The spindle apparatus is composed of ____________________.
A. Golgi bodies
B. microtubules
C. endoplasmic reticulum
D. nucleoprotein
E. chromatids
Answer: B
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What is the knot of capillaries in the nephron where blood is filtered?
A) Renal cortex B) Collecting duct C) Glomerulus D) Glomerular capsule
How are Gram-positive and Gram-negative flagella different?
a. Flagella are only found in Gram-negative bacteria. b. A Gram-positive flagellum has only two rings in its basal body; Gram-negatives each have four. c. A Gram-positive flagellum does not have a membrane covering its filament; A Gram-negative flagellum does. d. Each Gram-positive flagellum contains a hook; gram-negatives do not.
What can be said about sex-determination in humans?
a. All human sperm carry a Y chromosome. b. 25% of human zygotes are XY. c. All zygotes carry a Y chromosome. d. Sex depends upon which type of sperm fertilizes the egg. e. All human eggs carry a Y chromosome.
Which body system will return excess tissue fluid to the cardiovascular system?
A. lymphatic B. muscular C. urinary D. digestive E. neural