The discovery of cells and the development of the cell theory would not have been possible without microscopes. Which two factors are important to all types of microscopes?
A) magnification and resolution
B) magnification and color enhancement
C) magnification and ability to observe live organisms
D) magnification and three-dimensional imagery
Ans: A) magnification and resolution
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________ are cytoplasmic channels through openings in plant cell walls.
Fill in the blank(s) with the appropriate word(s).
A person suffers a stroke. A blood clot reduced blood flow in the brain. The person is unable to say
words, but is able to read and understand text. Which of the following best explains this person's problem?
a. The cortex of the cerebellum was affected by the reduced blood flow. b. The interruption in blood flow affected the corpus callosum. c. The region of damage was responsible for integration of visual and auditory stimuli. d. The reduced blood flow damaged Wernicke's area of the temporal lobe. e. The reduced blood flow damaged Broca's area of the temporal lobe.
The letter "A" in the above figure represents
a. humerus b. pectoral girdle c. skull d. sternum e. pelvic girdle
The conjugation bridge in an Hfr × F? mating usually breaks before chromosome transfer is complete; however, because at least part of the plasmid is transferred first, the recipient becomes F+.
Answer the following statement true (T) or false (F)