Which of the following is not a characteristic shared by all chordates at some point in their life cycle?
a. possession of a coelom
b. three primary cell layers
c. dorsal tubular nerve cord
d. pharyngeal gill slits
e. vertebrae
E
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In order to lose weight and reduce body fat, a friend of yours has decided to eliminate all fat from his diet, while consuming unrestricted amounts of carbohydrates. What do you think of this idea?
A. It is a good idea, because if your friend doesn't eat any fat, he cannot store any additional fat. B. It is a bad idea, because consumption of fat is required to provide cofactors for the electron transport chain. C. It is a good idea, because under conditions where ATP levels are low in cells, carbohydrates will be stored, and fat stores will be catabolized via beta-oxidation to generate energy. D. It is a bad idea, because if ATP levels are high in cells, excess acetyl-CoA from the metabolism of carbohydrates can be used for fatty acid synthesis. 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 consuming carbohydrates and weight loss? Is excessive carbohydrate intake a good or bad idea? What other information is related to the question? Choose Answer Do you have all the information needed to determine whether or not excessive consumption of carbohydrates will help or harm your friend? Reflect 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?
What is the general term for a state in which two organisms live together in close association?
a. parasitism b. symbiosis c. mutualism d. commensalism
Which of the following are homologous?
A) the forelimb of a dog and the hindlimb of a cat B) the forelimb of a dog and the forelimb of a cat C) wings of a butterfly and wings of a sparrow D) the mouth of a mosquito and the beak of a hummingbird
The normal microbiota of the lower urethra may show
A. Lactobacillus. B. Staphylococcus. C. Corynebacterium. D. Bacteroides. E. All of the choices are correct.