In which condition must the eye often be removed to prevent the spread of the disease?
a. conjunctivitis
b. malignant melanoma
c. retinoblastoma
d. macular degeneration
e. herpes infection
ANSWER: c
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A previously unknown animal is being studied so that it can be classified. It is an invertebrate, triploblastic, dorsoventrally flattened, acoelomate, and has flame cells. Which phylum would you place it in?
A. Platyhelminthes. B. Mollusca. C. Arthropoda. D. Cnidaria.
The allele for albinism (c) is recessive to the allele
for normal pigmentation (C). A normally pigmented woman whose father is an albino marries an albino man whose parents are normal. They have three children, two normal and one albino. Give the genotypes for each person listed. What will be an ideal response?
Females of various species shop around for males
that a. have the best burrows. b. offer superior nuptial gifts. c. make showy displays. d. include all of these. e. include none of these.
Phylogenetic analysis of DNA extracted from material collected by air samplers in the New York City subway system showed that its microflora were MOSTLY composed of organisms associated with
a. human skin. b. soil. c. outdoor air. d. dust.