Brush border cells have:
a. villi
b. acidic secretions
c. microvilli
d. bile secretions
e. smooth muscle
c
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What protozoan parasite is acquired by the oral route, but once ingested can readily cross the placenta causing an infection in the fetus that can result in a number of congenital defects?
A. Cyclospora cayetanensis B. Giardia intestinalis C. Cryptosporidium parvum D. Toxoplasma gondii
What function does a clitellum serve?
a. anchoring an animal to its substrate b. digestion c. cushions organs d. glues two organisms together for sperm exchange e. keeps blood from clotting
Canals lined with endosteum that occur at right angles to central canal. Connect blood vessels and nerves of periosteum, medullary cavity, and central canal.
What will be an ideal response?
The Lygaeus mode of sex determination is the ________
A) scheme based on single translocations in the X chromosome B) XO/YY scheme C) hermaphroditic scheme D) XY/XX scheme E) XX/XO scheme