Which of these factors plays the most significant role in natural selection during times of food scarcity?
A. Behavioral isolation
B. Genetic drift
C. Competition
D. Reproductive isolation
2007-07-24 16:46:13 · 5 answers · asked by ♥Anonymous♥ 2 in Science & Mathematics ➔ Biology
C. Competition
2007-07-24 17:10:56 · answer #1 · answered by Anonymous · 1⤊ 0⤋
C
But you really need to try and figure these out. Asking on Yahoo won't help you learn to understand; you'll just memorize. You need to know the material, not the answers.
A: wrong; behavioral isolation isn't a term I've heard before, but it suggests that individuals break off from the group. That would not help them get food. To get food, it would be better to form units to fight for the food.
B: no; genetic drift is a change in allele frequency (and consequently genotype frequency) due to stochastic and random events, like earthquakes or disease
D: wrong. You could argue that it would be a factor - less food should lead to less breeding, so that there are fewer mouths to feed - but it's certainly not as important as competition.
Competition is right for the reason ecolink said above.
2007-07-25 00:02:58 · answer #2 · answered by Sci Fi Insomniac 6 · 0⤊ 1⤋
If there isn't enough food, then there's more competition for the food that exists.
2007-07-24 23:57:29 · answer #3 · answered by ecolink 7 · 1⤊ 1⤋
competition
2007-07-24 23:52:22 · answer #4 · answered by sin2acos2a1 2 · 1⤊ 1⤋
i had this exact question on a test..
i think its C
2007-07-24 23:50:57 · answer #5 · answered by Anonymous · 1⤊ 1⤋