A bundle of long axons outside of the central nervous system is called a(n) __________
Fill in the blank(s) with the appropriate word(s)
Answer: Nerve
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A ________ is a DNA molecule used in hybridization reactions to detect the presence of a particular gene in separated DNA fragments.
A. blot B. vector C. probe D. plasmid
Microdomains in eukaryotic plasma membranes can participate in
A. cell division. B. cell movement. C. signal transduction. D. All of the choices are correct.
situation in which a genetically distinct local population is established by a few colonizing individuals is know as
A. fitness. B. gene pooling. C. genetic drift. D. the founder effect.
Molecular-based phylogies place the phylum Platyhelminthes in the Protostomia. How do scientists best explain the morphological differences between flatworms and the other members of the Lophotrochozoa?
A. Modern Platyhelminthes do not have a coelom but did originate from an ancestor that had one. B. The Platyhelminthes clade separated from other clades before coeloms evolved and consequently Platyhelminthes have never had a coelom. C. Platyhelminthes evolved from an ancestor without a coelom but developed one during the course of their evolution. D. Some Platyhelminthes have a coelom but others do not and it is difficult to conclude anything about its evolution within the clade. E. Platyhelminthes originated from ancestors with a coelom and have retained it to the present time.