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frutty [35]
3 years ago
11

A student measures the range of sound frequencies that the human ear can hear by playing sounds for volunteers between 10 and

Biology
1 answer:
Mrrafil [7]3 years ago
7 0

Divide 9 by 10 and then add it to 20 and then20 add cuz they do not then you go

Explanation:

ik

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The cells involved in innate immunity, whose absence increases the chances of developing malignant tumors, are _____.
Alexeev081 [22]

Answer:

The correct option is B (natural killer cells).

Explanation:

Natural killer cells: They are defined as the type of cytotoxic lymphocyte which are critical to the innate immune system. The NK cells play an important role in to provide rapid response to tumor formation, virus infected cells, and acting after three days of infection.

While cancer cells die, they release some antigens, than these antigens are recognized by the immune system, and later they are presented on the immune cells which are known as antigen presenting cells. So, if these cells are absent than they increase the chances of developing malignant tumors.

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3 years ago
Describe three functions of proteins.
Maksim231197 [3]

Answer:

search it up

Explanation:

Growth and Maintenance.

Causes Biochemical Reactions. ...

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Provides Structure. ...

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Answer:

The main purpose of the circulatory system is to transport blood, oxygen, nutrients and hormones to and from different cells and tissues throughout the body.

Explanation:

This system works hand-in-hand with the respiratory system to facilitate the exchange of oxygen and carbon dioxide within the blood per the alveoli in the lungs.

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What is the name of the muscular layer in blood vessels.
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Water mitosis and Metosis​
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Mitosis results in two identical daughter cells, whereas meiosis results in four sex cells.

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