How many trophic levels are there in the following food chain?
grass → grasshopper → frog → snake
a. five
b. four
c. three
d. two

Based on the data in your tables, did the light-colored moths have a higher or lower survival rate after the industrial revolution?

Ais a group of individuals of the same that exist together in the same place at the same time

What is the function of the somatic nervous system? connects the brain and the spinal cord to the rest of the body carry signals to the muscles and glands includes all nerves controlling the muscular system and external sensory receptors controls internal organs like the heart and bladder