Biogeochemical cycles are the cycles of
A. all nutrients.
B. nutrients that can be limiting for organisms.
C. nutrients limiting only to plants.
D. only those nutrients cycling only within organisms.
E. None of these choices are correct.
A. all nutrients.
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A botanist examines two plants. Plant A has large colorful petals; plant B has extremely tiny white flowers. Which one is most likely animal pollinated?
A. Plant A B. Plant B 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 animal-pollinated plants? 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?
Which statement correctly describes horizontal gene transfer?
a. Conjugation, transformation and transduction are all forms of horizontal gene transfer. b. Conjugation and transformation are forms of horizontal gene transfer, but transduction is a form of vertical gene transfer. c. Eukaryote-eukaryote transfers of nuclear genes are most common. d. Prokaryote-eukaryote transfers of nuclear genes are most common. e. Partial diploids always result from horizontal gene transfer.
What kinds of bonds link the two strands of a double helix to each other?
A. hydrogen B. ionic C. hydrophobic D. covalent
While staining a mixed culture of Gram-positive and Gram-negative bacteria, switching the order of steps 2 and 3 would result in ______________________.
a. all bacteria appearing purple b. all bacteria appearing clear c. all bacteria appearing pink d. a change in the Gram reaction; Gram-negative cells would appear purple while Gram-positive cells would appear pink.