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iren [92.7K]
3 years ago
8

Scientific explanation that explains how oxygen and carbon dioxide travel within a seed

Biology
1 answer:
Xelga [282]3 years ago
8 0

Answer:

The two membranes pull apart a little and create a small pocket or sack of air. As the developing bird grows, it breathes in oxygen from the air sack and exhales carbon dioxide. Several thousand microscopic pores all over the surface of the egg allow the CO2 to escape and fresh air to get in.

Explanation:

U 2 can help me by marking as brainliest.......

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When the polymerase chain reaction (PCR) is used to amplify segments of DNA, the sample is first heated, and then cooled, in cyc
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Answer:

At least 17 PCR cycles or 16 PCR cycles

Explanation:

As we know -

In one chain of  heating and cooling  of polymerase chain reaction (PCR), the strands of DNA gets doubled.

The general mathematical representation of this is

{2^n - (2 *  n)}

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It is given that DNA strands  to be produced is 16 times the original quantity of DNA.

So the PCR cycle must be carried out at least 17 times in order to have DNA strand not less  than 16 times the original quantity of DNA

8 0
3 years ago
According to the Moh’s Scale of Mineral Hardness, the sample mineral that will scratch gypsum but not apatite is MOST LIKELY A)
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HI

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6 0
4 years ago
How are elemens and compouds related,
Inessa [10]

Answer:

An element is a material that consists of a single type of atom. which Each atom type contains the same number of protons. the Chemical bonds link elements together to form more complex molecules called compounds. A compound consists of two or more types of elements held together by covalent or ionic bonds.

Explanation:

5 0
3 years ago
Approximately how long has the victim been dead if his body temperature was 60.0°F?
Lesechka [4]

Answer:

around 8 or 9 or 10 hours.

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7 0
4 years ago
Read 2 more answers
Please answer right! thanks ​
cestrela7 [59]

Answer:

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I hope that helped you!

6 0
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