The "skeleton" of a typical sponge is composed of
a. bones.
b. cartilages.
c. spicules.
d. scales.
c
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Polyploidy is a common mechanism of sympatric speciation in
a. mammals in general. b. birds in general. c. rodents. d. plants. e. waterfowl.
Microarrays are created by robotically placing DNA on to a microscope slide and probing with
A. STSs from the tissue of interest. B. RNA from the tissue of interest. C. clone-by-clone sequencing. D. another DNA from the tissue of interest. E. SNPs from the tissue of interest.
Target nucleic acid amplification (polymerase chain reaction [PCR]) methods are based on:
a. the ability of two nucleic acid strands that have complementary base sequences to bond specifically with each other and form a double-stranded molecule. b. detecting phenotypic traits not detectable by conventional strategies. c. the principles of complementary nucleic acid hybridization with those of nucleic acid replication that are repeatedly applied through numerous cycles. d. determining the exact nucleotide sequence of a gene or gene fragment obtained from an organism.
What occurs in Duchenne muscular dystrophy?
a. muscle fibers break down b. motor neurons stop signaling muscle fibers c. actin filaments do not form d. myosin filaments do not form e. calcium does not leave the endoplasmic reticulum