How did Darwin explain the differences in traits?

Expressions of a trait such as yellow versus green seeds are referred to as?

In the 1990s, fat-free foods became popular among people trying to lose weight. However, many dieticians now conclude that the fat-free trend made people less healthy and heavier. Describe how this could occur. (Short answer)

Which epithelia forms the walls of the air sacs across which gas exchange occurs in the lungs?

A flower can generate an embryo through self-fertilization. What statement best describes the process of self-fertilization in the flower? A. An egg produced by the ovary falls onto the anther, causing pollen on the anther to project a pollen tube.

This blood vessel supplies the heart muscle with oxygenated blood?

Each of the following statements concerning hair is true except A. scalp hairs grow constantly throughout life. B. the cortex of the hair is composed of hard keratin. C. the medulla is the soft core of the hair. D.

Some neural tissues retain stem cells and thus the capacity to divide and replace lost neurons. Which of these special senses can replace its damaged neural receptors? a) proprioception b) vision c) olfaction d) hearing e) equilibrium.

Management science replaces common sense with scientific analysis. a. True b. False

What events caused the formation of most islands in the South Pacific?

How do plants depend on bacteria?