Tannins are chemicals that help plants repel invaders by
A. over-stimulating the predator.
B. sedating the predator.
C. binding to proteins and thereby disrupting the predator's digestion.
D. injuring the external covering of the predator's body.
E. causing the predator to grow so rapidly that it dies.
C. binding to proteins and thereby disrupting the predator's digestion.
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Which of the following is NOT part of the grazing food web?
a. detritivores b. primary producers c. primary consumers d. secondary consumers e. tertiary consumers
What is the knot of capillaries in the nephron where blood is filtered?
A) Renal cortex B) Collecting duct C) Glomerulus D) Glomerular capsule
The primer used for DNA replication
a. is a short strand of RNA added to the 3? end. b. is needed only once on a leading strand. c. remains on the DNA after replication. d. ensures that there will be a free 5? end to which nucleotides can be added. e. is added to only one of the two template strands.
Which of the following is not a strategy of the body to defend against foreign organisms and cancer cells?
A) physical barrier B) adaptive immune response C) internal cellular defense D) antibiotic pills