Neuston is a term relating to small organisms of the:
a. intertidal zone.
b. benthic zone.
c. ocean surface.
d. abyssal zone.
e. aphotic zone.
C
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Which statement exemplifies the biological pump concept?
A) Autotrophs bring in light photons to synthesize ATP. B) Bacteria oxidize Fe2+ into Fe3+, and Archaea reduce Fe3+ back into Fe2+. C) Calcium ions are brought into cells while toxic physiological byproducts are released. D) Primary producers sink to the deep ocean, which provides deep ocean organisms with nutrients when the primary producers die.
Where would one expect to find the most telomerase?
A. male germ cells that give rise to gametes B. skin cells from a 60-year-old individual C. skin cells from a 2-year-old individual D. a nerve cell from a 60-year-old individual E. a nerve cell from a 2-year-old individual
Water that moves through nonliving regions of root, such as air spaces in root tissue, is following the ____
a. symplastic pathway only b. transmembrane and symplastic pathways c. transmembrane pathway only d. apoplastic, transmembrane, and symplastic pathways e. apoplastic pathway only
Which type of bioimaging technique is used to view the fine structures inside a chloroplast?
A. Transmission light microscope B. Compound light microscope C. X-ray crystallography D. Scanning electron microscopy E. Fluorescence microscopy