Walking and lifting objects all require this type of muscle.
A. smooth
B. skeletal
C. cardiac
Answer: B
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Which of the following is NOT a principle used when analyzing cladograms?
A. All species, or higher taxa, are placed on tips in a phylogenetic tree. B. All species, or higher taxa, are placed on nodes in a phylogenetic tree. C. Each cladogram branch point should have one or more shared derived characters that are common to all species above the branch point, unless the character is later modified. D. All shared derived characters appear together only once in a cladogram unless they arose independently during evolution more than once. E. All species, or higher taxa, are placed on tips in a phylogenetic tree and all shared derived characters appear together only once in a cladogram unless they arose independently during evolution more than once.
Incompatibilities between the developing embryo and the maternal organism that cause the embryo to
abort spontaneously may prevent individuals of different populations from producing fertile offspring. Such differences may be an example of a. isolating mechanisms. b. allele frequencies. c. mutations. d. founder effects.
e. gene flow.The major respiratory muscle is the ____
a. diaphragm b. external intercostals c. internal intercostals d. scalenes e. trapezius
The sperm produced by mosses require _____ to reach an archegonium.
a) animals b) light c) the development of a flower d) wind e) moisture