1) hiv weakens the immune system by killing a. antibodies. c. t cells. b. b cells. d. killer t cells.

2 ) which of the following statements is false regarding an autoimmune disease?
a.
the body reacts with its own cells and tissues
c.
it can involve cell-mediated responses
b.
its mechanism is well understood
d.
it can involve humoral responses

If bacteria are much too small to see, what is one reason why can we see colonies in the petri dishes that have plenty of food to eat after only a few days?

What are simmilarities and differences between anaerobic respiration in animal and yeast cells? would prefer to get simmilarities as i already got some differences. you!

Select the correct answer. which mutation is harmful to the organism? a. a mutation allowing moths to camouflage better on blackened tree bark b. a mutation making staphylococcus aureus resistant to the antibiotic methicillin c. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell d. a mutation causing uncontrolled cell division e. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them