In plant cells, what provides cellular support and protects cells from pathogens?
a. the cell wall
b. the cell membrane
c. the cytoplasm
d. the plasmodesmata
Answer: a. the cell wall
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Actinomycetes are usually found in ________ habitats.
A. freshwater B. marine C. medical D. soil
Hypertension can be caused by all of the following EXCEPT
a. abnormalities of the cortex of the adrenal glands. b. advanced age. c. certain medications. d. kidney disease. e. exercise
What type of cells do not undergo mitosis?
A. All cells of the body except gametes (i.e., only somatic cells) B. Gametes C. Both somatic cells of the body and gametes D. Neither somatic cells of the body nor gametes
If a study of several pedigrees demonstrated that two parents are normal but their children express a
trait, then the trait is controlled by a a. codominant gene. b. simple dominant gene. c. recessive gene. d. sex-linked gene. e. No conclusion can be drawn.