Resource partitioning may include which of the following?
a. relocating nesting sites
b. feeding at the same time of day
c. eating the same prey
d. overlapping reproductive seasons
e. intraspecific competition
a
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A farmer uses triazine herbicide to control pigweed in his field. For the first few years, the triazine works well and almost all the pigweed dies; but after several years, the farmer sees more and more pigweed. Which of these explanations best explains what happened?
A) The herbicide company lost its triazine formula and started selling poor-quality triazine. B) Natural selection caused the pigweed to mutate, creating a new triazine-resistant species. C) Triazine-resistant pigweed has less-efficient photosynthesis metabolism. D) Triazine-resistant weeds were more likely to survive and reproduce.
Which of the following is not attached to the central carbon atom in an amino acid?
a. A side chain ("R group") b. A carboxyl functional group c. An amino functional group d. An oxygen
How do fungi typically reproduce?
A. by spores B. by fruits C. by rhizomes D. by seeds
Counter the following argument: "Sexual reproduction is just an accident of evolution, once established it is irreversible. We do not need to invoke specific benefits to explain its maintenance."
What will be an ideal response?