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anastassius [24]
4 years ago
5

Frederic Griffith discovered transformation in his experiments on mice and Pneumococcus bacteria. He injected the mice with comb

inations of harmless, R-strain bacteria and disease-causing S-strain bacteria. Which combination of bacteria killed the mice and showed that transformation occurred?
A.


heat-killed R-strain and live S-strain


B.


heat-killed S-strain and live R-strain


C.


heat-killed bacteria of both strains


D.


live bacteria of both strains
Biology
1 answer:
qaws [65]4 years ago
6 0

Answer: B. Rough strained and heat killed smooth strain kills mouse

Explanation:

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What factors influence gene flow between populations? 1. Differences in animal behavior and life history strategies can form eff
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Answer:

All these factors affect gene flow:

1. Differences in animal behavior and life history strategies can form effective barriers to gene flow.

2. The home range size of the specie can also serve as a barrier to gene flow.

Explanation:

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Gene flow can be affected by mobility or rate of dispersal. It is expected to be lower in species with low mobility which is the movement from one place to another or low dispersal and vice versa. So a population with a shorter home range size can't effective aid gene flow as they interact only with individuals of the same population and vice versa.

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Thanks.

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