The mitotic spindle is primarily composed of ____
a. actin
b. intermediate filaments
c. microtubules
d. keratin
e. motor proteins
ANSWER: c
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Which of the following terms includes all of the others?
A) species diversity B) biodiversity C) genetic diversity D) ecosystem diversity E) species richness
Which of the following is a restriction placed on DNA polymerase?
A. DNA polymerase can attach new nucleotides only in the 5' to 3' direction. B. DNA polymerases must begin synthesis using an RNA primer. C. DNA polymerases must have a template strand to copy from. D. All of these are restrictions of DNA polymerase
Individuals with a mutation in the SRY gene develop into
a. males with YY combination of sex chromosomes b. females with YY combination of sex chromosomes c. females with XY combination of sex chromosomes d. hermaphrodites e. they do not complete development
The ____ gives structure to many unwalled, single-celled protists
a. contractile vacuole
b. pellicle c. Golgi body d. endoplasmic reticulum e. nucleus