Which of the following statements best justifies the use of the experimental results in an investigation of interspecies competition?

(A) When two populations use different sources of energy, one of the populations will thrivein a shared environment and the other will become extinct.
(B) When two populations use the same sources of energy, resource availability in a shared environment limits the growth of both populations.
(C) Because the change in entropy of a system containing two different species is always positive, populations typically grow fasterin shared environments.
(D) Because the free energy of a system containing two different species is always negative, populations that utilize similar resources cannot coexist in nature.


Answer: (B) When two populations use the same sources of energy, resource availability in a shared environment limits the growth of both populations.

Biology & Microbiology

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Biochemicals, known as __________, are produced by glands, travel through the bloodstream, and alter the metabolism of specific target cells.

A. enzymes B. pheromones C. neurotransmitters D. hormones E. pectines

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The control in an experiment

a. makes the experiment valid. b. is an additional replicate for statistical purposes. c. reduces the experimental errors. d. minimizes experimental inaccuracy. e. allows a mixed group of comparisons among different organisms for the experimental group.

Biology & Microbiology