6. a biologist hypothesizes that restricting food from mice will decrease their activity. he designs an experiment in which he observes the activity of 50 mice under restricted food regimens. which of he following is true about his study?

a. the study is well designed since it uses a large sample of mice.
b. the study does not include a control group.
c. the study includes too many variables.
d. the results will allot the biologist to draw a valid conclusion.

Group control group #1 experimental group yes yes yes control group #2 no new drug orange juice bed rest no yes no yes ves which of the following is the best explanation of why a second control group was included in this experiment? o a. to provide the volunteers in the study with something to drink o b. to prove that the common cold cannot be cured c. to confuse anyone who is trying to steal their new drug and sell it as their own invention o d. to researchers conclude that results are related to the new drug and not to the orange juice submit e previous

Which of the following molecules could pass through the plasma membrane by simple diffusion? a. na+ ions b. glucose c. amino acids d. carbon dioxide

The effect of a hormone on a target cell may be decreased by the presence of