The flow of ________ into ecosystems occurs in one direction only, while ________ are recycled within the ecosystem itself
A) minerals; energy compounds
B) genetic information; genotypes
C) organic compounds; minerals
D) energy; chemicals
Answer: D
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If R inhibits the enzyme catalyzing the M to N reaction, we call this
a. allosteric activation. b. allosteric inhibition. c. noncompetitive inhibition. d. competitive inhibition. e. either c or d, dependent on more information.
Witch hunts may have been set off by exposure to alkaloids produced by _____, which caused tremors, hallucinations, and illness
a. Candida albicans b. Epidermophyton floccosum c. Claviceps purpurea d. Histoplasma capsulatum
A squirrel population in an oak forest in Indiana is limited by hawk predators, the amount of acorns produced annually, nesting sites in the trees, and cold winter temperatures. Which of the following is an abiotic factor limiting this squirrel population?
A. the hawks in the region B. the number of acorns produced annually C. the stress of cold winter temperatures D. the number of available nesting sites
Meroblastic cleavage occurs in _____
A) sea urchins, but not in humans or birds B) humans, but not in sea urchins or birds C) birds, but not in sea urchins or humans D) both sea urchins and birds, but not in humans