Platyhelminthes include which of the following organisms?

A. flukes
B. jellyfish
C. sponges
D. insects
E. mollusks


Answer: A. flukes

Biology & Microbiology

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Negri bodies are produced within  ________ of rabies-infected humans.

A. the skin B. brain neurons C. connective tissue D. skeletal muscle

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Which of the following lack a “true” coelom?

a. flatworms b. annelids c. roundworms d. flatworms and roundworms e. flatworms and annelids

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Which of the following is the best description of a gene?

A) a protein whose amino acid sequence is encoded in a segment of DNA B) A section of the nucleus where transcription takes place. C) a segment of mRNA that is translated into a protein D) a collection of millions or billions of base pairs of DNA, encoding many proteins E) a segment of DNA that is transcribed into an mRNA, a tRNA, or an rRNA

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The cotton whitefly has become a key pest, damaging many kinds of crops. The cotton whitefly has developed resistance to a variety of pesticides. Pesticide resistance would most likely develop in insects that

A. reproduce rapidly B. feed on few types of plants C. undergo complete metamorphosis D. live in very limited regions

Biology & Microbiology