In humans germ cells are located in
A. bone marrow.
B. blood.
C. all cells.
D. all tissues.
E. testes and ovaries.
E. testes and ovaries.
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The normal habitat for Vibrio cholerae is (humans/animals/water).
Fill in the blank(s) with the appropriate word(s).
The geological timescale was first developed using the fossil record, but this provided only a system of relative dating; absolute dates weren't established until the discovery of ____
Fill in the blank with the appropriate word.
The region at which the RNA polymerase binds is the ________ region.
A. coding B. promoter C. leader D. trailer
To measure the population of lake trout in a 250-hectare lake, 400 individual trout were netted and marked with a fin clip, then returned to the lake
The next week, the lake was netted again, and out of the 200 lake trout that were caught, 50 had fin clips. Using the mark-recapture estimate, the lake trout population size could be closest to which of the following? A) 160 B) 200 C) 400 D) 1,600 E) 80,000