In a mature plant cell, ____ may occupy more than 90% of a mature plant cell's volume
a. the nucleus
b. chromoplasts
c. rough endoplasmic reticulum
d. the central vacuole
e. chloroplasts
D
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What is chemical digestion?
A. The use of physical actions to break down food B. The absorption of food in the small intestine C. The use of villi to break down food D. The breakdown of food by enzymes
The letter “B” from above represents which of the
following? a. nucleus of the flame cell b. small capillaries which allow water to freely diffuse into the planarian c. sexual reproductive organ of the planarian d. cilia which flick to draw fluid into the planarian e. none of these
The principal place in the human ear where sound waves are amplified by means of the vibrations of
tiny bones is the a. pinna. b. ear canal. c. middle ear. d. organ of Corti. e. Tympanic Membrane.
Genes each have a ____ that specifies its position on chromosomes
Fill in the blank(s) with the appropriate word(s).