For a physical map of a chromosome, distances are measured in units of:
A. centiMorgans.
B. contigs.
C. map units.
D. RFLPs.
E. base pairs.
Ans: E. base pairs.
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__________ are electrically excitable cells that signal other cells by means of chemical messages. Fill in the blank(s) with the appropriate word(s)
How do we know that hominids did not have
splayed-out big toes? a. Mary Leakey found footprints fossilized from soft volcanic ash. b. Some of the great apes have lost their splayed toe features. c. Complete fossils of these early hominids have been discovered. d. Examples of these hominids exist in New Guinea. e. None of these are correct.
Similar families of organisms are next grouped together in the same:a
class. b. kingdom. c. order. d. phylum. e. genu
Identify the leaf pictured as a compound or simple leaf. Explain what observations were used to make your decision. 
What will be an ideal response?