6. A drastic reduction in population size brought about by severe pressure is kn

Question

6. A drastic reduction in population size brought about by severe pressure is known as the: a. a founder effect b. gene flovw c. genetic drift d. bottle neck 7. A black bear population being fragmented and isolated by a newly constructed road is an example of: a. reproductive isolation b. gene flow c. genetic drift d. competition 8. A structural modification that enables an individual to exploit their habitat more efficiently is known as a: a. mutation b. homologous structure c. morphological convergence d. key innovation

Explanation / Answer

Answer:

6. Option d. Bottleneck effect

Bottleneck effect happens due to natural disasters. It shows drastic changes in population size.

7. Option C. Genetic drift

Genetic drift happens due to random incidences. We can thik of this road construction as random chance so decrease of the bear population.

8. Option d. Key innovation

In evolutionary biology, a key Innovation, also known as an adaptive breakthrough or key adaptation, is a novel phenotypic trait that allows subsequent radiation and success of a taxonomic group and helps to adopt easily.

9. Option C. Protista

These are eukaryotic organisms that are not animal, plant or fungus. But they do possess some features of eukaryotes.

10. Option C. Trichomonas and Giardia

Trichomonas:Trichomoniasis is caused by infection with a protozoan parasite called Trichomonas vaginalis.

Giardia: Causes giardiasis- infects gastrointestinal tract.

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