7. What are the two main parts of a lipid? I 8. Explain what makes a fat saturated or unsaturated?
9. Describe the structure and the role of steroids.
10. What is the role of wax to an organism?

Match each description to the appropriate biome. tropical savanna desert tropical rain forest taiga tundra has sparse vegetation and very cold temperatures located near the equator and contains trees that form dense canopy layers is very hot and dry, and has plants that need little water has cold winters, heavy snowfall and is dominated by conifers has warm temperatures and is dominated by grasses

Fungi are classified into how many groups? a. 1 group b. 2 groups c. 3 groups d. 4 groups

Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins