The disease osteoporosis involves loss of both mineral and organic components from bones. Which of the following can contribute to the development of osteoporosis?
A. prolonged disuse of muscles
B. decline in estrogen following menopause in women
C. lack of calcium in the diet
D. lack of vitamin D in the diet
E. All of the choices for this question are correct
E. All of the choices for this question are correct
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Which statement is NOT true about
Monteverde Cloud Forest Reserve? a. It was purchased by a private individual. b. It is one of the few habitats left for jaguarand ocelot. c. It is home to more than 400 species of birds. d. There are only a few mammalian species still surviving in the Reserve. e. Ecotourism on the reserve provides employment to local people
Organisms that must rely on complex, high-energy molecules produced by other organisms for survival are
A) heterotrophs. B) producers. C) autotrophs. D) cyanobacteria. E) denitrifying bacteria.
Dr. Smith's parents have normal hearing. However, Dr. Smith has an inherited form of deafness. Deafness is a recessive trait that is associated with the abnormal allele d. The normal allele at this locus, associated with normal hearing, is D. Dr. Smith's
parents could have which of the following genotypes? A) DD and dd B) dd and dd C) Dd and Dd D) Dd and DD
The diagnostic procedure that images the structures of the blood vessels and the flow of blood through these vessels is known as _________ .
Fill in the blank(s) with the appropriate word(s).