Why doesn't a tapeworm have a mouth on its scolex?

A. The mouth is on the proglottids.
B. The mouth is located at the end of the pharynx.
C. Tapeworms use a radula instead of a mouth to feed.
D. Endoparasites don't need a mouth.


Answer: D

Biology & Microbiology

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Choose the two primary factors that contribute to the resting membrane potential of a neuron.  

_____ K+ leak channels make the cell membrane more permeable to K+. _____ The sodium-potassium pump exports 3 K+ from the cell for every 2 Na+ it imports _____ Na+ leak channels make the cell membrane more permeable to Na+. _____ K+ leak channels cause a higher concentration of K+ outside the cell. _____ The sodium-potassium pump exports 3 Na+ from the cell for every 2 K+ it imports

Biology & Microbiology

Contraction and relaxation of smooth muscle in the wall(s) of ____ can alter its diameter and air flow

a. alveoli b. bronchioles c. bronchi d. trachea e. larynx

Biology & Microbiology

Inducing mutations in a population...

a) is a method of cloning b) increases the genetic variation in the population c) results in organisms with very similar traits d) decreases the genetic variation in the population

Biology & Microbiology

All of the following bases are found in RNA molecules EXCEPT

A. adenine. B. thymine. C. uracil. D. cytosine. E. guanine.

Biology & Microbiology