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Chapter 4: Q.2 (page 124)
If the nucleolus were not able to carry out its
function, what other cellular organelles would be
affected?
The nucleolus is a darkly pigmented region within the nucleus that controls ribosome synthesis.
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The ________ is the basic unit of life.
a. organism
b. cell
c. tissue
d. organ
Explain why not all microbes are harmful.
When viewing a specimen through a light microscope,
scientists use ________ to distinguish the individual
components of cells.
a. a beam of electrons
b. radioactive isotopes
c. special stains
d. high temperatures
Diseased animal cells may produce molecules that
activate death cascades to kill the cells in a controlled manner. Why would neighboring healthy cells also die?
a. The death molecule is passed through
desmosomes.
b. The death molecule is passed through
plasmodesmata
c. The death molecule disrupts the extracellular matrix.
d. The death molecule passes through gap junctions.
Explain how the extracellular matrix functions?
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