Which of the following substances is commonly used to inactivate microbes?
A) formaldehyde
B) alcohol
C) synthetic detergents
D) fluorescent dyes
E) alum
A
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The release of chemical signals into the extracellular fluid to affect nearby target cells is an example of ____ regulation
a. autocrine b. endocrine c. paracrine d. systemic e. exocrine
Homeotic genes
a. cause lethal mutations. b. regulate development of specific body parts. c. are found only in fruit flies, where they are responsible for odd placement of appendages. d. produce "fate maps." e. form as blocks of genes in cells randomly distributed throughout the body
Glucose enters cells by
A. osmosis. B. diffusion. C. active transport. D. receptor-mediated endocytosis. E. facilitated transport.
Remember that color is an inherited trait in beetles. Which of the following is an example of natural selection?
A. Green beetles leave more offspring than brown beetles because they are better at finding food. B. Green beetles migrate out of the population. C. Green beetles and brown beetles always leave the same number of offspring. D. A storm kills more green beetles than brown beetles by chance. E. Green beetles migrate out of the population, and brown beetles migrate into the population.