Which three items below are true about evolution? * Mutation, natural selection, and migration all can contribute.
Is the same as natural selection.
Genetic mutations play a role
It is observable.
It happens abruptly (quickly).

Identify the missing parts of the carbon cycle

Ascientist wants to determine the effect of a new type of gasoline. he fillsone car with normal gasoline and another identical car with the new gasoline. which is the control group? a. the new type of gasolineb. the car with the normal gasolinec. the car with the new gasolinethe amount of gasoline usedd. the amount of gasoline used

What is the ecological role of food chains and food webs