Which statement is an example of a beneficial mutation?
A. A fawn in the forest has a mutation that causes its fur color to be white.
B. A person has a mutation that causes her earlobes to be attached to her head.
C. A person has a mutation that causes him to be unable to fully digest lactose.
D. A mosquito has a mutation that causes it to be more resistant to pesticides.
ANSWER ASAPPPP
D. A mosquito has a mutation that causes it to be more resistant to pesticides.
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To gather information about the elk population, biologist marked 75 elk. Later, they flew over the region and counted 250 elk, of which 15 were marked. What is the best estimate for the elk population?
Responses
A 1,3001,300
B 1,2501,250
C 1,3501,350
D 1,200
The best estimate for the elk population can be calculated as follows:
(No. of marked elk in first sample * Total no. of second sample) / No. of marked elk in second sample = (75 * 250) / 15 = 1250
Therefore, the best estimate for the elk population is B. 1,250.
To determine which statement is an example of a beneficial mutation, we need to understand what a beneficial mutation is. A beneficial mutation is a genetic change that provides an advantage to an organism, increasing its chances of survival or reproductive success.
Now, let's analyze the given options:
A. A fawn in the forest has a mutation that causes its fur color to be white. - This mutation may or may not provide an advantage depending on the environment. In some cases, a white fur color might help the fawn blend into its surroundings and avoid predation, which could be considered beneficial. However, in other environments where the predominant predators are not visually oriented, this mutation may not provide any advantage.
B. A person has a mutation that causes her earlobes to be attached to her head. - This is a neutral mutation because it does not confer any particular benefit or disadvantage to the person. The attachment or absence of earlobes has no substantial effect on survival or reproductive success.
C. A person has a mutation that causes him to be unable to fully digest lactose. - This is generally considered a disadvantageous mutation, as lactose intolerance can cause digestive issues when consuming milk or milk products.
D. A mosquito has a mutation that causes it to be more resistant to pesticides. - This is an example of a beneficial mutation. Mosquitoes with this mutation are more likely to survive exposure to pesticides, which increases their chances of reproducing and passing on this resistance to future generations.
Based on the definitions and analysis, the statement that represents a beneficial mutation is D. A mosquito has a mutation that causes it to be more resistant to pesticides.