What is emigration?
a. when animals move into an ecosystem
b. when animals die in an ecosystem
c. when animals leave an ecosystem
d. when animals are born in an ecosystem

Classify the descriptions and examples as endocrine or neural control

Amylase is an enzyme found in the human digestive system. why do you think it was important to keep the enzyme temperature about 37 degrees celsius (98.6 degrees f)? describe what might happened the temperature decreased by 10 degrees celsius.

Are salt and soap nutrients or toxins for yeast? explain.