What would you find in the heart of an amphibian?
A. two atria and one ventricle
B. two atria and two ventricles
C. two atria and a partially divided ventricle
D. one atrium and one ventricle
E. one atrium and two ventricles
Answer: A
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You go to the movies with a friend, and he refuses to share your popcorn. He says that he heard that movie theatre popcorn is triploid. What is the most likely explanation for this?
A. Most corn is genetically modified by large agricultural companies. B. The buttery topping on movie theatre popcorn causes chromosomal abnormalities. C. Popcorn is made from a different species of maize than regular corn. D. All popcorn is triploid, because the starchy part of the kernel is triploid endosperm tissue. 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 seed structure? 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?
A bacterium containing sodium ions at a concentration of 0.1 mM lives in a pond that contains sodium
ions at 0.005 mM. Evidently, sodium ions are entering the cell by: a. active transport. b. endocytosis. c. diffusion. d. facilitated diffusion. e. osmosis.
What differentiates an organic compound from an inorganic compound?
a. An organic compound lacks isotopes. b. An organic compound contains carbon. c. An organic compound lacks valence electrons. d. An organic compound is basic rather than acidic. e. An organic compound contains two or more atoms
Which one of the following is NOT required for aerobic cellular respiration to take place?
A. enzymes B. NAD C. oxygen D. carbon dioxide