Answer:
Parasitism
Explanation:
Parasitism is a symbiotic relationship between two species in which one benefits and the other is harmed.
The correct answer is C, oxygen. Oxygen was once harmful and used to cause harm to the DNA in primitive organisms.
Later on, the bacteria developed enzymes that prevented their DNA from damaging action of oxygen. Afterward, they evolved to use it for cellular respiration.
The fossil record is the type of evidence that is used with molecular clocks to estimate the split from a common ancestor.
<h3>What is a molecular clock?</h3>
A molecular clock is an estimation of the times of divergence used for the study of biological phenomena.
Molecular clocks are based on fossils found for a given species and the mutation rate of a given genomic sequence.
In conclusion, fossils are used as point of reference to build molecular clocks based on the mutation rate of homo-logous nucleotide sequences for a given taxonomic group for which these fossils belong.
Learn more about molecular clocks here:
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Answer:
u haven't even given the diagram??? but I believe the answer is B. Diploid
Explanation:
the answer is a fish amphibians and mammals
Explanation:
I took the test