A foramen magnum located at the rear (posterior) of the skull indicates that the animal ________

a. could vary its body position from upright to quadruped
b. walked upright
c. was a hominid
d. walked on all four feet


d

Biology & Microbiology

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How many letters are in the RNA "alphabet" of the genetic code?

a. 4 b. 5 c. 20 d. 64

Biology & Microbiology

Small structure in a cell that performs a specific function is the ___________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

You are the scientific consultant for a television show about forensic analysis. In an upcoming episode, investigators will compare the DNA of a suspect and a DNA sample collected from the victim's fingernails. You are to write up a brief explanation of the technique required for comparing the DNA. Which technique should you explain?

A. fluorescent in situ hybridization B. RT-PCR C. RNAi D. DNA fingerprinting

Biology & Microbiology

Which of the following cells is NOT an APC?

A) dentritic cells B) macrophages C) mature B cells D) natural killer cells E) None of the answers is correct; all of these are APCs.

Biology & Microbiology