During an autoimmune response, the body's immune cells may attack ________.
a. the cells in the pancreas
b. All of these choices
c. the cells in the thyroid
d. the cells in the skin
e. the neuromuscular junction
b
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In transcription,
a. several RNA molecules are made from the same DNA molecule. b. promoters are needed so that RNA polymerase can bind to DNA. c. DNA passes its information to messenger RNA. d. a specific enzyme called RNA polymerase is required. e. all of these
Which of the following is an example of r-selected organism?
A. Coconut palm B. Flies C. Elephants D. Humans E. Horses
The large diversity of biological molecules depends on the element ________. This element can make stable bonds to itself and to atoms of other elements. Without this element, the large macromolecules that make up most of the molecules in living organisms would not be possible.
A. carbon B. hydrogen C. nitrogen D. oxygen
Which trait is probably not caused primarily by genes that behave codominantly or epistatically?
A) height B) general body structure C) skin color D) eye color