Wendy wants to know if a new sports drink improves physical performance. The number of push-ups each participant can complete in 1 minute is recorded first. The participants are then given 8 ounces of the sports drink, and the number of push-ups completed in 1 minute is recorded again. Wendy finds that the number of push-ups completed is less after consuming the new sports drink. This finding is likely the result of a effect.

Fatigue

Explanation:

Fatigue effect is when an individual's performance declines as a result of prolonged and demanding performance of a task. The individual becomes tired or bored with the activity.

In this scenario the participants had already done some pushups for one minute before taking the energy drink. The reduction in performance after taking the energy drink can be attributed to fatigue from doing the first set of pushups.

A better study would have allowed a time of recuperation in between bouts of pushups.

ans.

heterothermic organisms include those organisms that can switch between homeothermic (having body temperature higher than environment) and poikilothermic (having variation in internal body temperature) strategies.

some migratory birds show heterothermy as they decrease their metabolic rate during cold nights to keep their body temperature low. drop in metabolic rate allows increase in production efficiency of birds that reduces the internal body temperature to make it equal to external cold temperature during cold nights.

thus, the correct answer is 'birds allow their temperature drop in order to increase their production efficiency.'

answer; (a) searching for information can be done quickly;