Few fossils of the earliest animals still exist because they

Biology

1 answer:

vazorg [7]3 years ago

6 0

C is probably the best answer choice: Were soft bodied and tiny, therefore unlikely to fossilize.

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Breaking cells open to release the DNA.
Separating DNA from proteins and other cellular debris.
Precipitating the DNA with an alcohol.
Cleaning the DNA.
Confirming the presence and quality of the DNA.

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How does inorganic nitrogen from the atmosphere (N2) get into living systems?

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Answer:

When an organism excretes or dies, nitrogen is in the form of organic nitrogen in its tissues (e.g. amino acids, DNA). During the ammonification process, many fungi and prokaryotes then break the tissue down and release inorganic Nitrogen into the atmosphere as ammonia.

Explanation:

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Reproduction and development enable species survival. Cells are what make up organisms. ... Without the ability to reproduce, a species would become extinct, which would lead to a decrease in biodiversity.

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Rashid [163]

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Secretions from the highlighted glands ________. secretions from the highlighted glands ________. produce a layer of enzyme lade

aleksley [76]

<h3>Answer;</h3>

produce a layer of enzyme laden mucus that captures dirt and destroys inhaled bacteria

<h3>Explanation;</h3>

Secretions from the highlighted glands produce a layer of enzyme laden mucus that captures dirt and destroys inhaled bacteria 
During inhalation airt that contains dust particles or bacteria or other microorganisms may enter the air ways.
The layer of the airway covering the airways, is rich in antimicrobial compounds and mucins that are responsible for removal bacteria and other microorganisms from the airway .
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