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sukhopar [10]
2 years ago
14

What is the composition of a tetrad at the beginning of prophase i?.

Biology
1 answer:
Stolb23 [73]2 years ago
7 0

Answer:

One pair of homologous chromosomes.

Explanation:

One chromosome in a tetrad is paternally inherited, while the other is maternally inherited. Each chromosome consists of two chromatids.

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The excretory system helps the respiratory system by
Leto [7]

Answer:

The excretory system helps the respiratory system by removing carbon dioxide that is produced during respiration (third option).

Explanation:

The lungs are in charge of the breathing process, being the main organ of the respiratory system. Each lung is considered an excretory organ —belonging to the excretory system— since it is capable of eliminating the carbon dioxide (CO₂) produced by the metabolism during expiration.

As a result of the gaseous exchange, the oxygen entering the lungs through the inhaled air passes into the blood, while the CO₂ is removed from the blood. This CO₂ is removed during expiration, which makes the lungs part of the excretory system.

The other options are not correct because:

  • <em>The excretory system does </em><u><em>not introduce more oxygen into the lungs</em></u><em>. </em>
  • <em>The </em><u><em>circulation of blood in and out of the lungs</em></u><em> is a function of the circulatory system. </em>
  • <u><em>Urine is not produced by breathing</em></u><em>.</em>
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3 years ago
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2 years ago
Oil and gas are now being extracted in large quantities directly from organic-rich
stealth61 [152]

Answer:

333

Explanatio3n:

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3 years ago
What is the lyric cycle?​
kvv77 [185]

a replication process carried out by a virus within a bacterial cell

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a sample of dna contains 20 percent adenine and 30 percent cytosine. What percentage of tymine would you expect to find.
romanna [79]
20 percent.

Since one strand is 20, the opposite that would connect with it (Thymine) would have the same amount so the total would be 100.

Hope this helps!
4 0
3 years ago
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