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ddd [48]
3 years ago
13

If the objective lenses of a microscope can be changed without losing focus on the specimen, they are said to be ______. A) equi

focal. B) totifocal. C) parfocal.D) optifocal.
Biology
1 answer:
aleksandr82 [10.1K]3 years ago
7 0

Answer:

C) parfocal.

Explanation:

A microscope can be defined as an optical device that is typically used to make an enlarged (magnified) image of a minute (small) object and as such reveals all the little information about the object that cannot be seen by the natural human eye.

A microscope is said to be parfocal if its lense is binocular and they can both be in focus.

Hence, if the objective lenses of a microscope can be changed without losing focus on the specimen, they are said to be parfocal.

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The correct answer is B. Worms move through changes in body structure caused by contraction of muscles compressing their watery fluid.

Explanation:

The hydroskeleton consists of a fluid-filled cavity, surrounded by muscles. The fluid pressure and the action of the muscles that border it, serve to change the body's shape and produce a movement such as digging or swimming. The successive contraction of various metamers, which are provided with bundles of circular and longitudinal muscle fibers, stretching and thickening parts of the body, allow it to move horizontally. Hydrostatic skeletons have a role in the locomotion of annelids, nematodes and other invertebrates. The hydroskeleton has similarities with the hydrostatic muscles.

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3 years ago
¿Por qué se denomina fenómeno complejo a la alimentación humana?
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Answer:

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La ciencia nutricional continúa descubriendo mecanismos cada vez más complejos de cómo ... Así, la leche materna se considera un alimento completo específico de la especie (Lönnerdal, ... Si este fuera un fenómeno generalizado, podría explicar algo de la corriente.

Explanation:

6 0
3 years ago
Read 2 more answers
A red blood cell is losing water to its surroundings is in:.
Gelneren [198K]

Answer:

I do not know

Explanation:

You did not explain it well.

3 0
2 years ago
Problems in balance may follow trauma to which nerve?
Agata [3.3K]
The answer u r looking for is- A, Vestibulocochlear. Hope I’ve helped ;)
4 0
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approximately how far away is the epicenter for an earthquake if the p-waves arrive three minutes 20 seconds before the S Wave​
tekilochka [14]

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Only P-waves were recorded at seismic station C because P-waves travel At different avival times

Explanation:

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