In the fall of 2006, which of the following
pollinators started declining due to several
factors?
a. butterflies
b. moths
c. honeybees
d. mosquitoes
e. night feeding bats
C
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PKU is a human disease in which the affected
individual is unable to metabolize the amino acid, phenylalanine. Symptoms of this disease include mental retardation, a lack of pigmentation, and black urine. PKU is an example of
a. epistasis. b. pleiotropy. c. incomplete dominance. d. co-dominance. e. complete dominance.
The area labeled "A" is
a. a nucleus. b. chromatin. c. endoplasmic reticulum. d. a vacuole. e. a nucleolus
A genetic disease causing an abnormal attachment of muscles to the bones of the little finger is
a. syndactyly. b. polydactyly. c. campodactyly. d. multidactyly. e. extradactyly.
The hydrogen and oxygen atoms of a water molecule are held together by ________ bonds
A) ionic B) hydrogen C) covalent D) polar