Water moves through a plant by each of the following methods except
A. through the Casparian strip.
B. through the spaces between cells.
C. from cell to cell across plasma membranes.
D. through vessel members.
E. from cell to cell through plasmodesmata.
Answer: A
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In an agar dilution tube, microbial colonies grow
A) at the bottom of the tube. B) on the sides of the tube, although some may be at the surface. C) embedded in the agar, rather than growing on the surface. D) on the surface, but some creep down the sides away from the surface.
During which stage do cells of identical genetic makeup become structurally and functionally different from one another according to the genetically controlled developmental program of the species?
a. cleavage b. cell differentiation c. morphogenesis d. metamorphosis e. ovulation
After activation, these cells have the ability to move toward an enemy cell, press up against its surface, and make holes in it.
A. cytotoxic T-cells B. T-regulator cells C. antigen-presenting cell (APCs) D. B-cells
The angiosperm plant we see represents the ________ generation, and the flower produces ________
A) sporophyte; gametophytes B) sporophyte; bryophytes C) gametophyte; sporophytes D) gametophyte; bryophytes