The movement of water from the soil through the different plant cells in the African violet is a

type of __________ transport called __________.



a. active; diffusion
b. passive; diffusion
c. active; osmosis
d. passive; osmosis


D

Biology & Microbiology

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Which species of bacteria can produce the highly useful Ti plasmid, used by biologists interested in genetically engineering resistant crops?

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The earliest life-forms were photosynthetic eukaryotes

Indicate whether the statement is true or false

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The tox gene that codes for the exotoxin is introduced into strains of Corynebacterium diphtheriae by a lysogenic bacteriophage

a. true b. false

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You are testing a new chemotherapy drug that blocks a kinase in the cytoplasm that helps carry signals to the nucleus causing the cell to divide.  If you expose cells to the drug at the same time you administer a hormone that should cause the cell to divide, which of the following steps would be blocked?

A. signal transduction B. activation of transcription factors C. receptor activation D. cell division

Biology & Microbiology