Which of the following is a weakness of the biological species concept?
Group of answer choices
Experts can disagree about whether populations are similar enough to be the same species.
It isn’t applicable to asexual, fossil, or geographically isolated species
It requires phylogenetic trees, which haven’t been estimated yet for many lineages.
It was the first rigorous species concept published.
Which of the following is a weakness of the biological species concept? Group of answer choices...
Under the biological species concept, which of the following statements is/are true? a) Gene flow can occur between species. b) Species are independent evolutionary lineages. c) Isolating mechanisms prevent gene flow between species. d) Geographic isolation and differences in the timing of mating are two mechanisms that allow populations to genetically diverge. e) Donkeys and horses are not species.
Which of the following best illustrates the concept of diminishing returns? Group of answer choices As more people are employed, total production of goods will diminish. As additional people are employed, the amount of additional goods produced will diminish. As total production of goods increases, a diminishing amount of labor is required. Each additional unit of output produced requires less additional labor.