Brachiopods, phoronids, and bryozoans all have a ring of ciliated tentacles around the mouth. These animals are thus

grouped as:
a. rotifers
b. flatworms
c. ctenophores
d. lophophorates
e. onychophorans


d

Biology & Microbiology

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What is the primary means of reproduction among the protists, cnidaria, and tunicates?  

A.  asexual reproduction B.  sexual reproduction C.  asynchronous reproduction D.  hermaphroditic reproduction

Biology & Microbiology

During parturtition, mechanical pressure

caused by the movement of the fetus through the uterus causes the release of ___ from the ___.

a. HCG---hypothalamus b. oxytocin---posterior pituitary c. oxytocin---hypothalamus d. HCG---posterior pituitary e. oxytocin---adrenal cortex

Biology & Microbiology

A single contraction of all the muscle fibers in a motor unit is known as ____

a. a muscle twitch b. tetanus c. summation d. relaxation coupling e. isometric contraction

Biology & Microbiology

The work of Walter Sutton and Theodor Boveri suggested that the hereditary units, or genes, described by Mendel are located on ________

Fill in the blank(s) with correct word

Biology & Microbiology