Endospores are
A. resistant to destruction by radiation.
B. metabolically inactive.
C. living structures.
D. resistant to heat and chemical destruction.
E. All of these choices are correct.
Answer: E
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Which of the following tests allows the separation of cells according to their sizes, densities, and surface markers tagged by specific fluorescent antibodies?
A. Western blot B. ELISA C. Fluorescence-activated cell sorter D. FA test on a microscope slide
The net diffusion of water across a selectively permeable membrane is
a. facilitated diffusion. b. active transport. c. laminar flow. d. carrier moderated diffusion. e. osmosis
Which of the following is an incorrect statement?
A) A large leaf maximizes light interception. B) A deeply lobed leaf minimizes heat exchange with the atmosphere. C) A thick leaf reduces loss of water via transpiration. D) A leaf with a high SLA is generally thin and flexible.
Which two plant hormones are mainly responsible for leaf abscission?
a) Auxin and ethylene b) Gibberellic acid and auxin c) Ethylene and brassinosteroids d) Brassinosteroids and strigolactones e) Strigolactones and jasmonates