Unlike other microbes, archaea are able to thrive:
a. in all the same places that bacteria are found.
b. in lakes and rivers (i.e., fresh water).
c. in well-aerated soils.
d. in very extreme environments.
e. in the human body.
Ans: d. in very extreme environments.
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To your chagrin, you and your labmate have discovered that you both labeled your petri dishes “A”, “B”, and “C”. How can you distinguish your sea urchin gastrula embryos from her frog gastrula embryos?
A. Unlike frogs, sea urchins are deuterostomes which form the anus first and the mouth second. B. Sea urchin cells migrate inside to form the archenteron, whereas in frogs proliferation of dividing cells from the dorsal lip populate the inside of the embryo. C. Sea urchins have relatively yolk-poor eggs with similar animal and vegetal poles, whereas frogs have large amounts of yolk distinguishing the vegetal pole from the animal pole. D. Frogs have an animal pole and vegetal pole, whereas urchins have only a vegetal pole. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about eggs? What other information is related to the question? Choose Answer Given what you now know, what information 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?
Ovulation
A) is the process in males that produces sperm. B) occurs on the first day of the menstrual cycle. C) results in the release of a mature egg. D) occurs in the oviducts.
Which factor is most critical for organisms to facilitate social behavior?
a. There must be a large population. b. All present must be of the same species. c. All present must have the same genetic imprinting. d. There must be a mechanism for communication. e. No outsiders can be allowed to enter the group.
Pasteur
A. employing a swan-neck flask. B. being the first researcher to work under sterile conditions. C. demonstrating the synthesis of organic molecules. D. showing that maggots arise from eggs laid by flies.