Which statement about radioisotopes is FALSE?
a. Potassium-40 has an extremely long half-life.
b. Carbon-14 is typically used to date sedimentary rock.
c. The ratio of carbon-14 to carbon-12 is used in dating fossils.
d. The half-life of a radioisotope does not vary with temperature or pressure.
e. The nucleus of a radioisotope can change into that of a different element during decay.
b
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Sucrose is composed of:
a. a molecule of glucose and galactose. b. two molecules of glucose. c. a molecule of glucose and a molecule of fructose. d. a molecule galactose and fructose. e. two molecules of fructose.
How is the grasshopper mouse able to consume the Eleodes longicollis beetle?
a. The grasshopper mouse avoids the undesirable secretions by burying the beetle's abdomen. b. The grasshopper mouse has cryptic coloration so that the beetle does not notice him. c. The grasshopper mouse is immune to the beetle's toxins. d. The grasshopper mouse poisons the beetle first. e. The grasshopper mouse uses heat detectors to easily locate the beetle.
What bathygraphic feature is sometimes thought to be created by turbidity currents in the ocean?
a. Abyssal plains b. Sea mounts c. Submarine canyons d. Ocean basins
What is a key characteristic of exergonic reactions?
a. They consume energy. b. They require glucose fusion. c. Their products have more energy than the reactants. d. They convert some energy to less biologically useful forms. e. They involve the formation of bonds.