Tertiary means 3rd. So why is it the fourth link? give an explanation for brainliest if 2 people answered

Surrounded by microtubules, located near the nucleus. (don't try to google it) (give answer only if u know)

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. this is an example of speciation.

In this experiment, the was intentionally manipulated. it is the independent variable. the dependent variables that were measured were the