To reduce drag whales have eliminated
a. external ears.
b. pectoral fins.
c. external appendages.
d. mammary glands.
e. flukes.
A
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Toxic shock syndrome
A. is due to exotoxins produced by Streptococcus pyogenes. B. is due to exotoxins produced by Staphylococcus aureus. C. may spread from person to person. D. has a very low rate of recurrence, approximately 1%.
The reduced-bony-armor allele of the Eda gene is present in only about 1% of marine populations, but is predominant in freshwater populations of stickleback fish. What can we conclude?
_____ Bony armor increases fitness in the marine environment, but reduces fitness in the freshwater environment. _____ Freshwater fish with more bony armor have higher fitness than freshwater fish with less armor. _____ Bony armor is an environmentally-controlled trait, not a genetic trait. _____ The allele arose after the divergence of freshwater sticklebacks. _____ The freshwater environment caused a high rate of mutation in the DNA. 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 stickleback evolution? 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?
How do plumes affect an area? a. They allow more sunlight absorption
b. They remove the oxygen from the water. c. They create areas for high speed currents to pass. d. They create high amounts of suspended particles in the water column.
Which assisted reproductive technology involves the maturation and fertilization of the egg within laboratory glassware, followed by transfer of the embryo to the uterus 2-4 days later?
A. Surrogate mother B. In vitro fertilization C. Artificial insemination D. Intracytoplasmic sperm injection E. Gamete intrafallopian transfer