(Please choose from the lettered responses below.) Phylogenetic trees help us understand: 1. the genetic relationships among a species. 2. the evolutionary relationships among a species. 3. the relationships of symmetry among related species. 4. the level

A. 1 and 2
B. 2 and 3
C. 2 and 4
D. 3 and 4


C

Biology & Microbiology

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The simplest eye structure, which is able to perceive light but not form an image, is called a(n) ____

a. compound eye b. single-lens eye c. ocellus d. ommatidia e. photoreceptor

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Turbellarians detect small prey items using chemoreceptors

Indicate whether the statement is true or false

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The specialized structure in a tube worm in which endosymbiotic, chemolithotrophic bacteria live is called a(n) ________.

Fill in the blank(s) with the appropriate word(s).

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The type of polio that involves the infection of the brain stem and medulla is

A. asymptomatic polio. B. post-polio syndrome. C. bulbar poliomyelitis. D. minor polio. E. non-paralytic polio.

Biology & Microbiology