ammonia into nitrates. Examples are Nitrosomonas and Nitrobacter.
C) Denitrifying bacteria is a type of bacteria which converts nitrates into atmospheric nitrogen. Examples are Serratia and Pseudomonas.
why are light and chlorophyll needed for photosynthesis?
Light and chlorophyll are crucial to photosynthesis, enabling plants to convert light energy into chemical energy stored in sugar molecules. Chlorophyll absorbs light, initiating energy transfers and chemical reactions that produce glucose from carbon dioxide and water. This process of photosynthesis also generates oxygen and forms the basis for most life on earth.
Explanation:Light and chlorophyll are essential for photosynthesis, a vital biological process that plants use to convert light energy, mostly from the sun, into chemical energy stored in glucose or other sugar molecules. The chlorophyll, a green pigment present in the cells of leaves, absorbs light energy, particularly wavelengths in the range of 400 to 700 nanometers, referred to as photosynthetically active radiation.
In this process, the absorbed light energy pushes chlorophyll into an excited state enabling the transfer of electrons, with the energy being passed from one chlorophyll molecule to another until it reaches the reaction center of the photosynthetic system. This energy transfer initiates chemical reactions that lead to the synthesis of glucose, coupling carbon dioxide and water.
Photosynthesis not only stores energy but also plays an indispensable role in sustaining life on earth as it provides oxygen for breathing and carbohydrates, the energy source for most organisms. Thus, without light and chlorophyll, the photosynthesis process and consequently, life on earth would be hampered significantly.
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Devise a serial dilution scheme to prepare 1/20, 1/40, and 1/80 dilutions of a disinfectant
To prepare a serial dilution, you start with the stock solution and dilute it step-by-step. For a 1/20 dilution, take 1 part solution and add 19 parts solvent. For a 1/40 dilution, dilute the 1/20 solution further by taking 1 part of the 1/20 dilution and adding 1 part solvent. Similarly, for a 1/80 dilution, take 1 part of the 1/40 dilution and add 1 part solvent.
Explanation:To prepare a serial dilution, you start out with a stock solution (in this case, the disinfectant) and dilute it step by step. To prepare the 1/20 dilution, you take 1 part stock solution and add 19 parts solvent. Then for a 1/40 dilution, you can dilute the 1/20 solution by a further factor of 2: take 1 part of the 1/20 dilution and add 1 part solvent. The same principle applies for the 1/80 dilution: take 1 part of the 1/40 dilution and add 1 part solvent, or you could take 1 part of the original stock solution to 79 parts of solvent.
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What is the name of a long chain of amino acids strung together?
Select one:
O a. Polysaccharide
b. Polypeptide
c. Peptide sandwich
O d. Polymorphism
Check
How does the process of photosynthesis correspond with the flow of matter and energy within an ecosystem
Photosynthesis process corresponding with flow of matter and energy within ecosystem is given below.
Explanation:
Nothing matters without energy. Certain living bodies convert solar energy from the sun into synthetic energy by the process of Photosynthesis which is used to produce carbohydrate molecules.The energy collected in the bonds is used to hold these molecules and it is released when the organism breaks down food particles.This energy is then utilized to perform physical activities. Energy is not reclaimed in an ecosystem instead it is converted from one state of energy to the other.Photosynthesis is the process by which the plants and other photosynthetic organisms make food.
Explanation:
Energy is transferred through an ecosystem by steps that make up food chain or food web. The primary producer of food are plants and some photosynthetic organisms. The food produced by the plants are fed by organisms of higher trophic level. The plants make food by the process of photosynthesis. Photosynthesis requires sunlight as the source of energy.
The solar energy gets converted to chemical energy and is stored in the form of ATP. When the consumers feed on the food they get energy and matter from it. However, only 10% of the energy is being transferred from one organism to another and the rest are lost in metabolic processes.
Which best matches the plant tissue to its function?
Vascular tissue transports materials from the environment into the plant.
Dermal tissue produces and stores the plant’s food until it is needed.
Meristem tissue uses energy from the sun to produce food for the plant.
Ground tissue is the outermost plant tissue that prevents water loss.
Answer:
The best match to plant tissue to its function is "Vascular tissue transports materials from the environment into the plant."
Explanation:
Vascular tissue is a conducting tissue that is formed by more than one cell type. It is mainly composed of xylem and phloem. Xylem transports water and mineral salts from the soil to the plants , while phloem transports nutrients from the leaves to other parts of the plants.Dermal tissue protects the plant from injury and water loss. Meristem tissue are found it parts of the plant that are growing. The ground tissues include parenchyma, collenchyma, and sclerenchyma, function in photosynthesis, storage, regeneration, support, and protection.Answer:
A
Explanation:
hope this helps
Spongebob is known for his big round eyes (R) which is dominant over an oval eye shape (r). If he is heterozygous for his round eye shape and marries a woman with oval eye shape, what type of eyes might the kids have? (Use Punnett Square)
SpongeBob (Rr) and his partner (rr) can have children with either round (Rr) or oval (rr) eyes, with a 50% chance for each eye shape.
If SpongeBob, who has heterozygous round eyes (Rr), marries a woman with oval eye shape (homozygous rr), their children could have either round or oval eyes. To determine the possible genotypes and phenotypes of the offspring, a Punnett Square can be used:
SpongeBob's genotype: Rr (heterozygous round eyes)
Woman's genotype: rr (homozygous oval eyes)
The Punnett Square would look like this:
R (from SpongeBob) r (from SpongeBob)
r (from woman) Rr (round eyes) rr (oval eyes)
r (from woman) Rr (round eyes) rr (oval eyes)
From this Punnett Square, we can see that there is a 50% chance the children will have round eyes (Rr) and a 50% chance they will have oval eyes (rr).
List the parts of the respiratory system, which air passes through
Answer:
The respiratory system starts at the nose and mouth and continues through the airways and the lungs. Air enters the respiratory system through the nose and mouth and passes down the throat (pharynx) and through the voice box, or larynx.
Explanation:
Answer:
The respiratory system starts at the nose and mouth and continues through the airways and the lungs. Air enters the respiratory system through the nose and mouth and passes down the throat (pharynx) and through the voice box, or larynx
What happens in the small intestine?
O
A. Water and nutrients are absorbed.
O
B. Large proteins are broken into smaller proteins.
O
C. Waste material is expelled from the body.
O
D. Salivary amylase breaks down the food.
Answer:
A. Water and nutrients are absorbed.
Explanation:
About 90% of water and nutrients digestion occurs in small intestine. Therefore the answer to thşs question is A.
Answer:
A
Explanation:
Some of the enzymes necessary for carbohydrate digestion are produced by bacteria in the small intestine. To promote digestion, the small intestine carries water from your circulation into your GI tract. Water is absorbed in the small intestine together with other nutrients.
Who studied mitosing cells
Answer:Margulis
She is the one who discovered it
Which is the result of meiosis II
Answer:
The result of meiosis II is the formation of four unique cells, each carrying a new assortment of genes and chromosomes, and each with half the number of original chromosomes.
Explanation:
pls tell me if i got it wrong if i did sorry but glad i helped :)
Answer:
two haploid daughter cells
Explanation:
Fill in the blank:
Lucy, ___, Daka, Bodo
Lucy, Twiggy, Daka, Boko
Explanation:
Twiggy refers to as the blog logistics. Logistics is a process that is used in planning as well as executing that deals with transportation as well as storage of goods .These goods are transported from the origin to that of the consumption point.
The main goal of logistics defines that it meets the requirement of the customer within the given period of time as well as in a cost effective way.FedEx , DHL and UPS are the most known logistics provider.
Heterotrophs obtain chemical energy from ______________.
Answer:
Heterotrophs obtain chemical energy for their survival by eating plants and animals.
Explanation:
The chemical energy that organism need comes from food. They break this food down to obtain energy.Depending on their source of nutrients , they are classified into: Autotrophs and Heterotrophs.Autotrophs use sunlight and photosynthesize to produce their own food. They are often known as producers.Heterotrophs are beings that can't prepare their own food and consume other organisms to obtain energy.They are also called consumers.Examples include: Animals, fungi,etc.Heterotrophs obtain chemical energy from consuming organic molecules, primarily glucose, derived from autotrophs or other heterotrophs, then metabolizing them through cellular respiration to produce ATP.
Heterotrophs obtain chemical energy from organic molecules produced by autotrophs or other heterotrophs. Unlike autotrophs, which can produce their own organic compounds through processes like photosynthesis, heterotrophs rely on consuming organic matter for energy.
The primary source of chemical energy for heterotrophs is typically in the form of glucose, a simple sugar. Glucose is obtained through the consumption of plants, animals, fungi, or bacteria, which serve as food sources. Once ingested, the organic molecules in these food sources are broken down through processes like digestion into simpler compounds such as glucose, which can then be further metabolized to release energy.
Heterotrophs undergo cellular respiration to extract energy from glucose. In cellular respiration, glucose is oxidized in a series of enzymatic reactions, ultimately producing ATP (adenosine triphosphate), the molecule that serves as the primary energy currency in cells.
ATP can then be utilized by the cell to perform various cellular processes, including growth, repair, and movement. Thus, heterotrophs rely on the consumption and breakdown of organic molecules to sustain their energy needs and maintain cellular functions.
QUESTION 50
Cohesion, surface tension, and adhesion are the properties of water molecules that
Answer:
enable capillarity
Explanation:
It is well known that water tends to adhere to the walls of the vessel in which it is contained. This is due to the force of adhesion which is defined as the force of attraction between unlike molecules. Cohesion is defined as the force of attraction between like molecules. In the case of a plant, cohesion of water molecules in the xylem vessels prevents the water column from breaking. The forces of adhesion, surface tension and cohesion are the basis of capillarity,that is, the rise of liquids in capillary tubes.
If a DNA strand has 63 nucleotides, how many codons are in the sequence?
Answer: The number of codons in the sequence is 21.
Explanation: A codon is a triplet of nucleotide which codes for a specific amino acid. Each amino acid has at least one codon that codes for it. Three nucleotide residues is required to form a codon and to code an amino acid. Since there are 63 nucleotides in the sequence, the number of codons present in the sequence is 63 divided by 3. 63/3 = 21
Please help me answer this 5 questions i mark you as brainlist
Answer:
1. Estimated number of cases
2. 1998 ≈ 17,000 and 2003 = 24,000
3. 24,000 - 17,000 =7,000
4. Roughly about 7990
i hope this helps :)
What happens in meiosis during telophase I?
A. Sister chromatids are pulled apart.
B. Four haploid cells form from each parent cell.
C. Two haploid cells are formed.
D. Four tetrads form in the center of the cell.
"Two haploid cells are formed" happens in meiosis during telophase I.
Answer: Option C
Explanation:
The chromosomes are inserted into nuclei during telophase I. The cell now needs to undergo a cytokinesis cycle, which separates the initial cell's cytoplasm into two daughter cells. One set of chromosomes are contained in each daughter cell and called as haploid or half the original cell's overall chromosomes number.
The parent cell has two poles, each with a full haploid set of chromosomes (consisting sister chromatids) when the meiotic process hits Telophase I. A cleavage furrow is formed at this point, splitting the cytoplasm of the cell into a half (cytokinesis). Once the cytoplasm is completely separated, the two originating daughter cells start planning for the second meiotic division.
In telophase I of meiosis, the cell divides its cytoplasm and forms new nuclear membranes around each set of chromosomes, resulting in two haploid daughter cells.
During telophase I of meiosis, the spindle fibers break down, and new nuclear membranes form around each set of chromosomes. This stage concludes with cytokinesis, where the cytoplasm of the cell divides, resulting in two haploid daughter cells. Each of these cells contains a unique combination of chromosomes due to the random assortment of one chromosome from each homologous pair. It is important to note that the sister chromatids are not pulled apart during telophase I; this event occurs later in anaphase II of meiosis II.
Explain how to identify a starting position on a line
Answer:
Sample Response: Pick a reference point on the line to be the zero position. Determine the direction and measure the distance from zero in standard units.
Explanation:
an organisms ability to maintain a stable internal environment in the midst of external environment change is known as
Answer:
an organisms ability to maintain a stable internal environment in the midst of external environment change is known as HOMEOSTASIS
Explanation:
Homeostasis entails regulation of body temperature when there is a need in ambient temperature or internal temperature. Organisms tends to regulate this for survival because every living organism has it required temperature for survival be it internally or externally
An organism's ability to maintain a stable internal environment despite changing external conditions is called homeostasis. This is a crucial aspect of biology because it allows organisms to regulate important functions, helping them survive in a variety of environmental conditions.
Explanation:An organism's ability to maintain a stable internal environment in the face of changing external conditions is referred to as homeostasis. This is a central principle of biology, as it is essential for the survival and functioning of all living things. Homeostasis works through a series of feedback mechanisms that help control and regulate various body systems. Examples include temperature regulation, blood pH balance, and water and electrolyte balance. Without homeostasis, organisms would not be able to adapt to changing environmental conditions and could suffer severe health issues.
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The primary wavelengths of radiation emitted by Earth’s surface
Answer:
The correct answer is longer than those emitted by the sun.
Explanation:
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in a certain species of plant the color purplw (P) is dominant to the color white (p). According to the punnett square what is the probabillity of an offspring being white?
A) 50%
B) 25%
C) 0%
D) 100%
Answer:C) 0%
Explanation: The probability of the an offspring bein white is 0%. A cross between a homozygous purple plant and a homozygous white plant will result in all the offsprings having a genotype of Pp. Purple (P) is dominant over white (p) which is recessive, therefore offsprings with a Pp genotype are heterozygous for purple color and will manifest outwardly as purple plants. Therefore none of the offsprings will be white.
See the attached punnett square for illustration.
Which of the following statements are true? Check
all that apply.
◽️Replication is the process by which a cell
divides.
◽️A copy of DNA is passed on to new offspring.
◽️Replication is the process by which DNA IS
copied.
◽️Replication is the process by which new
offspring are created.
Answer:
A copy of DNA is passed on to new offspring.
Replication is the process by which DNA is copied.
Explanation:
During cell division, the DNA molecule in the parent cell must replicate accurately before the cell divides. The two strands are believed to separate. Each strand becomes a template that specifies the base sequence of a new complementary strand. Through the action of replicating enzymes, free nucleotides come and take up positions along the template strands. Covalent bonds are then formed between the new nucleotides resulting in formation of new DNA strand.
Answer:
A copy of DNA is passed on to new offspring.
Replication is the process by which DNA is copied.
Explanation:
Data for three overlapping populations of frogs are depicted here. A scientists makes the claim that one of the populations has undergone sympatric speciation. Which evidence best supports his argument of speciation for one of the populations?
Answer:
A
Explanation:
I got it wrong and it showed the correct answer
Answer:
A
Explanation:Because it shows what has undergone sympatric speciation
What are abiotic parts of an ecosystem?
Select all that apply.
water
wood
sunlight
insects
meat
mountains
PLEASE HELP
Answer:
they are
sunlight
water
Explanation:
Answer:
water, sunlight, and mountains
Explanation: these things are not derived from living organisms
If you did the experiment again, how could you
improve upon the experimental design? Check all
that apply. V
Increase the number of mice bred.
Examine a different trait within mice.
Examine a trait in another species.
Test patterns for future generations.
Answer:
All are correct
Explanation:
The complete question is
In your experiment, you tested this hypothesis:
Hypothesis: If either parent mouse passes a dominant allele, then the offspring will have black fur.
You confirmed the above in steps 1 through 3, in which you changed the genotypes of the
parents and predicted the fur color, or phenotypes , of the offspring.
In steps 4 and 5, you reversed the process. You were shown the parents and offspring above. You did a (test cross) to identify the genotypes of the parents.
Solution -
The above experimental design can be improvised for obtaining best result in the following ways
a) The sample size is very small, therefore the number of mice breeds must be increased in the experiment
b) If results for one trait are not as per expectations, it would be advisable to look for another trait in the mice.
c) Another thing which can be done is to look for the same trait in another mice species this will allow to remove skewness in experiment.
d) In Darwin's experiment, certain traits appeared after few generations of crossing, the same concept should be applied here and the traits must be looked for in the coming generations.
Hence, all the given options are correct
which of these is an autotroph
Answer:
E. phytoplankton
Explanation:
Phytoplankton, tiny organisms that live in the ocean, are autotrophs.
I hope this helps!
Answer:
E. phytoplankton
Explanation:
Phytoplankton is an autotroph because it produces its own food.
Question 2 (4 points)
Match the appropriate statement with the corresponding term.
Question 2 options:
The metric system unit for mass
An instrument used to measure the mass of an object
An instrument used to measure the weight of an object
The metric system unit for the weight of an object
1.
Scale
2.
Kilogram
3.
Balance
4.
Newton