Day-neutral plants are
a. short-day plants.
b. able to bloom when they are mature enough.
c. night-blooming plants.
d. triggered to bloom by cold weather.
e. none of these.
Answer: b
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What general type of tissue is characterized by few cells, separated by a nonliving extracellular matrix?
A) epithelial tissue B) connective tissue C) muscle tissue D) nervous tissue E) organ tissue
Why are modern light microscopes better than the ones Leeuwenhoek used?
A) Modern microscopes have a fivefold better resolution. B) Modern microscopes are compound instead of simple. C) Modern microscopes have lenses with smaller numerical apertures. D) Modern lenses are made of prisms. E) Modern microscopes are compound and have fivefold better resolution.
John Snow's research during a cholera outbreak in London laid the foundation for which of the following branches of microbiology?
A) infection control only B) epidemiology only C) immunology only D) both infection control and epidemiology E) infection control, epidemiology, and immunology
All of the following statements help to explain why water molecules form hydrogen bonds except:
a. Water is an electronegative molecule. b. The electrons spend more time around the oxygen atom because oxygen is more electronegative than hydrogen. c. There is a partial positive charge on each hydrogen atom and two partial negative charges on the oxygen atom in a water molecule. d. Attractions form between opposite partial charges.