How many trophic levels are there in the following food chain?

algae

mosquito larvae

dragonfly larvae - trout

How do humans shield plants and animals from natural selection? How do you think human can cause the genes for desirable characteristics to become more common?

Which of the following statements about mitochondria is TRUE? A. The outer mitochondrial membrane is impermeable to ions and small molecules. B.

What evidence did Darwin use to support his theory of evolution? Check all that apply.

Which of the following stages in the breakdown of the piece of toast you had for breakfast generates the most ATP? A) the digestion of starch to glucose B) glycolysis C) the citric acid cycle D) oxidative phosphorylation

N your household, there is you, a cat, and a dog. How many populations are there?

A rock is classified as

Which of the following types of compounds is unlike the other three A - Wax B - Saturated fat C - phospholipid D-polysaccharide

What predictions can researchers make based on the egg viability hypothesis?

What occurs after a disturbance in primary succession?

A person driving a car applies the brakes. This produces friction, which stops the car. Into which type of energy is the mechanical energy of the car converted