In pine trees, the immature male gametophyte
is
a. a megaspore.
b. the embryonic pine seed.
c. a pollen grain.
d. a megasporangium.
e. a microspore
C
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A factor in the development of multidrug-resistant strains of Mycobacterium tuberculosis is that
A. many TB patients live in less-than ideal circumstances. B. the daily multidrug regimen lasts up to 9 months. C. multiple antibiotics must be taken in the daily regimen. D. All of the above contribute to the development of resistant strains of Mycobacterium tuberculosis.
Which of the following is true concerning root
nodules? a. They may kill a plant. b. They are produced by a fungus. c. They remove nitrogen compounds from the plant. d. They convert the harmful ammonia that plant cells produce into gaseous nitrogen. e. None of these are true.
Describe how microbes build large biomolecules from either (1) the products of catabolism (i.e. in heterotrophy) or (2) the fixation of CO2 (i.e. in autotrophy). What is the role of ATP and reducing equivalents like NADH/NADPH?
What will be an ideal response?
Which of the following statements is false?
a. Sensory receptors are able to detect specific stimuli only. b. Sensation is an awareness of a change in external or internal conditions. c. A stimulus will generate impulses that are different depending on where the signals are sent in the brain. d. Information about a stimulus is coded in the quantity and frequency of action potentials sent to the brain. e. Specific regions of the brain translate the information about the signal and convert it into a sensation.