The microtubules that overlap in the center of the mitotic spindle are called _______ microtubules.

a. astral
b. polar
c. kinetochore
d. central
e. minus-end


Ans: b. polar

Biology & Microbiology

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Organic molecules have a carbon backbone and _____ such as -OH and -NH2 that affect their chemical properties

A. chemical groups B. R groups C. extension groups D. functional groups

Biology & Microbiology

The ________ is the collection of microorganisms (and their genes) that are normally present in and on an organism.

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

Biology & Microbiology

People with the disease known as sickle-cell anemia are often better able to survive malaria because of

a. balanced polymorphism. b. heterozygote advantage. c. frequency dependent selection. d. disruptive selection. e. stabilizing selection.

Biology & Microbiology

Ionic bonds form as a result of _________.

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

Biology & Microbiology