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Sphinxa [80]
2 years ago
10

Underlying blood vessels give nails a pinkish appearance. Near the nail root, however, the blood vessels lie deeper in the skin,

resulting in a pale crescent, called the:
Biology
1 answer:
creativ13 [48]2 years ago
4 0

Answer:

lunula

Explanation:

The lunula is crescent-shaped whitish colored area of bed of the nail.

<u>It is present at end of the nail.The lunula is not actually white in color but only appears white when it is seen through nail.  </u>

<u>Outlining nail matrix, lunula is extremely delicate part of structure of the nail. If one damages lunula, nail will be deformed permanently.</u>  

It appears whitish in color because of the  stratum basale obscures that underlies blood vessels.

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You have a plant with yellow seeds, which express a dominant phenotype. How would you determine the plant's genotype? Conduct a
Archy [21]
The answer is <span>Conduct a test cross with a purebred recessive plant. 

</span>

Test cross is the cross between an organism with unknown dominant genotype and an organism with known recessive genotype.

<span>Since dominant trait results from a dominant allele, the test cross can determine if an unknown genotype is heterozygous and homozygous dominant. </span>

If A is dominant allele, and a is recessive allele, then AA is dominant homozygote, Aa is a heterozygote, and aa is recessive homozygote.

<span>According to the Punnett square, if all of the offspring are heterozygote (Aa), then unknown genotype is dominant homozygous (AA). If half of the offspring are the heterozygote, and the other half are recessive homozygote, then the unknown genotype is heterozygote (Aa).</span>

6 0
3 years ago
Which is an example of population density?
Rudik [331]

Answer:

D: two jaguars per thousand hectares.

Explanation:

Population density refers to the computation of population by unit area. It is usually implemented in living organisms, generally in humans. It is a key geological term. In easy form, population density implies to the number of people existing in an area per square kilometer or hectare, etc.

So, two jaguars per thousand hectares is an example of population density as it involves the number of jaguars (population) per thousand hectares (per unit area).

8 0
3 years ago
An operon encodes enzymes for making an essential amino acid and is regulated like the trp operon. Which of the statements is tr
xxTIMURxx [149]
"The <span>amino acid acts as a corepressor" is the statement among the choices given in the question that is true. The correct option among all the options that are given in the question is the second option or option "B". I hope that this is the answer that has actually come to your great help.

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7 0
3 years ago
Epinephrine, insulin, and auxins are all examples of that help produce feedback.
JulsSmile [24]

Answer: cofactors.

Explanation:

Epinephrine, insulin and auxins are cofactors.

Cofactors are non protein substance which activate enzymes activity by increasing the rate of chemical reaction of enzymes. They are organic molecules and they assist in enzyme activity. They exist in performing some reactions the enzymes cannot perform alone.

For example, insulin activate enzyme hexokinase which phosphorylate glucose.

8 0
3 years ago
Read 2 more answers
This is a graph of the mean, or average, number of beans eaten for every three days.
dlinn [17]

Answer:

1-3:light

4-6:dark

7-9:light

Explanation:

8 0
3 years ago
Read 2 more answers
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