Answer:
A
Explanation:
The atomic massof an element is defined as (the SUM) of masses of protons and neutrons in an atom
9.
Which is an environmental factor that affects skin color in humans?
O number of genes inherited
O amount of sunlight absorbed
O number of linked genes
O amount of food consumed
Which is an environmental factor that affects skin color in humans?
O number of genes inherited
O amount of sunlight absorbed
O number of linked genes
O amount of food consumed
ANSWER:-AMOUNT OF SUNLIGHT ABSORBED.
Number of gene for color of the skin is same in all the human beings and also it's a genetic factors is there will be any absence of gene due to its deletion AMOUNT OF SUNLIGHT it is variable in variable reasons which is a imp factor for the color in variation in earth. In regions near to the equator have high amount of the light so they have darker skin color then the people near the poles as there is less amount of light .Number of gene inherited is also same for each and every individual for single species for human which is 378 gene loci and if there is any variation in number due to any genetics disorder it would be a genetic factor again.amount of food consumed is different for different people with same color in same region as it only depends on the work which is done by the individual in the society for its existence. though it is a environmental factor bit it didn't effect color of the species.SO ACCORDING TO ABOVE DETAILS WE CAN CONCLUDE (2) AMOUNT OF THE SUNLIGHT IS THE ENVIRONMENTAL FACTOR WHICH IS RESPONSIBLE FOR THE COLOR OF THE SKIN IN HUMANS
In order for natural selection to occur, organisms must (select all that apply) Check All That Apply have variation that can be passed from one generation to the next. have variation that can be passed from one generation to the next. have differential reproductive success. have differential reproductive success. survive longer than another organism. survive longer than another organism. compete for resources. compete for resources. have adaptations to their environment. have adaptations to their environment.
Answer:
have variation that can be passed from one generation to the nextsurvive longer than another organismhave adaptations to their environment. have differential reproductive success.Explanation:
Naturla selection is the survival and reproduction of individuals due to different phenotypes. The naturla selection represents a mechanism of evolution and changes in traits of species.In order for natural selection to occur, organisms must :
have a variation that can be passed from one generation to the next.have differential reproductive success.Natural Selection is a mechanism of evolution that occurs when there is a heritable variation for a trait and individuals with one version of the trait have greater reproductive success than do individuals with a different version of the trait.
In order for natural selection to occur, three conditions must be met:
There must be variation for the particular trait within a population.The variation must be inheritableIndividuals with one version of the trait must produce more offspring than those with a different version of the trait.Thus,
In order for natural selection to occur, organisms must :
have a variation that can be passed from one generation to the next.have differential reproductive success.Learn more:
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What is a disadvantage of using a space-filling model to show a chemical compound?
Answer:
Explanation:
The appropriate answer is 'space filling models do not identify the number and type of bonds'. A space filling model is one type of three dimensional (3D) molecular model used to represent molecules of different chemical compounds. The structure of this type of arrangement shows that, for example, two elements are bonded but it does not show if it is a single, double or triple bond.
Describe how living things are involved in the constant cycling of carbon.
Answer:
plants uses carbon dioxide during photosynthesis. plants use carbon to make carbohydrates and cellulose. animals then eat plants and carbon is passed down. Animals then respire and release carbon dioxide into the atmosphere.
Answer:
Plants uses carbon dioxide during photosynthesis. Plants use carbon to make carbohydrates and cellulose. Animals then eat plants and carbon is passed down. Animals then respire and release carbon dioxide into the atmosphere.
How do the frequencies of the waves compare?
Wave A has a higher frequency because it has a larger amplitude.
Wave A has a lower frequency because it has a longer wavelength.
The waves have the same frequency because they have the same wavelength.
The waves have the same frequency because they have the same amplitude.
Answer:
The waves have the same frequency because they have the same amplitude.
Which of the following BEST completes the analogy?
Answer:
there is nothing under the question.
Explanation:
Answer:
What are the options . comment
The diagram below shows a light ray striking Medium A and Medium B at the same angle. (4 points)
A rectangle labeled Medium A is drawn on the left. A ray of light travels through air and strikes the surface of medium A making an angle of 50 degrees with the vertical. The light ray bends towards the vertical as it travels through Medium A and makes an angle of about 15 degrees with the vertical. A rectangle labeled Medium B is drawn on the right. A ray of light travels through air and strikes the surface of medium B making an angle of 50 degrees with the vertical. The light ray bends towards the vertical as it travels through Medium B and makes an angle of about 25 degrees with the vertical.
Which statement is correct?
The speed of the light ray is the same in air and Medium A.
The speed of the light ray is the same in air and Medium B.
Medium A and Medium B have different densities because light refracts at different angles.
Medium A and Medium B have the same density because the light ray strikes both at the same angle.
Answer:
A the speed of the light ray is the same in air and medium
Can someone please help me!
Answer:
thats the 2 number point okay,plasma contains platelets ,ok
Explain the reciprocal relationship between human society and limiting factors
Answer:
humans try to modify environment factors to suit their needs. Limiting factors can be controlled in a specific area however, we can't control larger area. Like water or energy.
When can exponential growth happen?
O A. When there are limited resources
O B. When the death rate is high
Han
O C. When carrying capacity is reached
O D. When there is no competition
Answer:
D. When there is no competition
Explanation:
If there is no competition in a population, exponential growth can occur.
Without competition, resources are not limited and a population can grow rapidly.
With limited resources, a high death rate, and a reached carrying capacity, population growth is strongly limited and cannot grow at an exponential rate.
So, answer choices A, B, and C are all incorrect.
The correct answer is D. When there is no competition
why is rna a polymer and a macromolecule
Answer:
RNA is a polymer because it is made up of many monomers called nucleotides. Moreover, RNAs can form macromolecules because many RNAs are large molecules (i.e., polynucleotide chains).
Explanation:
Ribonucleic acid (RNA) can be defined as a single-stranded nucleic acid polymer of the four nucleotides. In RNA, each nucleotide is composed of a 1-ribose sugar, a 2-phosphate group and 3-one of four types of nitrogenous bases: Adenine (A), Cytosine (C), Guanine (G), and Uracil (U), which are covalently bonded to form polynucleotide chains. There are different types of RNAs such as mRNA, tRNA, rRNA, miRNA, circ-RNAs, lncRNAs, etc. Many of these RNAs form large single-stranded (ss) molecules, i.e., polynucleotide chains. For example, an mRNA sequence may have a length of 5,000 nucleotides (5 kb) or even more, and there are RNA viruses that have more than 20000 nucleotides (20 kb) in length.
1. Identify the taxa labeled A, B, C, and
Din the chart.
A.
B.
C.
D.
Answer:
A.Species
B.Genus
C.Phylum
D.Kingdom
1 Reproduction is an important characteristic of living organisms.Explain
Answer:
Reproduction is one of the most important characteristics of living beings, because -
- The existence of any species is dependent on the reproduction because no living being is immortal.
After death of a being of one generation,the existence of that died being is completed by the newborns of the next generation.
And,the birth of newborns of next generation is only possible by the reproduction.
- The variation and mutation in the biological characteristics is often necessary which is only possible by reproduction through many generations.
- When a living being becomes old, it's become unable to do normal tasks like collection of food, finding shelter etc,at that moment,the newborns of next generation do the necessary jobs.
And as mentioned before,these newborns are only possible due to reproduction.
Which is the difference between an antibiotic and an antiviral?
Answer:
There are no options in this question, the options are as follows:
A. Antibiotics build up immunity, and antivirals increase white blood cells.
B. Antibiotics treat the symptoms, and antivirals destroy the causing organism.
C. Antibiotics are in liquid form, and antivirals are in mist form.
D. Antibiotics treat patients who have Staphylococcus, and antivirals treat patients who have the flu.
The answer is D
Explanation:
Specific drugs are used to curb infection or diseases caused by specific pathogens. An infection can be caused by either bacteria, virus or fungi. Considering their different mechanism of infection, viral infections are treated with the use of ANTIVIRAL DRUGS while bacterial infections are treated with the use of ANTIBIOTICS.
According to this question, staphylococcus is a bacterial genus and hence, patients with staphylococcus can be treated with antibiotics while flu is a viral disease, hence can only be treated with antivirals.
Answer:
A. Antibiotics build up immunity, and antivirals increase white blood cells.
Explanation:
edg
A tube with a membrane covering the bottom is placed in a beaker. The membrane allows water to flow through but not salt or glucose. The tube contains an aqueous solution with 4% salt and 20% glucose and the beaker contains an aqueous solution with 12% salt and 6% glucose. How could you describe the solution in the beaker compared to the solution in the tube
Answer:
The solution in the tube is hypertonic to the solution in the beaker.
Explanation:
To compare the solutions, find the total amount of solutes in both the tube and beaker.
The tube has 4% salt and 20% glucose, so it has 24% solute.
The beaker has 12% salt and 6% glucose, so it has 18% solute.
Since 24 is larger than 18, this means the tube has more solute.
Since the tube has more solute and less water compared to the beaker, it is hypertonic to the beaker.
So, the answer is that the solution in the tube is hypertonic to the solution in the beaker.
Solutions are hypertonic or hypotonic to other solutions according to their solute concentration grade. In the exposed example, the beaker aqueous solution is hypotonic to the tube solution, meaning it is less concentrated.
--------------------
Available data:
The membrane allows water to flow through but not salt or glucoseThe tube contains an aqueous solution with 4% salt and 20% glucoseThe beaker contains an aqueous solution with 12% salt and 6% glucoseWe need to describe and compare solutions.
To do it, first, we will review some theoretical framework.
When talking about solutions in compartison with the cell content, we can classify them as follows,
• HYPERTONIC ⇒ A hypertonic solution has a higher concentration of solute than the cell. This means that in the cell interior, the solute concentration is lower than in the solution itself.
• ISOTONIC ⇒ The solute concentration is the same inside the cell and outside.
• HYPOTONIC ⇒ A hypotonic solution has a lower concentration of solute than the cell. This means that in the cell interior, the solute concentration is higher than in the solution itself.
When a cell is in a hypotonic solution, through osmosis, water moves toward the cell.
Osmosis is the phenomenon that occurs when two dilutions of different concentrations -in this example, the interior of the tube and the beaker- are separated by a semipermeable membrane.
The membrane allows the pass of water but not solute. Hence, water can move from the most diluted side to the less diluted one.
What we need to consider is
• When a cell with semipermeable membrane is placed in a hypotonic solution, water enters the cell.
• When a cell with semipermeable membrane is placed in an isotonic solution, there is no water movement.
• When a cell with semipermeable membrane is placed in a hypertonic solution, water gets out of the cell.
In simple words, in the proposed experiment, glucose and salt -solutes- can not cross the membrane, but water can. The tube represents a cell. So,
The tube has 4% salt and the beaker 12 % saltThe tube has 20% glucose and the beaker 6% glucose.To make the analysis easier, we can add the concentration percentages of glucose and salt at each side of the membrane, and then compare them.
The tube contains an aqueous solution with 24% solute (4% salt + 20% glucose)The beacker contains an aqueous solution with 18% solute (12% salt + 6% glucose)We can see that the concentration of solute is higher in the interior of the tube than in the beaker. This difference suggests that water will move forward to the tube interior.
According to this analysis, we can say that
The tube aqueous solution is hypertonic to the beaker solution → More concentratedThe beaker aqueous solution is hypotonic to the tube solution → Less concentrated---------------------------------------------
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What are the different parts of a microscope?
Answer:
Look at both of the file attachments
Explain how homologous and the fossil records support evolution.
Thanks so much!!!
Answer:
Los fósiles, una prueba de la evolucion. El estudio de los fósiles nos da una idea muy directa de los cambios que sufrieron las especies al transformarse unas en otras; existen muchas series de fósiles de plantas y animales que nos permiten reconstruir cómo se fueron adaptando a las cambiantes
Explanation:
Answer:
homologous: have identical position, value, or structure
Fossils: In the oldest rocks area unit fossils of the best organisms and within the newest rocks area unit fossils of additional advanced organisms.
Explanation:
The evolution theory is supported by multiple sorts of evidence: homologous structures show common ancestry, whereas similar selective pressure will manufacture similar variations. analogous structures (beneficial features).
In the oldest rocks area unit fossils of the best organisms and within the newest rocks area unit fossils of additional advanced organisms. This supports Darwin's organic process theory, whereby straightforward life forms {progressively|increasingly|more and additional} evolved into more advanced. Proof of adolescence forms comes from fossils.
which of the following statement about carbon dixoide is not true?
a.) increased carbon dioxide in the atmosphere increases the green house effect
b.) carbon dioxide is a greenhouse gas
c.) atmospheric carbon dioxide levels have slowly declined over the last 50 years
d.) burning fossil fuels can increase carbon dioxide levels in the atmosphere
Answer:
c is not true
Explanation:
c is correct answer because carbon dioxide have been increased not decreased
What are the effects of global warming on the earth over time?
What is nitrogen fixation?List all the ways in which nitrogen fixation takes place in nature.
Answer:
Hey mate.....
Explanation:
This is ur answer.....
Some forms of bacteria can convert atmospheric nitrogen into usable forms such as nitrates and nitrites. Such nitrogen fixing bacteria are commonly found in the roots of leguminous plants. These usable forms of nitrogen are absorbed by plants to produce many compounds such as amino acids, which in turn form proteins.
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If your body lacks enzymes that break down carbohydrates, it would be unable to get __A__ for energy production. If you lacked the enzyme to digest proteins, you may not absorb enough __B__.
Answer:
Glucose and amino acid.
Explanation:
If your body lacks enzymes that break down carbohydrates, it would be unable to get glucose for energy production while on the other hand, if you lacked the enzyme to digest proteins, you may not absorb enough amino acid that our body needs for the formation of muscles. Enzymes play a great role in the breakdown of macro food particles into simpler molecules so that it can be absorbed by the cells.
Answer:
A: Sugar Molecules
B: Amino Acids
Hope this helps!
Explanation:
Which of the following is a way of storing carbon in organic material?
A. Consumption
B. Respiration
C. Burning fossil fuels
D. All of these
The ways of sorting carbon in organic material is consumption, respiration, and fuel burning. The correct option is D.
What is organic material?Organic matter, also known as organic material or natural organic matter, is a massive source of carbon-based compounds detected in natural and engineered, terrestrial and aquatic environments.
There can be several ways to store carbon including consumption, respiration, and burning fossil fuel, etc.
Carbohydrates, lipids, proteins, and nucleic acids are the four primary types of organic compound present in all living things.
Organic compounds are crucial because carbon is found in all living organisms. They are the essential parts of many of the Earth's cycles.
The carbon cycle, for example, encompasses the exchange of carbon between plants and animals during photosynthesis and cellular respiration.
Thus, the correct option is D.
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What goes on during interphase?
Explanation:
During interphase, the cell grows (G1), replicates its DNA (S) and prepares for mitosis (G2). ... Interphase is the 'daily living' or metabolic phase of the cell, in which the cell obtains nutrients and metabolizes them, grows, replicates its DNA in preparation for mitosis, and conducts other "normal" cell functions.
Why does climate change affect so many things?
Answer:
These have been caused by many natural factors, including changes in the sun, emissions from volcanoes, variations in Earth's orbit and levels of carbon dioxide (CO2). Global climate change has typically occurred very slowly, over thousands or millions of years.
Explanation:
According to me there are several causes of climate change, but all the problems are based upon a major problem which is over population. Either it is deforestation, any kind of pollution, global warming or whatever it is, all these problems are inter-linked and all are due to increasing population.
the energy to turn raw materials into food is powered by _____ and occurs in the plants ____
Answer:
Photosynthesis, chloroplast
Explanation:
During a recent hurricane, 25 individuals of the same butterfly species were blown onto a barrier island in southern Florida. Prior to this event, this species did not inhabit the island, but with the ample vegetation on the island and a lack of predators, the displaced individuals were able to survive and reproduce. When the butterflies initially arrived on the island, they did not have to compete for food or space. What type of population growth did they likely exhibit
Answer: Exponential
Explanation:
The main requirement for the population of a species to grow is food. When there is food, a organisms that are born will be able to live longer because food will be able to sustain them.
This is what happened with humans during the Neolithic Revolution when we began farming.
The general trend is that the more food that is available, the higher the population growth. When these butterflies arrived and found no competition for food, their population would increase in the highest way possible which is exponentially because there would be plenty of food to go around.
Answer:
Exponential growth
Explanation:
Without any competition for food or space, the butterfly species likely experienced exponential growth.
The lack of competition would have allowed the population to flourish, as they would have excess amounts of resources, food, space, and other limiting factors.
So, they most likely exhibited exponential growth.
Which of the following is an example of an adaptation?
A. Ducks swim near the shore by a picnic area, where food is always available.
B. A dog walks without pulling on its leash.
C. Wolves work together to catch prey.
D. Birds living near a highway learn not to fly away every time a car passes.
(Zoom the picture for better quality)
Answer:
wolves work together to catch prey
How many carbons are found in a glucose molecule?
Answer:
there are six carbon atoms
Answer:
there are six carbon atoms
A scientist observes rock masses that have moved past each other in opposite horizontal directions. Which feature does the scientist observe?
plateau
syncline
strike-slip fault
fault-block mountai
Answer:
Strike slip fault
Explanation:
when it masses moved away against horizontal directions.
Neurons are best described as:
Answer:
neutral?
Explanation:
