The bacterium E. coli swims in a straight line, called a ________, for a few seconds; then it stops, tumbles, then swims away in a new direction.
Fill in the blank(s) with the appropriate word(s).
run
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Forms of the Ras protein found in tumors usually cause which of the following?
A) DNA replication to stop B) DNA replication to be hyperactive C) cell-to-cell adhesion to be nonfunctional D) cell division to cease E) excessive cell division
Whittaker proposed adding the kingdoms _________ and __________ to his phylogenetic tree.
Fill in the blank(s) with the appropriate word(s).
Diploid cells of animals and plants are genetically similar to fungal
A. dikaryotic hyphae (1n + 1n). B. homokaryotic hyphae. C. triploid cells. D. spores. E. monokaryotic hyphae.
Enzymes increase the rate of a reaction by increasing molecular motion, thereby providing kinetic energy to drive the reaction.
Answer the following statement true (T) or false (F)