Complex structures called fruiting bodies are a characteristic of
A. Clostridia.
B. myxobacteria.
C. Streptomyces.
D. lactic acid bacteria.
B
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Which of the following statements about evolution of behavior is correct?
A) Natural selection will favor behavior that enhances survival and reproduction. B) An animal may show behavior that minimizes reproductive fitness. C) If a behavior is less than optimal, it will eventually become optimal through natural selection. D) Innate behaviors cannot be altered by natural selection.
The parasite Plasmodium reproduces in which cells of the human body?
a. brain b. digestive tract c. kidney d. red blood cells and liver e. white blood cells
Which one of the following is TRUE regarding the flow of energy through an ecosystem?
A) Energy flows from the sun to consumers and then to producers. B) Energy flows in multiple directions through an ecosystem. C) Energy is cycled through an ecosystem and rarely lost as heat. D) Energy flows from the sun to producers and then to consumers. E) As energy flows through an ecosystem, it does not change form.
The first cell that was seen under a microscope was a
a. blood cell. b. skin cell. c. cork cell. d. sperm cell. e. root tip cell.