Gases can spread out in all directions because a. the particles vibrate in place. b. the particles grow bigger. c. the particles are randomly placed and moving freely. d. the particles are not moving.

Crossing over is a method of (blank)?

What is the correct order of cell division? include what happens in each phase

How do the sperm cells get from the stigma to the ovules? a. they slide down the petals to the bottom of the flower. b. they travel through pollen tubes. c. they travel along filaments. d. insects carry the sperm cells from the stigma to the ovules.