When DNA folds and winds into the nucleus of a cell, it shrinks in length by a factor of


A) 10.

B) 100.

C) 1,000.

D) 7,000.


D) 7,000.

Biology & Microbiology

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During the process of ____, blastomeres undergo extensive cellular rearrangements to produce an embryo with three

distinct primary cell layers.

a. induction b. cleavage c. organogenesis d. metamorphosis e. gastrulation

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The bones that surround and protect the brain are collectively called the

a. spinal cord. b. vertebral column. c. pelvic girdle. d. cranium.

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Which Ecdysozoan phylum contains members that have a segmented body encased in a rigid exoskeleton made of chitin plus other materials?

a. Annelida b. Nemertea c. Nematoda d. Arthropoda

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What part of the nervous system is most affected by fatal familial insomnia?

a. Thalamus b. Cerebellum c. The spinal cord d. Cerebrum

Biology & Microbiology