Which of the following best describes the dependent variable in an experiment? The variable that is measured?
The variable that is manipulated?
The variable that you can see?
The variable that is most common?

The finches on the galapagos island were similar in form except for variations of their beaks. darwin observed that these variations were useful for: attracting a mate defending territory building nests gathering food

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction.

What organs comprise the respiratory system of a bird