How many origins of replication does the E. coli chromosome contain?
A) none
B) 1
C) 2
D) 3
E) many
B) 1
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Which of the following is most likely associated with the evolution of mating systems?
A) population density B) territoriality C) certainty of paternity D) sexual dimorphism
Which of the following subatomic particles live within the nucleus of an atom?
a. protons only b. neutrons only c. electrons only d. protons and neutrons
Why is an open circulatory system less efficient than a closed circulatory system?
A. Metabolic wastes cannot be removed from tissues in an open circulatory system. B. There is no heart to pump the blood in an open circulatory system. C. It is more difficult to quickly deliver O2 to specific tissues when needed with an open circulatory system. D. Open circulatory systems lack respiratory pigments that bind to oxygen. E. Blood cannot be used to transport nutrients in an open circulatory system. 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 open circulatory systems? 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?
During phagocytosis, what may fuse with the vacuole to further degrade the ingested material?
a. ligand b. receptor c. lysosome d. phosphate e. desmosome