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3 years ago

60 POINTS AND BRAINLIEST IF ANSWERED WITH EXPLANATION

Biology

2 answers:

liberstina [14]3 years ago

7 0

Answer:

B lymphocytes

Explanation:

Soooo B lymphocytes, are a type of white blood cell of the lymphocyte subtype. They function in the humoral immunity component of the adaptive immune system by secreting antibodies.

Fofino [41]3 years ago

6 0

Answer:

B lymphocytes

Explanation:

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List five examples of mutations. Then classify each as harmful, helpful and neutral and explain your reasoning.

Soloha48 [4]

Answer:

1) sickle cell anemia: Sickle cell anemia is caused due to a point mutation by which a change in the nucleotide causes the code for producing the amino acid valine instead of the amino acid glutamic acid. It is a harmful mutation.

2) Klinefelter’s Calicos: Better known as the Klinefelter’s Syndrome, Klinefelter’s Calicos is a type of genetic mutation in which the person has the pattern of XXY for sex chromosomes i.e the person has an extra X chromosome. It is a harmful mutation.

3) Colour blindness: It is a sex linked mutation caused by two genes coding for the sight of red and green colour on the X chromosome. It is a harmful mutation.

4) Lactase persistence: A mutation allowed the humans to produce lactase enzyme as a result of breast feeding. This is an example of beneficial mutation.

5) HIV resistance: A 32 base pair sequence change in CCR5 helps humans to get resistant against HIV. it is a beneficial mutation.

4 0

4 years ago

A scientific question that can't be tested in an experiment

m_a_m_a [10]

See creation.com for 101 evidences for a young universe. The age of the earth is not a question that can be asked in the present. This is due to the fact that dating methods rely on a number of assumptions.

3 0

3 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

4 years ago

List the four codes for RNA and show how they are paired.

aleksklad [387]

Answer: adenine (A), uracil (U), guanine (G), and cytosine (C). When this base-pairing happens, RNA uses uracil (yellow) instead of thymine to pair with adenine (green) in the DNA template below.Bases. ... The four bases that make up this code are adenine (A), thymine (T), guanine (G) and cytosine (C). Bases pair off together in a double helix structure, these pairs being A and T, and C and G. RNA doesn't contain thymine bases, replacing them with uracil bases (U), which pair to adenine1.

Explanation:

5 0

3 years ago

Help pls I'll give BRAINLEST

kompoz [17]

<h2>ANSWER:</h2>

$\huge\boxed{Negative Feedback}$

<h2>_____________________________________</h2><h2>TYPES OF MECHANISMS</h2>

There are two types of mechanisms

<h3>Negative Feedback Mechanism:</h3>

This mechanism opposes the change that occurs in the body resulting in the decrease of the CHANGE.

<h3>Positive Feedback Mechanism:</h3>

This mechanism enhances the change that occurs in the body resulting in the increase of the CHANGE.

<h2>_____________________________________</h2><h2>THERMOREGULATION</h2>

Thermoregulation is the control of body temperature

<h3>__________________________________________________</h3><h3>Decrease in temperature </h3>

This picture is the mechanism for the THERMOREGULATION (control of the body temperature). It is the negative feedback, as you can see if the temperature is decreased that means the change occurs, so the process of shivering starts which is the movement of muscles which generates the heat resulting in the increase in temperature.

CHANGE: Less Temperature i.e. body cold.

NEGATIVE FEEDBACK: Increases temperature and brings it back to normal.

<h3>__________________________________________________</h3><h3>Increase in temperature </h3>

When the Temperature of the body increases, that means when the change occurs, The Negative feedback mechanism is triggered resulting in the process of sweating which brings the body temperature down.

CHANGE: More Temperature i.e. Body hot

NEGATIVE FEEDBACK: Decreases the temperature by the process of sweating and brings it back to normal.

Best Regards,

"BORZ"

7 0

3 years ago