What type of media is used to demonstrate oxygen requirements of microbes?
A. thioglycollate
B. blood agar
C. sodium chloride
D. sulfite polymyxin sulfadiazine
Answer: A
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When yeast cells of the "a" mating type are exposed to a solution of "? pheromones
A) those yeast cells will undergo cell division B) actin filaments will form a cleavage furrow in the yeast cells C) the yeast cells will fuse with each other D) G proteins will be activated in the cell signaling pathway and the yeast cells will change shape E) those yeast cells will undergo DNA replication
On a phylogenetic tree, each node (branchpoint) represents a divergence event, and the length of the branches represents the number of molecular changes that have taken place between the nodes.
Answer the following statement true (T) or false (F)
Bone cells called __________ continually remodel bone
a. chondrocytes b. adipocytes c. osteons d. osteocytes e. lamellae
When cloning a sheep, the step that IMMEDIATELY follows the isolation of an egg cell from one sheep and a mammary cell from another sheep and removing the nucleus from the egg cell is:
a) removing the nucleus from the mammary cell. b) transplanting the embryo into the womb of a surrogate mother sheep. c) fusing the mammary cell, including its nucleus, with the egg cell. d) initiating cell division. e) growing the embryo in culture.