Explain why Mendel's work was groundbreaking
What will be an ideal response?
ANSWER: Mendel applied both the scientific method and mathematics to understanding the patterns of
inheritance in pea plants. His work explained the rules of genetics even before chromosomes
had been discovered, and while these rules have been refined, the fundamental rules of
genetics that he established are still considered to be valid today. He was ahead of his time in
his thinking, and his work was not well-known or appreciated until long after his death.
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Atoms of a single element that possess different numbers of neutrons are called:
A. isomers. B. polymers. C. ions. D. isotopes. E. monomers.
What mechanisms do ectothermic animals have for thermoregulation? Check all that apply.
_____ countercurrent heat exchange _____ changing the rate of heat production by muscular activity _____ changing the rate of heat loss by vasodilation and vasoconstriction _____ relocating to warm areas when too cold, or to cooler areas when too hot _____ insulation in the form of feathers or fur
Which animal has the least advanced nerve cord?
a. chordate b. arthropod c. flatworm d. human e. octopus
Which of the following elements is (are) likely
to provide hints about earth's early atmosphere?
a. ancient rocks b. volcanic eruptions c. ancient rocks and volcanic eruptions d. meteorites and ancient rocks e. meteorites, volcanic eruptions, and ancient rocks