A flagella stain was performed; no flagella were seen. Which of the following bacterium would be consistent with negative flagella stain result?
a. B. mallei
b. B. vesicularis
c. P. fluorescens
d. R. pickettii
A
B. mallei is nonmotile; thus, these organisms do not possess flagella. All other bacteria listed are motile by means of flagella.
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If blending inheritance was an accurate model of transmission genetics, which of the following would be true?
A. Variation in natural populations would remain the same over time. B. Variation in natural populations would increase over time. C. Variation in natural populations would decrease over time. D. Variation would increase in some populations, decrease in some populations, and remain the same in some populations. E. Mutation would not contribute to variation in natural populations.
A group of specialized cells of similar structure and function is a(n) ____
a. organ system b. cell cluster c. organ d. tissue e. organism
What part of the brain regulates core temperature?
a. hypothalamus b. cerebellum c. medulla oblongata d. thalamus
A basic difference between self-pollination and cross-pollination is
A. how often pollination occurs. B. where the pollen came from. C. whether insects are involved in pollination. D. the method of pollen delivery. E. whether the pollen germinated.