Which of the following is a density-independent population-regulating factor?
A) a tornado
B) a famine
C) a parasite
D) an outbreak of a new, lethal flu strain
A
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What do the results of research on gravitropic responses of roots and stems show?
A) Different tissues have the same response to auxin. B) The effect of a plant hormone can depend on the tissue. C) Some responses of plants require no hormones at all. D) Light is required for the gravitropic response. E) Cytokinin can only function in the presence of auxin.
Organisms use _____ for asexual reproduction
a. mitosis b. binary fission c. meiosis d. more than one of these e. none of these
Antagonistic pairs are what?
What will be an ideal response?
Which of the following is part of the structure of the mitochondria of a eukaryotic cell?
A) cilia B) cristae C) thylakoids D) inclusions E) nucleolus