2. Which of the following is not a trace element in

the human body?

a. iodine

b. zinc

c. iron

d. calcium

What is a sustainable resource? A. A managed resource that has 10 years of life B. An unmanaged resource that has 50 years of life C. A managed resource that is made to last D. An unmanaged resource that is limitless

The force of gravitational attraction between the Sun and Venus could be increased by reducing which of the following? 1. The distance between the Sun and Venus 2. The period of rotation of the Sun 3. The mass of the Sun and Venus 4.

In an animal that switches between sexual and asexual reproduction is called

What would happen if the barrier island were removed?

Drag the terms to their correct locations in this concept map.

Select the correct statement about antigens. A. One antigen may have many different antigenic determinants and may therefore cause the formation of more than one antibody. B. Only small antigens exhibit reactivity. C.

Which molecule is the source of basic material used for the production of glucose in the calvin cycle?

Why do cells need to be able to transport substances across their membrane

Which is a characteristic of all waves?

What does the heart do?