Earthworms show all of the following features except
A. containing distinct head regions and parapodia.
B. containing touch-sensitive and light-sensitive organs in the segments.
C. being hermaphroditic.
D. containing fewer setae than in polychaetes.
E. containing segments with a mouth on the first and the anus on the last.
Answer: A
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In plants, sporophytes undergo meiosis to produce spores.
A. diploid B. fertilized C. triploid D. haploid E. tetraploid
After obtaining DNA fragments by PCR, the
fragments are
a. separated by a centrifuge. b. viewed under a microscope. c. separated by an electric current. d. inserted into a plasmid. e. chopped up using restriction enzymes
You have discovered a new cytoskeletal element and need to identify and characterize it for further work. How would you go about examining this protein to ultimately classify it as a cytoskeletal element?
What will be an ideal response?
A shark is a(n)
A) invertebrate chordate. B) amphibian. C) cartilaginous fish. D) jawless fish. E) bony fish.