Which evolutionary plant innovation eliminated the need for sperm to swim through water to fertilize an egg, resulting in plants being truly adapted for reproduction on land?
A) pollen B) independent gametophyte
C) rhizoids D) fruit
Answer: A
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Which term best describes the type of membrane protein in the figure?
A) peripheral B) external C) internal D) integral
Temperature, salinity, and sediment composition are all examples of what?
a. Abiotic factors b. Environment c. Anaerobic factors d. Biotic factors
Dalton's Law states that:a
the amount of a gas that diffuses across a membrane depends on the differences in the gas' partial pressure. b. the ability of hemoglobin to bind oxygen depends on the partial pressure of oxygen. c. in a mixture of gases, the total pressure of the mixture is the sum of the pressures of the individual gases. d. pH causes a displacement of the oxygen-hemoglobin dissociation curve. e. as the concentration of chloride ions increases, the ability of hemoglobin to bind carbon dioxide decreases.
One major function of the kidneys is water conservation. What portion of the nephrons is responsible for that function when water is lacking in the diet?
A. collecting duct B. loop of Henle C. glomerulus D. Bowman's capsule