Which of the two has better depth perception?

The biological concept of species states that ” a species is a group of”:

The most recent and most powerful evidence of biological evolution, is provided by studies of:

Which of the two has better depth perception?

What does the theory of Evolution, as stated in Darwin’s  Origin of Species, states?

Which of the following chemicals is NOT a neurotransmitter?

Evolution can be defined as :

Which of the following is a factor that would account for a population in never changing “equilibrium”(Hardy-Weinberg).

The limits set by the living and non-living environments (availability of food, space, competition, interactions, natural events), that affect population growth, are known as:

Which of the following chemicals is NOT a neurotransmitter?