A phylogenetic tree is actually a ____________ that depicts the evolutionary relationships among species.

A. drawing
B. hypothesis
C. theory
D. paraphylogy
E. monophylogy


B. hypothesis

Biology & Microbiology

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Intramolecular protein splicing results in the formation of the final protein and the

A) protease. B) proteosome. C) inteins. D) all of the above E) none of the above

Biology & Microbiology

During exhalation, the diaphragm _______.  

A.  contracts and moves down B.  relaxes and moves up C.  relaxes and moves down D.  contracts and moves up

Biology & Microbiology

The carrying capacity of an environment is

increased by

a. pollution. b. predation. c. disease. d. population growth. e. none of these

Biology & Microbiology

If the embryos of a mating do not develop properly and die, thus preventing the offspring of two different species from continuing to reproduce, they are an example of 

A. behavioral isolating mechanisms. B. mechanical isolating mechanisms. C. biochemical isolating mechanisms. D. hybrid inviability.

Biology & Microbiology