C) The low income country relies on agriculture for subsistence; the high relies on technology
Explanation:
While all four statements apply equally to a comparison of demographics of poor and rich countries, this statement regarding means of subsistence has no overall effect on fertility rate or its treatment as such.
While access to education would mean better understanding of reproduction and hence availability of healthcare in case of complications.
The means of sustenance in themselves are insignificant for this metric.
Which describes farsightedness? A. The eyeball is too short for light to focus properly. B. Nearby objects are clearer than distant ones. C. The image is focused in front of the retina. D. Faraway objects are blurry and out of focus.
Answer:
Which describes farsightedness?
The eyeball is too short for light to focus properly.
Explanation:
This farsightedness best describes longsightedness which has to do with short eyeball for light to be able to focus properly.
Which of the following must be met for a scientifically valid sample? Subjects are selected:
Check ALL that apply
A. To represent the population
B. Based only on who volunteers
C. From the most conveniently available people
D. At random
Answer:
The correct answer is: A. and D.
Explanation:
In order to scientifically validate a sample, it is necessary that,The entire population under study should be considered to obtain an average or a mean data. If only a part of the population is considered then the result obtained would be a biased one. A biased data will not represent the entire population and so it would be incorrect.The sample choice done must be at random covering all the areas of the population to get the accurate result. This is because random selection lowers the possibility of getting biased.
A scientifically valid sample must be representative of the population, not based on who volunteers or conveniently available people, and should be selected at random. The correct option is A and D.
Explanation:To ensure a scientifically valid sample, subjects should be selected to represent the population, meaning they are a true reflection of the entire population. Selecting subjects based only on who volunteers or from the most conveniently available people may introduce bias into the sample. The best practice for selecting a scientifically valid sample is to choose subjects at random, which means every member of the population has an equal chance of being selected.
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What would happen if diploid organisms reproduce by sexual reproduction without first producing sex cells through meiosis?
If no meiosis takes place chromosome number will be doubled disturbing the genetic make up of the organism.
Explanation:
If no meiosis takes place then the resulting zygote will be of double the number of chromosomes. The genetic makeup will change entirely. The process of meiosis halves the number of chromosomes in haploid cell and maintain the serenity of organism.
The process of meiosis due to crossing over, genetic variation occurs which let the offspring receive favourable alleles to survive in new conditions.
In diploid organisms first the gametes are formed, then fertilization occurs and the diploid cell is formed which gives rise to the organism having diploid cells.
What effect does atmospheric co2 have on ocean acidification?
Answer: Ocean acidification is occurring because excess carbon dioxide (CO2) in the atmosphere is being absorbed at the surface of the ocean at an increasing rate. This excess CO2 results in more hydrogen ions, which increases the acidity of the ocean.
Explanation:
Ocean acidification is occurring because excess carbon dioxide (CO2) in the atmosphere is being absorbed at the surface of the ocean at an increasing rate.
What is ocean acidification?About 30% of the carbon dioxide (CO2) released into the atmosphere is absorbed by the ocean.
The quantity of carbon dioxide absorbed by the ocean also rises as atmospheric Carbon dioxide levels rise as a result of human activities such as burning fossil fuels (e.g., automobile emissions) and altering land use (e.g., deforestation).
The concentration of hydrogen ions increases as a result of a series of chemical reactions that take place when Carbon dioxide is absorbed by saltwater. The effects of this process on the ocean and the marine life that inhabits it are extensive.
Therefore, Ocean acidification is occurring because excess carbon dioxide (CO2) in the atmosphere is being absorbed at the surface of the ocean at an increasing rate.
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Cleavage is chick is called discoidal type,why?
Answer; Explanation:
In chicks, the pattern of cleavage is oftentimes referred to as the discoidal because it is entirely associated with the circular disc found in the blastodisc- the cytoplasm. So when during cleavage process, the cells that arise are known as blastomeres which then collectively form the blastoderm.
Groundwater is polluted by:
Chemical Fertilizers
Automobile exhaust
Fossil Fuel Burining
All of the Above
All of the above.
Explanation:
Ground water is polluted by Chemical fertilizers, Automobile exhaust as well as Fossil fuel burning.
Chemical fertilizers are directly causin ground water pollution. The excess of Chemical fertilizers on the land results in leaching of these chemicals into the ground water during rains.
But the Automobile exhaust and Fossil fuel burning are indirectly causing ground water pollution.
This can best be explained by considering the effects of acid rain on ground water. Acid rain causes harmful elements and certain toxic substance to dissolve in it and leach into the soil reaching the ground water. The Ground water acidification is also a consequence of acid rain.
Acid rains results from the presence of oxides of nitrogen, carbons, sulphur etc. These air pollutants are added to the atmosphere by automobile exhausts and fossil fuel burning.
So, we can conclude that automobile exhaust and fossil fuel burning may not be a direct cause of ground water pollution but they are indirectly responsible for ground water pollution.
Answer:
A. Chemical Fertilizers
Explanation:
Hope it helps.
Which physical property is best measured using only a balance?
O
A. Density
O B. Volume
O C. Mass
O D. Color
SUBMI
Answer:
Which physical property is best measured using only a balance?
C. Mass
Answer:
Explanation:
Mass. Took test.
what units are used in a energy pyramid
The units used in a pyramid of energy are kilojoules (kJ) or, more appropriately, a unit of energy per unit area per unit of time, kilojoules per square metre per year (kJ m-2 year
Explanation:
Answer:
Kilocalories
Explanation:
Just did it on ape!x
Suppose the two possible alleles for the height gene are tall and short. If short is recessive to tall, provide the symbol representation and the phenotype for each of the genotype for this trait.
Phenotype - short , Tall
Genotype - tt (short) , TT or Tt (tall)
Explanation:
In Mendelian Genetics, Dominant traits are represented by capital letters and Recessive traits are represented by small letters.
So if height is the character considered, then the traits would be short and tall.
Tall is the dominant phenotype and short is the recessive phenotype.
The alleles of the gene for height are T and t.
The genotype for Tall trait is TT or Tt.
The genotype for short trait is tt.
Therefore, the symbol representation of phenotype (Tall) is TT or Tt and for phenotype (short) is tt.
Identify the element that humans need to breathe.
Answer:
top right
Explanation:
i took it
What does natural resource management aim at?
Natural resource management aims at _________ management of resources.
Answer:
The correct answer is : Sustainable
Explanation:
Natural resources available on earth are the only source of energy to all living beings.They are of two types, Renewable and Non-renewable.Renewable resources are those that are present in ample amount and can regenerate themselves very quickly and hence do not get exhausted. Eg: Sun, Wind, etc.Non-Renewable resources are those that require a lot of time for their formation and if utilised at a rate which is much higher than its formation rate, can result in its exhaustion. Eg: Fossil fuels, Fresh water from glaciers.Natural Resources need to be utilised economically or in a sustained manner by the present generation to give the nature ample time to regenerate them and to ensure that some resources are retained for the future generations.Answer:
Integrated
Explanation:
1. Where are your genes found?
your alleles
your cytoplasm
your ribosomes
your chromosomes
2. What is the shape of DNA called?
nucleotide
double helix
chromosome
ribonucleic acid
3. What is the relationship between a chromosome and DNA?
Chromosomes are made of DNA.
DNA is made of chromosomes.
DNA manufactures chromosomes.
Chromosomes manufacture DNA.
4. What do parents pass on to their offspring?
genes
double helix
nucleotides
ribosomes
5. What is one job of RNA?
unraveling DNA
manufacturing nucleotides
carrying genetic information
giving shape to chromosomes
Answer:
1. your chromosomes
2. double helix
3. chromosomes are made up of DNA
4. genes
5. carrying genetic information
(just took the test and got 100)
Explanation:
What are the two main sources of energy in the water cycle?
Question 1 options:
gravitational energy and thermal energy
gravitational energy and mechanical energy
hydro energy and gravitational energy
kinetic energy and thermal energy
Answer:
hydro energy and gravitational energy
Explanation:
What equipment should they use to MOST efficiently test the pH of the water and record this data? A) litmus paper and a notebook B) pH probe hooked up to a computer C) pH paper and an excel spreadsheet D) pH probe and a graphing calculator
B) pH probe hooked up to a computer
Answer:
C. pH paper and an excel spreadsheet.
Explanation:
The reason for this is that the pH paper will change colors when it is put in water, and the spreadsheet is great for taking data notes.
As a child, Alex was short for his age. But during his teenage years, his height increased and he surpassed most of his friends. What must have occurred to create this growth spurt?
During his teenage years, Alex likely experienced an adolescent growth spurt, caused by hormonal changes during puberty, leading to a rapid increase in height and muscle development.
Alex's height increase during his teenage years is most likely due to the adolescent growth spurt, which is a period of rapid growth that happens during puberty. In boys, growth in height typically starts to increase early in puberty, spurred by the release of hormones such as testosterone, growth hormones, thyroid hormones, and androgens.
The peak rate of height growth can reach about 10 centimeters per year. This rapid growth period generally lasts for several years, and it's also during this time that muscle development occurs, which can continue even after height growth has ceased.
How many atoms are in one cell
Answer:
The number of atoms in a single cell is equal to 100 trillion or 100000000000000 atoms in 1 cell
Explanation:
The number of atoms in a single cell is equal to 100 trillion or 100000000000000 atoms in 1 cell. Another interesting fact that in the entire human body , the number of cells is also found to nearly equal to 100 trillion.
Hope this help
Have a nice day!!!!!!
Depending on the type of cell and its size, a cell's atom count can change. A normal human cell is thought to have 100 trillion (1014) atoms on average. This contains the atoms of different elements that make up the molecules and structures in the cell, including carbon, hydrogen, oxygen, nitrogen, phosphorus, and many more.
It's crucial to remember that a cell's exact atom count might change depending on the type of cell, its size, and the particular chemicals it contains. The makeup of each cell varies, and various chemicals and elements may be present in different concentrations.
Moreover, as cellular activities including chemical synthesis, breakdown, and energy metabolism take place, the number of atoms in a cell can also alter dynamically.
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Which is a policy designed to reduce water contamination
Answer:
Treatment of industrial effluents through the extraction of pollutants before discharge to the rivers
Explanation:
Water contamination is the addition of undesirable materials into rivers, lakes and other bodies of water. Polluted water is unclean and unsafe to use therefore policies are designed to reduce water contamination that possesses risk to human health.
The term validity refers to how _____.
A. important a discovery is scientifically
B. clever the design of the experiment is
C. well-chosen the independent and dependent variables are
D. likely it is that other experiments will support the same conclusion
Answer:
D is most likely to be right.
Explanation:
the production of haploid(N) gametes is the main purpose of __________.
Answer: Meiosis
Explanation: There two types of cell division: Meiosis and mitosis. Meiosis occurs in sex cells otherwise called gametes. In meiosis, a single cell divides two times to produce four daughter cells with haploid number of chromosomes i.e., half the number of chromosomes in the parent cell.
Jupiter is a larger and more massive planet than Earth. If we could send a chicken to Jupiter, which statement below accurately describes the mass and relative weight of the chicken.
Question 3 options:
The mass and the weight of the chicken would increase.
The weight of the chicken would increase, but there would be no change in mass.
The mass of the chicken would increase, but its weight would decrease.
The mass of the chicken would change, but there would be no change in weight.
Answer:
The correct option is
b.) The weight of the chicken would increase, but there would be no
change in mass.
Explanation:
Jupiter is a larger and more massive planet than Earth.
The gravity of Jupiter is much more than Earth.
The weight of an object on a planet depends on the planet's gravity.
The weight of an object on a planet = (mass of the object) [tex]\times[/tex] (gravity of the planet)
Therefore the mass of an object is the same on any plant irrespective of the gravity of the planet.
Since the gravity of Jupiter is more than that of Earth then the weight of the chicken on Jupiter will be more than the weight of the same chicken on Earth.
Therefore the correct option is
b.) The weight of the chicken would increase, but there would be no
change in mass.
PLEASE HELP ASAP!!!
Two students, Adrian and Samantha, are determining the density of two different objects. Adrian is determine the density of a pencil. He measures the mass of the pencil on a scale. He determines the volume of the pencil by measuring its water displacement in a measuring container. Lastly, he calculates the density. Samantha is working to find the density of a metal cube. She measures the mass of the cube on a scale. To find the volume, Samantha measures the length, width, and height of the cube and then multiplies them together. Lastly, she calculates the density using these measurements. Describe two differences between the two experiments that Adrian and Samantha conducted. A) They both used a scale to weigh the objects and they both were using different objects. B) The experiments used two different objects and found the densities of both of those objects. C) They both were measuring the density of two objects and they both used a scale to weigh the objects. D) They found the volumes by two different methods and determined the densities of two different objects.
Answer:
D
Explanation:
D is the Correct answer, becaus eit is asking what the difference between the to ways they found the density.
Answer:
d
Explanation:
Restriction _________ are used to break DNA into pieces for analysis and comparison.
cutters
enzymes
2.
Gel, an electric source, and a micropipet to load the sample into the gel, are needed to make a DNA ______________.
splice
fingerprint
3.
Scientists use _________ for a crime investigation in order to get sample DNA to replicate millions of times to create enough DNA to evaluate.
PCR
1. Enzymes
2. Fingerprint
3. PCR
Explanation:
1. Restriction enzymes are those enzymes that cuts or cleave the DNA sequence at specific sites called recognition sites. The DNA pieces thus obtained is amplified and used for analysis and comparison. Restriction endonucleases cuts the phosphodiester bond of the DNA strand in the interior and Restriction exonucleases cuts at the ends.
2. DNA Fingerprint is the technique in which the DNA samples are run in the gel which separates the DNA strands based on its size which is then compared to the reference DNA sample. Therefore, DNA fingerprint is used in crime scene investigation. During the process of gel electrophoresis, the sample DNA is loaded into the gel with the help of a micropipette and then allowed to run in the presence of electric current. The DNA strands gets separated based on its size and charge.
3. Polymerase chain reaction (PCR) is the process of amplification of DNA. In crime scene investigation, the DNA sample of the suspect is amplified millions of times to evaluate and compare with the criminal's DNA sample using PCR. In the process of PCR, DNA template, DNA Polymerase enzyme (Taq polymerase), primers are required. Temperature plays an important role in the process of PCR.
Answer:
enzymes
Explanation:
Guinea Pigs can either have black fur (B) or white fur (b) and rough textured coats (R) or smooth textured coats (r).
If a guinea pig who is homozygous for both black fur and smooth texture is crossed with a white guinea pig who is heterozygous for rough texture, what are the expected phenotypic ratios for their offspring?
Group of answer choices: 0/16, 1/16, 8/16, 9/16, 3/16
black rough fur ...
black smooth fur ...
white rough fur ...
white smooth fur ...
Answer:
The answers are explained below:
Black rough fur - [tex]\frac{1}{2}=\frac{8}{16}[/tex].Black smooth fur - [tex]\frac{1}{2}=\frac{8}{16}[/tex].White rough fur - [tex]\frac{0}{16}[/tex].white smooth fur -[tex]\frac{0}{16}[/tex]Explanation:
The genotype of homozygous black fur and smooth texture: BBrr.The gametes produced are : BrThe genotype of white and heterozygous for rough texture: bbRrThe gametes produced are : bR and br.The cross,bR br
Br BbRr Bbrr
(B/R) (B/S)
In the brackets (), B - Black.R - Rough.S -Smooth.The cross can develop two types of offspring, that is, Black and Rough (BbRr) - 1.Black and smooth (Bbrr)- 1.The answers:Black rough fur - [tex]\frac{1}{2}=\frac{8}{16}[/tex].Black smooth fur - [tex]\frac{1}{2}=\frac{8}{16}[/tex].White rough fur - [tex]\frac{0}{16}[/tex].white smooth fur -[tex]\frac{0}{16}[/tex]Please identify
Label A
Label B
Label C
Label D
Answer:
Label A: Nucleus
Nucleus can be described as the organelle in which the DNA is enclosed. The nucleus is found in every eukaryotic cell.
Label B: Vacuole
Vacuole can be described as an organelle which is used to store material such as waste. Hence, vacuole is known to be the storage house of a cell.
Label C: Ribosomes
Ribosomes can be described as structures which are present usually on the rough endoplasmic reticulum. The process of translation occurs in the ribosomes and they are hence known to be the protein manufacturing units if a cell.
Label D: Centrioles
A centriole is a cylindrical organelle which is usually made up of the protein tubulin.
A: Nucleus
B: Lysosome
C:Ribsomes
D: Centrioles
The rate of evaporation depends on four main factors - water body size, heat energy, atmospheric pressure and air movement. Air
movement moving across the top of the water can physically lift water droplets from the surface, increasing evaporation. Based on
this information, you would expect what weather event to cause an ir crease in evaporation over tropical seas?
A)hurricane
B)monsoon
C)tornado
D)tsunami
Based on this information, you would expect what weather event to cause an ir crease in evaporation over tropical seas hurricane.
What causes hurricane?Causes of Hurricanes. Warm water, wet heat air, and mild upper-stage winds are the important thing components to the formation of hurricanes. Hurricanes start while hundreds of heat, wet air from oceans surfaces begins offevolved to upward thrust quickly, and collide with hundreds of cooler air.
As this climate device movements westward throughout the tropics, heat ocean air rises into the storm, forming a place of low stress underneath. This reasons extra air to hurry in. The air then rises and cools, forming clouds and thunderstorms.
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A chromosome has 13% G. What percentage of
A, C, and T does this DNA molecule have?
Answer:
a 37%
c 13%
t 37%
Explanation:
c and g go together so a must have the same as g (13%)
a and t go together so they must have equal amounts
100%-13%-13%=how much is left=74%
split this evenly between a and t
74/2=37
what is the phenotypic ratio that results from a dihybrid cross between two organisms and that are heterozygous for both traits
Answer:
The phenotype ratio predicted for dihybrid cross is 9:3:3:1.
Explanation:
A dihybrid cross tracks two traits. Both parents are heterozygous, and one allele for each trait exhibits complete dominance *. This means that both parents have recessive alleles, but exhibit the dominant phenotype. (Sorry if i Misspelled some words)
Final answer:
The phenotypic ratio from a dihybrid cross between two heterozygous organisms is typically 9:3:3:1, calculated using a Punnett square. This ratio applies when traits are independently assorted and show complete dominance. Deviations can occur with different interactions such as epistasis.
Explanation:
The phenotypic ratio that results from a dihybrid cross between two organisms that are heterozygous for both traits is typically 9:3:3:1. This ratio emerges from crossing individuals with the genotype AaBb x AaBb, where 'A' and 'a' represent the alleles of one gene, and 'B' and 'b' represent the alleles of a second gene. Both traits are independently assorted and show complete dominance.
To calculate the ratio, you would use a Punnett square to predict the genotype of their offspring. The resulting phenotypic ratio is:
9 showing both dominant traits (A-B-)3 showing the first dominant trait and second recessive trait (A-bb)3 showing the first recessive trait and second dominant trait (aaB-)1 showing both recessive traits (aabb)If there are deviations due to different assumptions about the phenotype of allele 'b' or other gene interactions, such as epistasis, the phenotypic ratio could be modified to 9:3:4, 12:3:1, 9:7, or 15:1.
A team of scientists is working to to determine if a meteor created a landform which branches of earth science
Final answer:
The inquiry falls under the subject of Geography within the field of Geology, as scientists aim to determine if a meteor created a landform. Geological investigation is complemented by geographical techniques for explaining and predicting landscape changes.
Explanation:
The question pertains to a team of scientists working to determine if a meteor created a landform, which relates to the field of Geology. Geology is integral to understanding Earth's landforms, including those created by meteors. For instance, scientists employ geology to study the plate tectonics that form Earth's crust and contribute to the creation of various geological structures. Moreover, the history of meteorites, beginning in the late eighteenth century, shows that geologists and astronomers have long been intrigued by the extraterrestrial origins of certain stones that fall to Earth.
Understanding the effects of an asteroid impact, as well as analyzing patterns on Earth's surface and changes in the landscape, require knowledge of spatial science and geography. This includes plotting data on a map to verify clustering phenomena. Therefore, to ascertain whether a meteor has shaped a particular landform, scientists would utilize geological and geographical methods and data analysis.
All of the following actions can be taken to positively impact the ocean and earth except:
Answer:
A. Burning fossil fuels
C. establishing state parks
E. using renewable energy sources
Explanation:
The action that does not have a positive impact is burning fossil fuels, establishing state parks, and using renewable energy sources.
Impact of actions other than ocean & earth:The ocean refers to the continuous body of salt water that covers more than 70 percent of the Earth's surface. The burning of fossil fuels should not be done. The state parks should not be established. Also, the energy sources i.e. renewable should not be used. Due to the above information, it does not have a positive impact.
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What is the impact of exposure to violence on development during middle childhood? How can exposure to violence play a role in bullying? Have you been a victim of bullying or a bully yourself? What is the best way to combat bullying?
Answer:
The exposure of a child with violence have been seen to have a number of negative influences on the child. One of these negative influences is the influence in the adaptability of the child and his academic success. Children who encounter violence are mainly subjected to low academic performance and have difficulty in adapting to schools. The exposure to violence disturbs the cognitive functioning of the child.
Children who are often depressed encounter more bullying from other people. The best way to combat bullying is to ask assistance from a higher authority such as a teacher.