In gymnosperms and angiosperms, a plant embryo (young sporophyte) packaged with a food supply in a tough outer coat is a
A. sperm.
B. seed.
C. pollen grain.
D. gemmae.
E. fruit.
B. seed.
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Slow-growing NTM whose colonies produce no pigment, whether they are grown in the dark or the light, are referred to as:
a. scotochromogens. b. photochromogens. c. nonphotochromogens. d. chromogenicums.
Acid-fast organisms such as Mycobacterium tuberculosis contain ________ constructed from mycolic acids in their cell walls.
A. proteins B. peptidoglycan C. carbohydrates D. lipids
How does cytokinesis in plant cells differ from that of animal cells?
A. The endoplasmic reticulum forms a cell plate. B. Microtubules are constructed into a cell plate pattern. C. The Golgi apparatus produces vesicles that migrate along microtubules and fuse to make a cell plate. D. The plasma membrane divides by cytokinesis as in animal cells, and then secretes a cellulose cell wall.
In a mouse, the axis that determines the body pattern from the nose to the tip of the tail is
A. radial-medial. B. tip-tip. C. right-left. D. dorso-ventral. E. antero-posterior.