In the development of the cell theory, Schleiden and Schwann did not study prokaryotes. Why might this have
limited their understanding of cells?
What will be an ideal response?
ANSWER: Prokaryotes are the most common of cells. By not understanding them, they could have
missed something very important. Fortunately, the cell theory was stated broadly enough that
this was not a problem and subsequent research shows prokaryotes are not an exception to
this theory.
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The function of telomeres can be best described as:
A. attachment sites for the proteins of the kinetochore. B. sequences at the ends of the linear eukaryotic chromosome that protect the ends from proteases. C. sequences of the eukaryotic chromosome that ensure proper distribution during mitosis. D. sequences of the bacterial chromosome that ensure proper distribution during binary fission. E. the sites at which replication initiates.
The major structural components of a cell membrane are ____
a. phospholipids and cellulose b. phospholipids, protein, and sterols c. protein and sterols d. glycolipids and proteins e. phospholipids and glycolipids
The short appendages on some pathogenic bacteria that provides adhesion to host cells are called
What will be an ideal response?
The first land plants were restricted to moist, marshy environments because of
A) reproductive cell requirements. B) the need for stem support. C) the need for nutrients. D) sensitivity to sunlight. E) the lack of a cuticle.