Populations of organisms that exhibit a high degree of variation have a greater chance for survival than populations of organisms that show little variation. this statement is

always true.

usually true.

rarely true.

never true.

The answer is B. The answer cannot be always true in biology especially with regards to probability statistics such as those in this question. Nonetheless, increased variation in a population provides a wide base for selection pressures of natural selection to act upon. This way, there are high chances of adaptation of the population to an environmental change or calamity.