You discover a primate fossil while on an expedition in Africa. Which part of the skeleton should be examined to classify this fossil as a human or a nonhuman primate?
A) the hand bones
B) the base of the skull
C) the ribs
D) the backbone (vertebrae)
B
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The finding that homeotic genes are present in both mammals and insects indicates that these genes must
A. control the same traits. B. be on the same chromosomes. C. have arisen very early in the evolutionary history of animals. D. have developed independently and simultaneously. E. have been transmitted into mammals by an insect bite. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about homeotic genes? Consider Possibilities · Consider the different answer options. Which can you rule out? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? 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?
Examples of transgenic organisms include:
A. crop plants engineered to resist insect pests. B. rice enriched with vitamin A. C. sheep that produce a human protein in their milk that is used to treat emphysema. D. laboratory mice that develop heart disease and diabetes. E. All of the answer options are correct.
Cultures for isolation of Campylobacter jejuni and Campylobacter coli should be incubated in:
a. a capnophilic atmosphere at 42°C and examined at 24 and 48 hours. b. a microaerophilic atmosphere at 35°C and examined at 24 and 48 hours. c. regular room air at 35°C and examined at 48 and 72 hours. d. a microaerophilic atmosphere at 42°C and examined at 24 and 48 hours.
Viral infections in plants _____
A) can be controlled with antibiotics B) can spread within a plant via plasmodesmata C) have little effect on plant growth D) are not spread by animals