Which of the following is NOT a domain in the three-domain system?
A) animalia
B) archaea
C) bacteria
D) eukarya
A
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The only organisms that perform photosynthesis are ones that produce some form of
A) chlorophyll or bacteriochlorophyll. B) carotenoids. C) phycoerythrin. D) phycocyanin.
Oversecretion of growth hormone in childhood results in
a. pituitary gigantism. b. acromegaly. c. pituitary dwarfism. d. diabetes insipidus. e. cretinism.
At the end of the first meiotic division, each chromosome consists of
a. chiasmata. b. a homologous chromosome pair. c. four copies of each DNA molecule. d. two chromatids. e. a pair of polar microtubules.
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