What is an ecotone?
a. a parasite that is external to the body
b. a parasite that is internal to the body
c. an example of an individualistic hypothesis
d. a zone between two communities
e. the combination of species in an environment that is constant
D
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Is there a difference in genetic material between sister chromatids? Explain
What will be an ideal response?
Your professor brings in a soybean plant that he uprooted from nearby. Small growths on the roots are stained to show bacteria. Your professor explains the bacteria can "fix" nitrogen into a usable form for the plant. The growths are called
A. root hairs. B. nodes. C. sieve tubes. D. nodules. E. internodes.
In seed plants,
a. xylem conveys sugar from the production site to the storage site. b. fertilization requires water. c. fertilization produces a zygote within the pollen sac. d. male gametophyte and female gametophyte develop independently. e. microspores enlarge to become megaspores.
Aposematic, or warning coloration, serves to protect an animal or plant by signaling to potential ________ to stay away.
A. competitors B. predators C. mates D. rivals