LIFE SCIENCE

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OBJECTIVE LIFE SCIENCE

EVOLUTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Two populations of different bird species were studied. It was found that there were 57 genetic differences found in species A and 37 differences in species B. Which species is more likely to survive as the environment changes?
A
Species A, because more genetic variation increases the chances that some members survive
B
Species B, because fewer genetic variation increases the chances that some members survive
C
They will have the same chances for survival because survival is random
D
It is impossible to tell from this information
Explanation: 

Detailed explanation-1: -Genetic variation describes naturally occurring genetic differences among individuals of the same species. This variation permits flexibility and survival of a population in the face of changing environmental circumstances.

Detailed explanation-2: -An increase in species diversity can also affect the genetic diversity, and do so differently at different levels. If there are many species, the genetic diversity at that level will be larger than when there are fewer species. On the other hand, genetic diversity within each species can decrease.

Detailed explanation-3: -The correct answer is Genetic diversity. Genetic variation between distinct populations of the same species is known as Genetic diversity.

Detailed explanation-4: -Without genetic variation, a population cannot evolve in response to changing environmental variables and, as a result, may face an increased risk of extinction. For example, if a population is exposed to a new disease, selection will act on genes for resistance to the disease if they exist in the population.

There is 1 question to complete.
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