Teri brings her husband, Liam, with her to the gym and signs them both up for a one-hour aerobics class. After 20 minutes, Liam is visibly fatigued, even though he is a regular at the gym, lifting weights and playing basketball
What might explain why he is fatigued while his wife, although working hard, is not struggling? A) Females use more fat for energy and endurance exercises.
B) Males have very little fat from which to obtain energy during endurance exercises.
C) Males are better at team sports than at individual exercise programs.
D) Teri's husband must not have eaten before coming to the gym.
A
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Platys and swordtails are related tropical freshwater fish. In studies, researchers have shown that female platys prefer males with swordtails, even though males of their own species do not have them. This was discovered by attaching artificial swordtails to platys males.What does this suggest about the origin of the swordtail feature?
A. Female preference for swords may have predated the origin of the feature itself. B. Evolution of swords later led to evolution of female preference for swords. C. The same gene that causes sword development also causes development of neural circuits for female preference. D. Adjacent genes on the same chromosome cause sword development and development of neural circuits for female preference. Clarify question: What is the key concept addressed by the question? What type of thinking is required? Gather Content: What do you already know about the evolutionary origins of a characteristic involved in sexual selection? What other information is related to the question? Choose Answer: Given what you now know, what information is most likely to produce the correct answer? Reflection on Process: Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Select the correct association.
A. proteins-have three forms: monosaccharides, disaccharides, and polysaccharides B. carbohydrates-provide the body with an immediate source of energy C. carbohydrates-composed of amino acids bound together with peptide bonds D. lipids-structural components of hair, fingernails, and claws E. proteins-make up the bulk of the plasma membrane of cells
Briefly discuss mechanisms that ectotherms can use to regulate their body temperature. What will be an ideal response?
What is the steep and sudden decline in a population size as birth rates plummet and death rates soar?
A) carrying capacity B) a "boom and bust" cycle C) demographic momentum D) a population crash