Through mutation, HIV can accumulate resistance to drugs developed for treatment. Describe the relationship between HIV and the humans who developed these drugs in terms of an evolutionary arms race.

Bleeding from the nose (epistaxis) is usually a harmless phenomenon, but may appear in the form of stronger bleeding that threaten life.

Wind turbines are becoming more popular as a renewable energy source in some areas, but are being met with resistance from homeowners because they are considered aesthetically unpleasing.

What three factors affect a land biome?

How and why extra energy taken in is stored in the human body?

ER, Golgi body and other membrane bound organelles often work together to produce a finished functional product. What structure connects them?

What is an abiotic factor of a marine ecosystem? A). Food produced B). Temperature change as you go deeper into the ocean C). Reproduction of animals

1. Suppose that xylem were located only in the roots and stems of a plant. Would fluids in the xylem still move? Explain.

What activity will decrease body temperature? Sweating Exercising Adding clothing Shivering

Organisms with true radial symmetry A. tend to be highly mobile. B. do not have a distinct head region and tend to be sedentary or passive drifters. C. can be divided into two matching halves along only one plane. D.

1. The Earth's carbon cycle consists of the flow, cycling, and recycling of all of the carbon on the Earth. Every living organism's composition includes the element carbon. How does carbon become part of living organisms?