Which of the following are true about ecosystems? (Check all that apply.)A) They contain both living and nonliving components.B) There is a transfer of energy through the system and some energy is lost as heat energy.C) Nutrients repeatedly cycle through the ecosystem.D) They represent the lowest level of biological organization.E) The ultimate source of energy for most ecosystems is the sun.
What will be an ideal response?
A, B, C, E
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In science, a theory is defined as ____
a. a speculative guess b. a hypothesis c. an explanation that is well documented and consistent with the evidence d. a description of a phenomenon for which there is no explanation e. a personal conviction
Which genetic change has yet to be linked to a disorder?
a. inversion. b. deletion. c. duplication. d. translocation. e. aneuploidy.
In what order do these layers occur in deep lakes in the temperate zone during the summer?
A. thermocline - epilimnion - hypolimnion B. hypolimnion - epilimnion - thermocline C. epilimnion - thermocline - hypolimnion D. epilimnion - hypolimnion - thermocline
Marathon runners are long-distance runners (marathons are races that are 26.2 miles long). Studies have shown that the muscles of marathon runners contain an abundance of slow-twitch muscle cells. Which of the following statements about these fibers is
true? A) Slow-twitch fibers have lots of mitochondria to make ATP aerobically. B) Slow-twitch fibers have lots of mitochondria to make ATP through fermentation. C) Slow-twitch fibers have few mitochondria and make ATP aerobically. D) Slow-twitch fibers have few mitochondria and make ATP through fermentation.