BIOLOGY MIDDLE SCHOOL

Why do you think doctors try to use autografts rather than allografts on
burn patients?

Answers

Answer 1
Answer: Autografts are skin grafts from the own patient, so the skin will not be recognized as a foreign substance, and there is no chance that the body will reject the cells. 
Answer 2
Answer:

Answer:

Autografts are skin from the own patient, so the skin will not be recognized as a foreign substance, and there is no chance that the body will reject the cells.

Explanation:

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A true-breeding plant with yellow seeds is bred with a true-breeding plant with green seeds. What color seeds will the offspring produce where yellow is the dominant seed color?A.
all yellow

B.
all green

C.
three-fourths yellow and one-fourth green

D.
three-fourths green and one-fourth yellow

Answers

Answer:

The correct answer would be A. all yellow.

Let "Y" be the dominant allele and "y" be the recessive allele of the gene responsible for the color of the seeds.

Dominant allele "Y" codes for the yellow color of the seeds when present in homozygous as well as heterozygous condition whereas recessive allele "y" codes for the green color of the seeds only when present in homozygous condition.

Now, the genotype of a true-breeding plant with yellow seeds would be YY and that of a true-breeding plant with green seeds would be yy.

The gametes formed by yellow seed plant would be Y and gametes formed by green seed plant would be y.

The cross will result in the production of offspring each with genotype Yy.

Hence, all the offspring plants would produce yellow seeds as yellow is a dominant character.
A. all yellow

they will look all yellow but all will be heterozygous

How does an attic fox survive harsh winters in the tundra?

Answers

it has a very thick fur coat that keeps it very warm. Arctic foxes change the color of their fur with the seasons. In winter they are white to blend in with the snow, while in the summer they change to brown
Answer[:]

The Arctic Fox is designed to survive during really cold winters. It has a special fur that keeps it warm. They also change their fur color depending on the season. If it's winter, then they turn white, if it's summer they turn brown. This helps them survive because they can catch food easily in the winter, without being spotted.

[:] DustinBR [:]

What is the difference between a cotyledon and the true leaves of flowering plants?

Answers

The real difference between a cotyledon and the true leaves of flowering plants is the fact that a cotyledon is a kind of seed that is being produced by all plants for reproduction while the true leaves of flowering plants are parts of photosynthesis.

Why do fish need the suns energy

Answers

The fish don't need the direct energy from the sun but it does help to provide heat to the water which warms up and this is a very slow process also the fish eat herbivores that eat plants and the plant need the sun energy so photosynthesis can occur and as you move up in the food web or chain the fish will eventually eat something else that ate the plant. 

Ice wedging is brought about by ____.a.

carbonic acid freezing on rocks
b.

water and oxygen reacting

c.

water freezing and thawing

d.

rocks colliding with each other

Answers

Answer:

c. water freezing and thawing

Explanation:

Ice wedging is formed during the coldest days of the year, when we have winter, the water that reach the soil, starts to freeze. The water is a strange molecule, when is cold, and turns into a solid, we can observe that the volume increases, that is reason that the soil can split with an ice wedging.

c. water freezing and thawing

How can pioneer species decrease

Answers

Pioneer species can decrease if other species move it out. If the pioneer species in a forest area is a type of bush, that bush might decrease in number as more species come in.
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