What is a factor that drives animal migration?
A. availability of mates
B. intraspecific competition
C. seasonal availability of food
D. hunting pressure
E. tidal patterns
Answer: C
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An oxygen atom has ____ surrounding a nucleus composed of ____
a. neutrons; electrons and protons b. electrons; protons and neutrons c. protons and electrons; neutrons d. protons; neutrons and electrons e. electrons and neutrons; protons
DNA polymerases ____
a. unwind DNA b. add new nucleotides to a strand c. catalyze carbon bonding d. assemble new strands in both direction e. repairs DNA
Cuboidal epithelial cells are thin, flat cells
____________________ Indicate whether the statement is true or false.
A sample of milk is tested for its bacterial content in a plate count assay. A one-milliliter sample of the milk is diluted in a 1:10 dilution series. One milliliter of the third dilution tube is plated in a pour plate. After incubation, the plate has 54 colonies, indicating that the original milk sample contained
A) 54 cells per milliliter. B) 540 cells per milliliter. C) 5,400 cells per milliliter. D) 54,000 cells per milliliter. E) 540,000 cells per milliliter.