What type of mechanism controls body
temperature?
a. positive feedback
b. inhibition
c. negative feedback
d. cyclical feedback
e. none of these
C
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Skin cancer usually occurs in layer A, which is the __________, and is most often caused by
_____.
a. epidermis; UVA b. epidermis; UVB c. dermis; UVA d. dermis; UVB
Chorionic villus sampling differs from amniocentesis in that for CVS
A) cells must first be cultured. B) biochemical tests can be performed on the sample. C) a karyotype is prepared directly from collected cells. D) cells do not directly descend from the fertilized ovum.
The lining of the gastrovascular cavity in cnidarians will function in both ________
a. respiration and reproduction b. urination and respiration c. respiration and digestion d. immunization and digestion e. reproduction and digestion
Agar is used as a solidifying agent in microbiological media since few bacteria can degrade it
Indicate whether the statement is true or false