All known diseases caused by prions affect the ___ of the host organism. (

a. skin, (

b. respiratory system, (

c. nervous system, (

d. liver

Guess what percent of your DNA is the same as the following organisms. A weed? A fruit fly? A mouse? A chimpanzee?

Fill in the blank with the best word to complete the sentence. White blood cells protect against and aid in blood clotting when injuries are sustained.

If a biologist wanted to analyze the evolutionary relationship in a gene that is found in both eukaryotes and bacteria, which of the following would not be useful?

Should scientific knowledge and personal beliefs play equal or unequal roles in decisions about biotechnology?

How are forest and grassland main

Plants do not just use photosynthesis to make sugars for energy storage. Identify other kinds of uses plants have for these substances.

Phyllis is looking for food items high in omega-6 fatty acids. which item should be in her shopping cart?

What is one important way to control the spread of virsues

Which of the following is a way that human modification of limiting factors causes unbalance in ecosystems? a. habitat loss b. pollution c. climate changes d. all of the above

What is the difference between dominant and ressesive trait