Structures known as microvilli are associated with:
A. communication between cells.
B. increased surface area for gas exchange.
C. adhesion to the extracellular matrix.
D. increased surface area for nutrient
absorption.
D
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How are T7 genes transcribed?
A) Host RNA polymerase is modified to recognize the T7 promoter. B) Host RNA polymerase directly translates the T7 genes. C) T7 has its own RNA polymerase, which is packaged in its capsid and injected into the host during infection to transcribe T7 genes. D) T7 has its own RNA polymerase, which must first be synthesized by the host.
What are the three checkpoints of the cell cycle and what is being “checked” during each one?
What will be an ideal response?
Which of the following would be an example of an r-selected species?
a. cheetahs b. elephants c. jellyfish d. primates
Which of the following statements is false? Typically, one surface of an epithelial tissue layer:a
is attached to a basement membrane. b. is freely exposed. c. lines cavities. d. consists of loosely packed cells with several intermediate spaces. e. covers body surfaces