An organism that feeds on plant or algal tissues is referred to as a(n)
A) herbivore.
B) omnivore.
C) carnivore.
D) decomposer.
A
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Your parents are both heterozygous for the recessive disorder phenylketonuria (PKU). What is the
probability that you will have the disorder?
a. 25% regardless of the health of your 3 siblings b. 50% no matter whether or not you have siblings c. 75% no matter whether or not you have siblings d. 100% even if you are an only child e. 25% but only if your three siblings are healthy.
Which of the following statements about the cell-mediated response is false? a. Cyotoxic T cells touch-kill any body cells that display viral antigen-MHC complexes on their surfaces
b. A dendritic cell that engulfed a sick body cell displays antigen from that cell, becoming an antigen-presenting cell. c. Activated cytotoxic T cells differentiate into memory cytotoxic T cells and effector helper T cells. d. Naive helper T cells bind to antigen-MHC complexes on dendritic cells.
Each __________ develops into a pollen grain. Fill in the blank(s) with the appropriate word(s)
Growth-factor stimulation of the Ras/Raf/ERK pathway initially stimulates the synthesis of cyclin
a. A. b. B. c. C. d. D.