Describe 2 causes of variation in humans
The two main causes of variation are "mutation" and "genetic recombination".
A mutation is a change in the DNA sequence of an organism. Mutations can result from errors in DNA replication during cell division, exposure to mutagens or a viral infection.
Genetic recombination refers to the rearrangement of DNA sequences by the breakage and rejoining of chromosomes or chromosome segments.
Answer:
The two main causes of variation are mutation and genetic recombination in se.xual reproduction.
Explanation:
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A student mixes various molecules needed for DNA replication. When he adds DNA, replication occurs, but each DNA duplex consists of a normal DNA strand paired with numerous segments of DNA that are a few hundred nucleotides long. What has been left out of the mixture
Answer: DNA Ligase
Explanation:
During DNA replication, both the parental DNA strands are separated and act as templates for the synthesis of new strands. The formation of the new strands occurs in only 5'-3' direction and thus both the strands are synthesized in a different manner. One new strand with the template of 3'-5' direction will be synthesized continuously and is called a leading strand. The other strand with the template of 5'-3' direction will be synthesized discontinuously in the form of DNA fragments. These fragments are called Okazaki fragments and the strand is called a lagging strand. DNA ligase connects these fragments later to form a continuous lagging strand.
Therefore, DNA ligase is required for ligation of Okazaki fragments, and in absence of DNA ligase, the ligation of fragments will not occur and the newly synthesized strand will be discontinuous. However, if DNA ligase is not present in the reaction mixture, then the chances are that not all the newly synthesized DNA strands will be discontinuous. Only the DNA molecule with the lagging strand will be in the form of fragments.
Uranus was originally thought to be the star Sagittarius A*.
True
False
Answer:
I think it's true
Explanation:
I'm so sorry if that's wrong
Fruits grown in hot climates are usually less sweet than those grown in cooler temperatures
Increased respiration in the leaves and stems reduce the sugar content in the fruits of a plant because sugars produced in the leaves are used as an energy source instead of being stored in fruits.
What is fruit?
A fruit is a mature, ripened ovary, along with the contents of the ovary. The ovary is the ovule-bearing reproductive structure in the plant flower.
Cellular respiration is the process wherein nutrients (glucose) are oxidized into carbon dioxide and water with release of lots of energy. The released energy is stored in form of ATP which serves as energy currency for cells. Since high temperatures increase the rate of respiration in the plants, sugars produced in the leaves are used as an energy source instead of being stored in fruits.
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Cross Tt x Tt what is the excepted ratio of tall to short plants?
Here is the answer...hope it helps:)
Describe the structure and the function of the stomach. Be sure to include cells and tissues relating to this organ.
Connective tissues support the tissues of the mucosa and connect it to the muscularis layer.
The blood supply of the submucosa provides nutrients to the wall of the stomach. Nervous tissue in the submucosa monitors the contents of the stomach and controls smooth muscle contraction and secretion of digestive substances.
What is the function of the stomach?The stomach secretes acid and enzymes that digest food. Ridges of muscle tissue called rugae line the stomach.
The stomach muscles contract periodically, churning food to enhance digestion. The pyloric sphincter is a muscular valve that opens to allow food to pass from the stomach to the small intestine.
Thus, this could be the answer.
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What are human sources of excess nutrients (nitrates and phosphates) in streams?
How would you explain Darwin's mechanism for evolution called "natural selection"?
Runoff from a uranium mine stockpile has contaminated the surface water in a location. This might cause health problems among people in the location. Which of these is the best plan to solve this problem? (4 points)
Plant trees around uranium mines to absorb contaminants.
Put fences around uranium mines to check the flow of contaminants.
Wear protective clothing for prevention against harmful effects of radiation.
Collect the runoffs in retention ponds for isolation and recovery of contaminants.
The best best plan to solve the problem of contamination in the surface water is to collect the runoffs in retention ponds for isolation and recovery of contaminants.
What is surface runoff?Surface runoff is an overland flow of excess water (with or without accumulated contaminants) that cannot be absorbed by the ground as infiltration.
According to this question, runoff from a uranium mine stockpile has contaminated the surface water in a location. This might cause health problems among people in that region.
However, one way to curb the problem of contamination in the surface water is to collect the runoffs in retention ponds for isolation and recovery of contaminants.
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Some behaviors such as mating and caring for young are genetically determined in certain species of birds. the presence of these behaviors is most likely due to the fact that
The presence of these behaviours is most likely due to the fact that these behaviours helped birds to survive in the past.
How do birds care for young ones?Bird are the warm blooded vertebrates that has feathers, toothless beaked jaws and has the ability to reproduce their young ones through the laying of eggs.
They take care of their young ones till a certain life stage to ensure their survival.
Therefore, the presence of these behaviours is most likely due to the fact that these behaviours helped birds to survive in the past.
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Can someone check if my answers are correct or wrong? thanks
Answer:
Your answers are correct or at least from the information I know and read super sorry if wrong but everything checks out!
How does the white-tailed deer overpopulation affect the ecosystem
When the body uses nonspecific immune defenses, how is the body defending itself?.
Energy in this ecosystem passes directly from the sun to.
Answer:
Through photosynthesis, certain organisms convert solar energy (sunlight) into chemical energy, which is then used to build carbohydrate molecules. The energy stored in the bonds to hold these molecules together is released when an organism breaks down food. Cells then use this energy to perform work, such as movement.
Explanation:
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How will widespread solar panels to generate electricity help reduce global warming
Answer:
Solar panels fight global warming by producing electricity that keeps us from burning greenhouse gas-producing fossil fuels. They also shade Earth from the sun.
Explanation:
Eating Insects to Feed the World, could mealworms be a more sustainable protein source than beef? Why?
Answer: There is a sustainable alternative to going meat-free, the FAO says: edible insects. Grasshoppers, crickets and mealworms are rich in protein, and contain significantly higher sources of minerals such as iron, zinc, copper, and magnesium than beef.
Explanation:
Why are plants called producers
Answer:
they make there own good which creates energy for them to survive, grow and reproduce
Charles darwin found fossils that looked like ancient versions of living species. From this evidence darwin suggested that earth was.
The fossil that was discovered by Charles Darwin goes a long way to suggest that the earth is older than 6000 years.
Who is Charles Darwin?The man Charles Darwin is the renowned proponent of the theory of evolution. According to this theory, living things all evolved from simple life forms many years ago.
The fossil that was discovered by Charles Darwin goes a long way to suggest that the earth is older than 6000 years.
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conclusion definition
Answer:
Answer
Explanation:
The conclusion is the last paragraph you write. The Barebones of a conclusion; summarize the previous paragraphs you wrote and conclude what you wanted to say for writing those paragraphs.
calcium iron vitamin c and vitamin d in which of these is organic substances
Answer:
vitamin C and vitamin d
Explanation:
because if the digested first only no vitamin it's supply to our body
examples like eggs
The grants witnessed strong selection during droughts in 1977 and 1985. compare the two droughts.select all that apply.select all that apply.in both droughts, large-beaked medium ground finches had the highest survival rates.in both droughts, small-beaked medium ground finches had the highest survival rates.both droughts resulted in changes to food sources that favored the survival of some medium ground finches over others.both droughts events provided strong natural selection on medium ground finch populations.
Both droughts resulted in strong natural selection on medium ground finch populations and both droughts resulted in alteration to available food, which favored the survival of some medium ground finches over others. Thus, the correct option is A and B.
What is natural selection?Natural selection is a natural process in which organisms that are more adapted to their environment survive and reproduce more than those that are not.
Darwin's Finches' beaks were picked for their beneficial adaptations over generations until they all branched off to become new species. These birds have distinct beaks than mainland finches, although being almost identical in every other way.
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Which type of cell transport is used by chloroplasts to make hydrogen (H*) ions move against their concentration gradient?
O A. Exocytosis
O B. Passive transport
O C. Active transport
O D. Diffusion
Answer:
The answer to the question is C
Q2. A student used cubes of potato to investigate the effect of surface area and volume on the rate of osmosis. The diagram shows two of the cubes of potato the student used. lem 2 cm 1 cm 1 cm Cube 1 The surface area to volume ratio of cube 1 is 6:1. Calculate the total surface area of cube 2. (a) 2 cm Cube 2 2 cm
The total surface area of the cube 2 is 24
How to calculate the total surface area of the cube?
The surface area is equal to six times the square of the length of the cube's sides. It is denoted as 6a₂, where an is the cube's side length.
As per formulae of the total surface area of a cube
A = 6a₂
Given a= 2,
A= 6.2.2= 24
Hence the answer is 24.
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In a population of birds, the color of their feathers is controlled by an incompletely dominant gene. Homozygotes of one type are sky blue, homozygotes of the other type are mauve, and heterozygotes are cobalt colored. Population 1 contains 10,000 birds and 6,400 of those 10,000 are sky blue. Population 2 contains 10,000 birds and 900 of those 10,000 are sky blue. Both populations are under Hardy-Weinberg Equilibrium. Determine the HWE frequencies of each color in each population separately.
Answer:
if it contains 10000 than it must be 100373282
Explanation:
How many chromosomes does the human genome contain?.
see the file attached!o(〃＾▽＾〃)o
Which led most directly to the decline of the latin language?
oa. the death of joan of arc
ob. fear of witchcraft
oc. the great schism
o d. interest in poetry
The great schism was what led to the decline of the latin language and is denoted as option C.
What is Great schism?This was characterized by Christianity being divided into two divisions, Roman Catholic and Eastern Orthodox.
This led to the latin language being replaced with others such as Greek etc in this scenario.
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In which biome would you likely find primarily evergreens, such as pine, fir, and spruce?
Lidocaine is an anesthetic that is used to prevent the propagation of action potentials. Which compartment would lidocaine MOST likely target
If+the+atmosphere+is+78%+n2,+why+can't+we+just+get+our+nitrogen+by+breathing?
Nitrogen is present in the environment in abundance but still we cant inhale nitrogen
What is the role of nitrogen in our body?
Nitrogen is physiologically inert. It contributes nothing to the functioning of our bodies. The cells in our body need oxygen to live, not nitrogen. we can find nitrogen in our body in form of nitrogeneous base in nucleotide.
We inhale all gases present in air fills our alveoli, by the process of diffusion, only oxygen in the air is taken into the blood stream while the other gases along with the waste CO2 is exhaled. So you do breathe in nitrogen, but it is exhaled as it is by the body.
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A cross was performed, and the offspring shown
to the right were produced. What is the most likely
genotype for the parents?
OBbee x bbEE
OBbEEx Bbee
OBbEex BbEe
BBEE x bbee
DONE
10 mice with
black fur, black eyes
3 mice with
white fur, black eyes
2 mice with
black fur, red eyes
1 mouse with
white fur, red eyes
Answer: da
Explanation:
Answer:
c
Explanation: