Answer: He used it to study the ancient cells in fossilized wood.
Explanation:
Ecological succession occurs due to the changes in physical environment and population of species. In an ecosystem, a species requires a particular set of environmental conditions under which they grow and reproduce.
Answer:
D
Explanation:
the hypothalamus is part of our brain that control our body temp, heart rate etc
pituitary is the master gland controlling the other glands in your endocrine system
