<span>Class and Family is the answer
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Answer:
Your answer is B). Massive stars undergo a supernova at the red giant phase.
Molecular clocks use rates of mutation to measure evolutionary time.Mutations add up at a fairly constant rate in the DNA of species that evolved from a common ancestor. The more mutations that happened in each lineage, the greater is the differences between these lineages.
Answer:
D:producing an offspring to continue their species. hope it helps
Explanation:
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Ragweed antigens bind ragweed and then bind mast cells which release histamine
<span>Allergies develop because of a Th2 response against the allergen. </span>
