To analyze DNA in a single hair found at a crime scene, the ____ technique is used
a. DNA library
b. sequencing
c. genomic
d. DNA cloning
e. PCR
ANSWER: e
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The number one worldwide infectious diseases are ________.
A. respiratory diseases B. AIDS-related diseases C. malaria and other protozoan diseases D. measles and other rash diseases E. diarrheal diseases
In some parts of Africa, the frequency of heterozygosity for the sickle-cell anemia allele is unusually high, presumably because this reduces the frequency of malaria. Such a relationship is related to which of the following?
A) Mendel's law of independent assortment B) Mendel's law of segregation C) Darwin's explanation of natural selection D) the malarial parasite changing the allele
Which of the following statements about the insect exoskeleton is NOT true?
A. The insect exoskeleton grows with the organism. B. The insect exoskeleton has muscles attached to it from the inside of the body. C. The insect exoskeleton is made of a complex form of carbohydrate called chitin. D. The exoskeleton protects insects against predators and drying out. E. The insect exoskeleton is jointed and movable.
Plasma cells are derived from
A) macrophages. B) B cells. C) T cells. D) dendritic cells. E) neutrophils.