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3 years ago

What do valleys on the surface of a planet or moon suggest about previous land features?

Biology

2 answers:

777dan777 [17]3 years ago

8 0

Answer:

Explanation:

Valleys are created by streams of running water

Ilya [14]3 years ago

6 0

B. The presence of water.

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What is the difference between a mechanical layer and a compositional layer?

xenn [34]

Compositional layers are determined by their components, while mechanical layers are determined by their physical properties.

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3 years ago

Describes another common use for carbohydrates?

qwelly [4]

A common use of carbohydrate is to provide energy for plants, animals and human.

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3 years ago

Explain how the animals and plants of a healthy ecosystem are organized and interact.

posledela

Because they all need one another to survive. flowers need bees to distribute their pollen. and some animals relly on plants for food. and plants relly on the sun to be healthy

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3 years ago

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A man with normal vision marries a color-blind woman. Red-green color blindness is an X- linked recessive disorder. They have a

jeyben [28]

Answer: The probability is 100%.

Explanation: The chromosome X is related to gender. A man carries two different chromosomes (XY) and a woman carries two similar chromosomes (XX). The offspring of a couple will inherited:

If it is a boy, he inherites the chromosome Y from his father and X from his mother;
If it a girl, she inherites X from her father and X from her mother;

In the question, the woman is color-blind, which means she carries the recessive alleles: $X^{d}X^{d}$

The man, on the other hand, is normal, so his X-linked genotype will be: $X^{D}Y$ .

Now, since they have a daughter, she inherited her double X from each of her parents, which means she inherited one $X^{d}$ from her mother and one $X^{D}$ from her father.

So, the daughter's genotype can only be heterozygotic $X^{D}$ $X^{d}$ in other words, the probability is 100%.

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3 years ago

Is there a Genetic Basis for Adapting to Life at High Altitudes? A team of scientists from the United States and China set out t

Oliga [24]

Answer:

Looking at tibetan highlanders who thrive at high altitudes- normally that would make us sick- they have adapted, 60% oxygen- could pose huge health issue (live with 10% less oxygen in blood than us)

Explanation:

Evolutionary adaptations- involve a change in the genetic makeup to help individuals survive in environment. Tibetans have adaptations to let them function at high altitudes

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3 years ago