The functional unit of the kidney is the
(a) renal pelvis.
(b) ureter.
(c) cortex.
(d) nephron.
(d) nephron.
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Why is fire-suppression in chaparral habitats not a good strategy for protecting species in this biome?
1.It prevents seeds of plants from sprouting if there is no fire to score the seed. 2.It prevents patches from opening up for succession to take place. 3.It prevents nutrients from being released into the soil. 4.It prevents larger trees from dying to create more space for new individuals.
Active transport ________.
utilizes energy cannot transport molecules against a concentration gradient cannot be saturated requires cofactors
Most bacterial species grown in the laboratory are grown at temperatures between
A) 5° and 10° C. B) 10° and 20° C. C) 20° and 40° C. D) 40° and 90° C.
The experiments that clearly distinguished DNA and not protein as the hereditary material were conducted by _____.
A. Pauling B. Hershey and Chase C. Griffith D. Watson and Crick E. Avery