Write the letter of the term or phrase that best describes how each numbered item function? 1. Virus envelope A. security guards get sick and die
2. bacteriophage B. door key
3. HIV infection C. a rumor being spread among people
4. influenza D. a hypodermic needle

The graph shows the solubility of several different salts in water, across a range of temperatures. according to the graph, which salt can dissolve at a concentration of about 60 g/100 cm3 of water at 40 degrees celsius?

Which of the following best describes the expensive tissue hypothesis? brains require more energy, so the gut had to be reduced, and larger brains and tool use led to higher quality diets. increasing body size means that homo neanderthalensis had to include more fat in its diet. brains require more energy, so the gut had to be reduced as brains got bigger. brains require more fat, so the gastrointestinal viscera (gut) had to expand, and hands were needed to acquire more food.

What can happen to an enzyme as tempature rises