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Anastaziya [24]
3 years ago
12

How oxygen, nutrients, and wastes are exchanged between maternal and fetal

Biology
1 answer:
11111nata11111 [884]3 years ago
6 0

Answer: The blood vessels in the umbilical cord, the fetus receives all the necessary nutrition, oxygen, and life support from the mother through the placenta.

Explanation:

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Which chemical disinfectant works by methylating enzymes and nucleic acids and is known for being toxic and carcinogenic?
kifflom [539]

Answer: Formaldehyde

Explanation:

The chemical agent that is carcinogenic in nature is Formaldehyde. It causes irritation in the living tissues and therefore should not be used as an antiseptic.

This can be used a chemical disinfectant which works by killing the harmful organisms by methylating enzymes and nucleic acid. This is toxic in nature and hence used as chemical disinfectant.

3 0
4 years ago
Objective has the largest depth of field.
TiliK225 [7]

Answer:

The correct answer is option - C. low power objective.

Explanation:

In microscopes, low power objectives have a wide field of view and use to study the many smaller specimens or large specimens. 10X is the power of the low objective.

To study the depth of the field the lower objective rotated and aligned on the place over the specimen. When you move to high power objective the field of view gets close in and only can study the smaller specimen or small section of a large specimen.

Thus, the correct answer is option - C. low power objectives.

5 0
4 years ago
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4 0
4 years ago
Why is an action potential an all-or-none response to stimuli?
prisoha [69]
The answer to an <span>action potential an all-or-none response to stimuli </span>voltage-gated ion channels open when membrane potential passes a particular level
7 0
3 years ago
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4 years ago
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