Which statements best describe natural selection? Check all that apply.

a. Populations must have genetic variation.
b. Genetic mutations do not produce advantageous traits.
c. Natural selection occurs when the environment changes.
d. Evolution works independently of natural selection.
e. Organisms best suited for the environment survive and reproduce.

What are two different ways you could find the value of a? explain these methods.

According to newton’s law of universal gravitation, which statements are true? as we move to higher altitudes, the force of gravity on us decreases. as we move to higher altitudes, the force of gravity on us increases. as we gain mass, the force of gravity on us decreases. as we gain mass, the force of gravity on us increases. as we move faster, the force of gravity on us increases.

Ajoint produces movement when its angle decreases. which type of movement is it?