If Superman gets his powers from earths sun how does he have powers at night?

If a pair of organisms are capable of producing fertile offspring in nature, they must belong to the same A) class B) kingdom C)

jekas [21]

I believe the answer is D) species

3 0

3 years ago

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Whats are the functions of the integumentary system ?

Verdich [7]

Answer:

Absorption

Thousands of pores on the surface of the skin can absorb vitamins, acids, water and oxygen in order to provide moisture and nourishment to our skin.

Excretion

The skin is the body’s largest waste removal system. Toxins are released through the sweat glands and pores.

Secretion

The skin secretes sebum, a mixture of oils that keeps the skin soft and supple. The layer of sebum on the outermost layer of the skin is known as the acid mantle. When intact the acid mantle has a PH that ranges from 4.5-5.5. The acid mantle is acidic in nature to protect the skin from outside invasion.

Regulation

The skin regulates the body’s temperature by sweating; when water from sweat on the skin evaporates it gives off heat and cools the body. The body’s temperature increases or by shivering or getting goosebumps when the body is cold. The contraction of muscles releases energy that warms the body.

Sensation

The skin contains millions of nerve endings that transport stimuli. These nerve endings allow humans to detect sensation such as heat, cold, pain and pressure.

Disclosure: I get a small commissions for purchases made through links in this post.

Sources: Salon fundamentals Esthetics Textbook: The Integumentary System

8 0

3 years ago

Having freckles (F) is dominant over not having freckles (f). A parent with freckles is crossed with a parent without freckles.

Step2247 [10]

Answer:

This is a trick question, and only because the question is vague

Explanation:

Use a Punnet Square to figure out the percentages.

If the parent with freckles (let's just call them Parent A) is homozygous dominant, their genotype would be FF. The parent without freckles (Parent B) has a genotype of ff.

In any situation, the probability of these two having a child that is homozygous dominant for freckles is 0%. (see punnet squares for more info).

Now here's where it gets a little more confusing because the question is kind of vague on this.

Assuming that Parent A is homozygous dominant (both genes for this are dominant (FF)), then the probability of having a heterozygous (non-identical genotype letters, meaning they carry the recessive trait) genotype is 100%. However, if Parent A is also heterozygous, then that percentage decreases to 50%

For Situation A (Parent A is homozygous dominant), the probability of a homozygous recessive genotype is 0%

For Situation B (Parent A is heterozygous dominant), the probability of a homozygous recessive child is 50%.

Please see the Punnet square I made for more information.

Key:

- Homozygous Dominant: FF

- Heterozygous Dominant: Ff

- Homozygous Recessive: ff

(heterozygous recessive does not exist, because that would mean one of the genes is dominant, which would overpower the recessive gene)

I really hope this helps, and if you're confused by this, please do not hesitate to let me know!

8 0

3 years ago

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There is little to no controversy over what it means to be intelligent.

cricket20 [7]

Answer:

False. There are different ways to be intelligent and different measurements.

6 0

3 years ago

A Punnett square is used to _______.

tigry1 [53]

I think the answer its A because a Punnett square allows the prediction of the percentages of phenotypes in the offspring of a cross from known genotypes. A Punnett square can be used to determine a missing genotype based on the other genotypes involved in a cross.

8 0

3 years ago