Indicate whether each of the statements below is True or False (Enter 1 for True
ID: 185672 • Letter: I
Question
Indicate whether each of the statements below is True or False (Enter 1 for True and 2 for False) Genetic drift is the main source of new variation on which natural selection acts. The biological species concept defines species on the basis of whether interbreeding is possible or not. If 100 flies are exposed to a pesticide, it is likely that at least one of them will become resistant to the chemical Natural selection is the only known mechanism that can produce adaptations. For species that do not reproduce sexually, it is necessary to use the budding species concept. 1. True 2. FalseExplanation / Answer
1. Genetic drift is the main source of new variation on which natural selection acts.
The answer is False (2).
Explaination:
There are four main sources of new variations which includes mutation, genetic drift, gene flow and natural selection.
2. The biological species concept defines species on the basis of whether interbreeding possible or not.
The answer is true (1).
Explaination:
The biological species concept defines species as members of populations that actually or potentially interbreed in nature not according to the similarity of appearance.
3. If 100 flies are exposed to a pesticide, it is likelt that atleast one of them will become resistant to chemical.
The answer is False (2).
Explaination:
It depends to a great extent on the extent of dose and severity to exposure.
4. Natural selection is only known mechanism that produces adaptations.
The answer is True by definition (1)
Explaination:
Adaptations in evolutionary biology means any evolution in a population that is pushed by natural selection. So, by definition the answer is True.
But the evolution is influenced by other factors than natural selection such as genetic drift, gene flow and mutations.
5. For species that do not reproduce sexually, it is necessary to use the budding species concept.
The answer is False (2).
Explaination:
The species that do not reproduce sexually, they propagate through the asexual reproduction which includes binary fission, multiple fission, parthenogenesis, etc.