Changes in pressure which can cause rocks to crack is an example of

I’m doing some practice exam questions for biology, and i’m not sure how to do these 3 parts to the question.

Do you think the gene eef1 alpha1 supports cell theory? explain your response.

Which short-term environmental changes would a very small asteroid or comet impact on earth most likely cause? check all that apply. flooding extinction craters on surface changes in weather patterns death of organisms and populations