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
Biology & Microbiology
The bones that surround and protect the brain are collectively called the
a. spinal cord. b. vertebral column. c. pelvic girdle. d. cranium.
Biology & Microbiology
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
Biology & Microbiology
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