Which of the following states that changes in species composition are orderly and predictable during succession?
1.The facilitation hypothesis
2.The inhibition hypothesis
3.The tolerance hypothesis
1
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Many metabolic pathways are ultimately concerned with ATP; either with the generation of ATP, or with the requirement of ATP for that pathway to function. Why is ATP so important to metabolism?
A. Hydrolysis of ATP is used to drive exergonic reactions B. Hydrolysis of the bond between adenine and ribose in ATP is commonly used to release energy that can be used to drive other cellular reactions C. The phosphate groups of ATP are held together by unstable bonds that can be broken to release energy D. ATP is a protein that serves as the energy currency of cells
Conservation biologists are often concerned that when the population size of an endangered species becomes too small, it is at risk of extinction for which reason?
A. They are at risk of sympatric isolation. B. They can no longer evolve. C. They may be more susceptible to changes in the environment or disease. D. They are at risk of developing prezygotic barriers to reproduction. E. Their rate of breeding will decline.
Light travels from space to earth
a. in circle lines. b. in straight lines. c. in waves. d. in circle and straight lines. e. in circle lines and in waves
Connor decides to celebrate his 21st birthday by drinking a few beers at a local sports bar. After a while, Connor notices that he is making many more trips to the men's room than the week before when he drank similar amounts of carbonated water. Why is that?
A. Alcohol inhibits reabsorption of sugars, amino acids and other small metabolites, which decreases reabsorption of water. B. Alcohol stimulates secretion of ions into the nephron and water follows by osmosis. C. Alcohol inhibits the secretion of ADH by the posterior pituitary gland, thereby decreasing water reabsorption. D. Alcohol stimulates filtration of the blood plasma by the glomeruli. E. Alcohol stimulates the insertion of aquaporins into the plasma membranes of cells that line the collecting ducts, thereby decreasing water reabsorption.