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Goshia [24]
3 years ago
14

The period of the embryo begins atand ends withwhich takes about

Biology
1 answer:
Inga [223]3 years ago
7 0

Answer:

The first 2 weeks of development is the germinal period. The germinal period begins with conception and ends when the blastocyst is fully placed into uterine tissue. Next, the embryonic period lasts from implantation until about 8 weeks from the time of conception.

Explanation:

The third thru the eighth  week is known as the embryonic period, and the time from the ninth week until birth is known as the fetal period.

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2. In the citric acid cycle, malate is oxidized to oxaloacetate by the enzyme malate dehydrogenase, which uses NAD+ as an electr
atroni [7]

Answer:

NAD+ act both as coenzyme as well as electron acceptor compound and get reduced to NADH by accepting electron.

Explanation:

NAD+ act as co enzyme of various biological catalyst such as malate dehydrogenase, isocitrate dehydrogenase etc.

             NAD+ can act as co enzyme only in its oxidized form but not in its reduced form called NADH.

         Many reaction needs NAD+ to occur such as conversion of glyceraldehyde 3 phosphate to 1,3 bisphosphoglycerate, malate to oxaloacetate.

              That"s why NAD+/NADH ratio is kept very high because if this ratio bychance get  low then it will hamper the normal redox potential of NAD+/NADH.As a result many biochemical reaction will not take place.

6 0
3 years ago
The middle ear is normally filled with Group of answer choices mucous collections. blood. air. serous fluid.
IrinaK [193]

Answer:

A healthy ear is filled with air

Explanation:

5 0
2 years ago
(03.04 MC) Two locations have different water vapor content in their atmosphere. Which of these is likely to be recorded?​
stellarik [79]

Answer:

In the diagram below, points A and B identify two points in the atmosphere above ... If air has a dry-bulb temperature of 2°C and a ... likely weather conditions? ... What was the relative humidity of the air when these temperatures were recorded?

Explanation:

5 0
3 years ago
Examine the evolutionary tree below. this tree tells us that the amnion is found in ________.
posledela

Answer:

this tree tells us that the amnion is found in mammals, lizards, snakes, crocodiles, and birds

Explanation:

4 0
3 years ago
If a sample of DNA has 16% adenine(A) then what is the percent of guanine?
Anastasy [175]
39%. Adenine would have the same percentage as Thymine, meaning it would he 32% A and T and then subtract that from 100 giving you 72 divide that by 2 and you get part Guanine and part Cytosine.
4 0
3 years ago
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