This phylum of nonvascular plants has about 10,000 known living species, including those in the
genus Sphagnum, a peat moss used by humans for its absorbent property and also as a fuel.
a. Hepatophyta
b. Pterophyta
c. Bryophyta
d. Lycophyta
e. Anthocerophyta
C
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The ascending portion of the loop of Henle is
A. permeable to water and impermeable to sodium. B. permeable to water and permeable to sodium. C. impermeable to water and permeable to sodium. D. impermeable to water and impermeable to sodium. E. the site of active transport of water.
The milk of cetaceans is very rich in:
a. fat. b. protein. c. carbohydrates. d. cellulose. e. DNA.
Blood is prevented from back flowing in veins
because of
a. high pressure flow. b. rapid diffusion. c. one-way valves. d. suction from the lungs. e. the pulsing of the veins.
Communication between animal cells is facilitated by
A) tight junctions. B) gap junctions. C) adhesive junctions. D) plasmodesmata. E) gap and adhesive junctions.