Which carbohydrate is an important source of energy in most living species?
a. Glucose
b. Lactose
c. Fructose
d. Dextrose
a. Glucose
Glucose is an important source of energy in most living species.
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Aspergillus and Penicillium are related because
both a. produce antibiotics. b. reproduce sexually using ascospores. c. are club fungi. d. parasitize human mucous membranes. e. lack known sexual stages
Which of the following leukocytes kills its target cells, such as cancer cells or virus-infected cells, by releasing chemicals that break down the target cell membrane?
A) natural killer cells B) B lymphocytes C) basophils D) T lymphocytes E) macrophages
In the case of the peppered moths in England, when Kettlewell set up cameras to document that more white or black moths were eaten by birds on clean or sooty trees, he was verifying which factor involved in evolution by natural selection?
A. Some individuals are better adapted to a particular environment than other individuals. B. The organisms vary in traits and that these traits may be acquired during a lifetime. C. The variation is inherited. D. More young are born than can survive, so there will always be competition.
The rate at which wastes are produced by a cell partially depends on the cell's
A) ratio of surface area to volume. B) type of membrane. C) volume. D) surface area.