I do believe the answer is B
The KT boundary marks a mass extinction event. the KT boundary is the time between the Cretaceous and Tertiary periods. An asteroid hit the earth at the end of the Cretaceous and that caused the end of the Cretaceous period. Before the KT boundary, pollen from angiosperms and gymnosperms is high. After the meteor hits the earth, a mass extinction occurs and the amount of pollen from gymnosperms and angiosperms decreases dramatically, while the amount of spores from ferns increases. During the Cretaceous period there were many species of gymnosperms and angiosperms but they disappeared at the KT boundary, when the asteroid hit the earth.
Answer:
there is an abundance of fertile soil
climate and fertile soil are crucial for plant growth
Answer:Sleep helps keep your heart healthy
A regular sleep pattern can help to lower the levels of stress and inflammation to your cardiovascular system, which in turn can reduce your chances of a heart condition.
Explanation:
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Answer:
Emergence of an evolutionary adaptation
Explanation:
