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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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.
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