Answered: On a cool day, a crab (a poikilothermic…

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter15: Animal Evolution

Section: Chapter Questions

Problem 3CT

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Question

On a cool day, a crab (a poikilothermic animal) is sleeping on a rock and not consuming any food. Compare what happens to its mass over the next two hours on this cold day verses on a warm day?

Group of answer choices

Its mass will decrease faster on the colder day than on the warmer day because the crab must increase its respiration rate to warm its body.

Its mass will decrease slower on the colder day than on the warmer day because cellular respiration in the crab’s cells is occurring faster on the cold day.

Its mass will decrease slower on the cold day than the warm day because the crab will conserve its fat stores to survive the cold temperature.

Its mass will decrease the same amount on the colder as on the warmer day because the crab is not consuming food.

None of the above

Definition Definition Set of metabolic processes and reactions that produce energy from organic substances such as glucose. Cellular respiration takes place in the organism’s cells, where the chemical energy from nutrients or molecules of oxygen is converted into adenosine triphosphate (ATP). Cellular respiration that occurs in the presence of oxygen is called aerobic respiration; in the absence of oxygen, it is called anaerobic respiration.

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