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:
DNA Synthesis the number of chromosomes is altered so that there are either too many or too few chromosomes in the cells.
Explanation:
The answer is B.) animals at the end of the food chain would not get enough food to stay alive.
Starch and Cellulose is formed when many disaccharide molecules are combined
Answer:
Researchers also found that the longer a male's tail feathers, the faster he was able to shake them. This effort would require more muscular strength, and might be a powerful signal of fitness to the females.
Explanation:
