Upon observing a cell of a grass blade, you notice a prominent sac that occupies a large portion of the cell. Which
organelle is this?
a. nucleus
b. vacuole
c. lysosome
d. chloroplasts
e. mitochondria
b
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The question(s) below are included here for courses that are structured to include written exercises. This may also serve as an exercise for a recitation or discussion section where students work alone or in groups on more difficult conceptual problems
Core Concept 21.6 is also covered in other suites for the chapter, so these questions can be left out if they are not appropriate for your course. What are the fates of new mutations in DNA sequence? What forces are primarily responsible for determining the fate of a new mutation? What will be an ideal response?
Azolla filiculoides is a small aquatic fern that is typically 1-2 cm tall. How would a botanist distinguish it from a bryophyte?
A. It produces seeds. B. It has xylem tissue. C. It has a gametophyte. D. It has chloroplasts. 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 ferns and bryophytes? What other information is related to the question? 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?
Glyptodonts are fossil forms that resemble
a. ostriches. b. armadillos. c. kangaroos. d. turtles. e. sloths.
An animal with an open circulatory system
a. lacks a continuous network of blood vessels that contain the blood at all times. b. can have only one heart. c. has two separate vascular circuits. d. is able to distribute substances faster than a closed system. e. can grow larger than one with a closed circulatory system.