In what tissues can adult stem cells be found?
A) Stem cells are found only in embryonic tissues.
B) Adult stem cells can be found in bone marrow and the liver.
C) Stem cells can be found in any tissue that reproduces.
D) Adult stem cells are found in hair and fingernail tissues.
A
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A mineral deficiency is likely to affect older leaves more than younger leaves if the _____
A) mineral is a micronutrient B) mineral is very mobile within the plant C) mineral is required for chlorophyll synthesis D) mineral is a macronutrient E) older leaves are in direct sunlight
Which one of the following characteristics do animals, fungi, and protozoa have in common?
A) They obtain their carbon from carbon dioxide. B) They obtain their carbon from inorganic compounds. C) They obtain their energy and carbon atoms from chemicals. D) They obtain their energy from light.
Which best describes the source of B. cepacia infections?
a. Rice paddies b. Medical devices c. Oropharynx of animals d. Rodents
All of the following are mechanisms or adaptations of organisms to the arrival of colder
winter temperatures EXCEPT
a. hibernation. b. reduction in metabolic rates. c. migration. d. growth.