Which best describes the importance of mitosis to living organisms?

genetic variation and growth

growth and development

development and sexual reproduction

sexual reproduction and genetic variation

Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?

Tides that occur during the new and full moons

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.