Which of the following are thought to have occurred because of the increase of oxygen (O2) in the atmosphere during and after the Silurian Period?
A. Conquest of land by arthropods.
B. Conquest of land by arthropods and vertebrates.
C. Increases in animal body sizes and conquest of land by plants.
D. Conquest of land by arthropods and vertebrates, and plants.
E. Conquest of land by arthropods and vertebrates and an increase in animal body sizes.
E. Conquest of land by arthropods and vertebrates and an increase in animal body sizes.
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Based on the intermediate disturbance hypothesis, a community's species diversity is increased by _____
A) frequent massive disturbance B) stable conditions with no disturbance C) moderate levels of disturbance D) human intervention to eliminate disturbance E) intensive disturbance by humans
Which of the following is the proper sequence for the three stages of aerobic respiration in
plants?
a. citric acid cycle, electron transport chain, glycolysis b. citric acid cycle, glycolysis, electron transport chain c. glycolysis, citric acid cycle, electron transport chain d. glycolysis, electron transport chain, citric acid cycle
If you were stranded in the Sahara Desert with very little water, you would likely die as a result of ____
a. dehydration only b. hyperthermia only c. hypothermia only d. dehydration and hyperthermia e. dehydration, hyperthermia, and hypothermia
Suppose you explored a new planet and found a photosynthetic organism unlike any on Earth. You
repeat Engelmann's classic experiment using this new organism in place of Spirogyra and find that oxygen-dependent bacteria cluster near the green and yellow portions of the spectrum. What does this tell you?
a. The sun of this new planet emits different wavelengths of light than our own. b. This new organism is using yellow and green light to drive photosynthesis. c. This organism is green just like plants on Earth. d. This organism utilizes the most energy-rich photons of the spectrum. e. This new organism is using blue and red light to drive photosynthesis.