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kvasek [131]
3 years ago
12

What are the two chemicals that go back and fourth in the oxygen cycle

Biology
1 answer:
ryzh [129]3 years ago
3 0

Answer:

oxygen and carbon dioxide

Explanation:

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evablogger [386]

Answer:

the answer is D

Explanation:

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3 years ago
What did Charles Darwin discover as a result of his experiments with breeding pigeons?
DENIUS [597]

Answer is A. Desirable traits can be selected for and bred in offspring.

Charles Darwin found that there are variations among the individuals of the same species depending on the specific location. These variations may occurred may be due to environmental factors such as availability of food resources, climate differences, and predator-prey relationships.  

The experiment with breeding pigeons was aimed to duplicate natural selection through artificial selection. As a result new trait was developed over a period of time. Therefore, desirable traits can be selected and bred in offspring.


5 0
3 years ago
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Where are short tandem repeats found in the cell (STR)?
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<span>d) at the ends of the complete DNA strands

</span><span>Chromosome is the instruction that consist the gene. </span><span>A gene is a hereditary unit that is made up of  a sequence of DNA that occupies a specific location or site  on a chromosome, and which can be transcribed or copied into an RNA molecule that may function just as it is, or be translated  into amino acids.</span>
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4 years ago
Anaerobic step of cellular respiration in which glucose is split
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Natural gas drilling locations are determined by
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