Which of the following describes the chelicerae of arthropods?

a. specialized mouthparts
b. a fused head and thorax
c. respiratory openings
d. body segments


a. specialized mouthparts

Biology & Microbiology

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Gyres are divided into the following types of currents (named below) except

a. Ekman spiral. b. eastern boundary. c. western boundary. d. transverse.

Biology & Microbiology

It becomes possible to predict evolutionary changes in a population after we have measured two attributes affecting the population in question. What two measures allow us to make such predictions?

What will be an ideal response?

Biology & Microbiology

Prions are created when normal proteins in the body ____

a. combine with large ribosomal subunit and become infectious

b. exchange several long sections of amino acids with other infected proteins c. refold into a different and infectious three-dimensional shape that kills cells in the brain and nervous system d. undergo mutation and create hundreds of copies of themselves e. invade the immune system, causing it to mistakenly destroy the body’s healthy tissue

Biology & Microbiology

The Greek root words meaning "together" and "fatherland" are the basis for the term

A. adaptive radiation. B. allopatric. C. sympatric. D. speciation. E. prezygotic.

Biology & Microbiology