Which is NOT true about viruses?
A. They may have genetic information in the form of RNA.
B. They may reside in a host cell for years without killing it.
C. They may cause a host cell to become cancerous.
D. They consist of a nucleic acid surrounded by a carbohydrate shell.
E. They require a host cell in order to reproduce themselves.
Answer: D
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A normal oncotic pressure is ________ mm Hg.
A. 22-25 B. 25-30 C. 32-37 D. 40-45
Most cerebrospinal fluid is secreted from the choroid plexuses in the
A) cerebral aqueduct. B) third ventricle. C) fourth ventricle. D) lateral ventricles.
Gametes have the ___ chromosome number, while a zygote has the ___ chromosome number
A) 2N...2N B) 2N...N C) N...N D) N...2N
The umbilical region of the human is on the ________ surface, and the umbilical region of the dog is on the ________ surface
A) anterior, superior B) posterior, superior C) posterior, inferior D) anterior, inferior