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MA_775_DIABLO [31]

2 years ago

7

The multicellular condition of animals and fungi seems to have arisen ________. due to common ancestry by convergent evolution b

y serial endosymbioses by inheritance of acquired traits

1 answer:

user100 [1]2 years ago

6 0

Due to convergent evolution

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Suppose the human trait for hair type is controlled by a simple dominant and recessive relationship at one locus. Curly hair, C,

Zepler [3.9K]

Answer:

The frequency of the dominant allele, C $= 0.2234$

and the heterozygous genotype, Cc $= 0.1736$

Explanation:

Given -

Curly hair, C, is the dominant allele, and straight hair, c, is the recessive allele

Thus, C is dominant over c

The genotype frequency of curly hair is $52$ in $131$ students

so, remaining $131-52 = 79$ are straight hair students.

Since straight hair is a recessive allele , the genotypic frequency of "cc" is

$\frac{79}{131}\\0.6030$

Frequency of "cc" is represented by $q^{2}$

Thus frequency of allele "q"

$= \sqrt{0.6030} \\= 0.7765$

As per Hardy Weinberg's I equation -

$p+q=1\\p + 0.7765=1\\p = 0.2234$

As per Hardy Weinberg's II equation -

$p^{2} +2pq + q^{2} =1\\0.2234^2+2pq+0.6030=1\\2pq= 0.1736$

Hence,

The frequency of the dominant allele, C $= 0.2234$

and the heterozygous genotype, Cc $= 0.1736$

7 0

2 years ago

In normal cells, stathmin is inactivated by phosphorylation at the start of M phase. Phosphatases remove these phosphates as the

Sloan [31]

Answer:

The enzyme that is responsible for this is the cyclin dependent kinase subunit of mpf

Explanation:

This enzyme is also known as cyclin dependent kinase subunit, CDKs. they are protein kinases and can function as cell cycle regulators. They have the power to modify different protein substrates that are useful for the progression of cell cycle. CDKs are inhibitors hence stathmin is inactivated by phosphorylation. They help to control cell divisions. DNA should not be damaged for cell to move from G₁ to the S phase.

5 0

2 years ago

The bulk of carbon dioxide is carried chemically combined with the amino acids of hemoglobin as carbaminohemoglobin in the RBCs.

e-lub [12.9K]

Answer: True

Explanation:Carbon dioxide is transported is transfer in 3 basic ways to human cells.

About 20 % of C0 2 is transported as Carbaminohemoglobin to reach the lungs carbon dioxide binds directly to the amino acid moieties on the globin portions of the haemoglobin to form carbaminohemoglobin. This is a reversible reaction as shown below.

CO2 + Hb ↔ HbCO2.

The reversible binding of C02 to the haemoglobin is due to the the partial pressure of carbondioxde. In the lungs the partial pressure of C02 is low. Therefore C02 is unbounded from the HB and leaves in the lungs, thus the blood leaving the lungs for the body tissues has low partial pressure C02. Compare to the blood in the tissues with high partial pressure of C02 from metabolic activities of cellular respiration. The C02 therefore diffuses from the tissues to bind with HB to form Carbaminoheamologbin.

In addition C02 is transported by other means.

1. As bicarbonate 70% of the Co2 in the blood is transported and bicarbonate buffer.

CO2 + H2O CA ↔ H2CO3↔H+ + HCO3

2, As soluble carbon dioxide which dissolves directly in to the blood stream; this is about 7-10%

3 0

2 years ago

Mason drew the cladogram shown. Which statements best describes the cladogram? Select three options. (HURRY I WILL MARK BRAINLIE

Yuki888 [10]

Answer: Correct options B, D and E.

Explanation:

In the cladogram, we can see that in the first branch we have a division, one branch goes to fish and the other goes to a division (a division means a common ancestor)

Then the fish are the most primitive (being directly related to the first ancestor)., E is true.

We also can see that between fish and birds we have 3 separations (the ancestor in common is 3 "generations" behind), and between frog and birds we have two separations (the common ancestor is 2 "generations" behind), so frogs are more closely related to birds than fish.

So D is also true.

We also can see that the only pair that has only one ancestor in common are birds and reptiles, so the ones that are most closely related are birds and reptiles. B is also true,

7 0

2 years ago

Which energy conversion happens when a person shivers and the energy is transferred to make the muscles and joints move? answer?

iris [78.8K]

So, I haven't really seen this question I think but in my class when we had science before we learned about Kinetic and Potential energy. So, my most best answer I can give is most likely Kinetic Energy. Sorry if it's wrong. Hope this helps! ^^

6 0

2 years ago