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Leni [432]
3 years ago
11

Pls help...

Biology
1 answer:
ruslelena [56]3 years ago
8 0

Answer:

16.Difference between a Bar Magnet and a Solenoid

The bar magnet is a permanent magnet whereas a solenoid is an electromagnet ie, it acts like a magnet only when an electric current is passed through. ... The poles of the bar magnet are fixed whereas for a solenoid the poles can be altered.

17.When you press a doorbell button, you complete an electrical circuit that allows household electricity to flow through the doorbell's internal electromagnet. The magnetic field generated by the electromagnet is then used to power a mechanism that creates the doorbell sound. Doorbells are low-voltage devices.

Explanation:

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Wax is secreted in the ear to reduce water and friction of sound waves. This is done by fat producing cells that break open alon
lara [203]

The question is incomplete as it does not have the options which are:

A. Merocrine gland

B. Apocrine gland

C. Salivary gland

D. Holocrine gland

Answer:

D. Holocrine gland

Explanation:

Exocrine glands are the organs or the subcellular structures which secrete a substance which is excreted out of the body.

The exocrine glands are different from the endocrine glands as their secreted products are released out of the body which is not in the case of endocrine glands.

The wax is secreted by the sebaceous glands by the production of cells that break along the base of the garland with substance into the ductal system by the exocrine glands called Holocrine glands.

Thus, Option-D is the correct answer.

Holocrine glands will release whole broken open cells into their ductal system. These cells contain the stores of substance to be released by the gland. This method of secretion requires frequent cell turnover and replacement.

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The difference in the concentration of a substance across a space is called a concentration...?
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The difference in the concentration of a substance across a space is called a concentration [ equilibrium / gradient ]. ... If there is a concentration gradient, substances will move from an area of high concentration to an area of [ equal / low ] concentration
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900.j of work are done by a light bulb in 15.0 s. What is the power of the light bulb?
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