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
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
Most cerebrospinal fluid is secreted from the choroid plexuses in the
A) cerebral aqueduct. B) third ventricle. C) fourth ventricle. D) lateral ventricles.