Answer:
An asteroid impact.
Explanation:
An asteroid impact is considered to have tossed rubble across the earth, killing off many species of plants and animals, 65 million years ago. Volcanic activity is involved in at least four mass extinctions, whereas an asteroid in just one.
Answer:
Populations have variation in traits due to random mutation, crossing over and environmental conditions.
A red shift means that the object is moving away from you.
Answer:
i think its c, but could you tell me if its right or not?
rate 1 if its not right
Explanation:
domain bacteria; kingdom eubacteria
