The average heart beats approximately _________ times per minute.
a. 50
b. 75
c. 100
d. 125
Ans: b. 75
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Consider the data in Fig. 46.8 illustrating the age structure of France and India. In many parts of the world, the average age of reproductive maturity is increasing as humans move from urban to rural environments
Suppose that the current average age of first reproduction is 15 years in India and 20 years in France. How would a 5-year increase in the average age of reproductive maturity in both countries be expected to affect the per capita birth rate, and would this effect be greater in France or in India? A. increase in per capita birth rate, greater effect in India B. increase in per capita birth rate, greater effect in France C. decrease in per capita birth rate, greater effect in India D. decrease in per capita birth rate, greater effect in France
Based on the phylogeny shown, the group of species including (2-5) can best be described as a
A. clade. B. paraphyletic group. C. polyphyletic group. D. cladogram. E. synapomorphy 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 phylogenetic trees? 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?
Lobsters and clams have _____ in common with fishes
a. external gills b. a two-chambered heart c. internal gills d. skin as a respiratory surface e. an open circulatory system
What special feature of the ovum is facilitated by the production of polar bodies?
A. triploidy B. large size of the nucleus C. extra layers of plasma membrane D. large size of the cell