homeostasis
What will be an ideal response?
ability to maintain constant internal conditions in face of varying external environment
Salt, water, heat
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Anaphylactic shock can be controlled by an immediate injection of histamine
a. True b. False
The sources of genetic variation during meiosis are:a
crossing-over and the random assortment of maternal and paternal chromosomes. b. crossing-over and random pairing of tetrads. c. random pairing of tetrads and mutations. d. polyploidy and random pairing of tetrads. e. random pairing of tetrads and random assortment of maternal and paternal chromosomes
During a study session about evolution, one of your fellow students remarks, "The giraffe stretched its neck while reaching for higher leaves; its offspring inherited longer necks as a result
" Which statement is most likely to be helpful in correcting this student's misconception? A) Characteristics acquired during an organism's life are generally not passed on through genes. B) Spontaneous mutations can result in the appearance of new traits. C) Only favorable adaptations have survival value. D) Disuse of an organ may lead to its eventual disappearance.
If an unknown streptococcal sample yields a positive CAMP test, which organism should you suspect?
A) S. pyogenes B) S. agalactiae C) S. pyogenes D) S. pneumonia