Freshly isolated animal tissue that is placed in a growth medium and allowed to produce a cell monolayer is referred to as a/n ________ cell culture.
A. primary
B. initial
C. secondary
D. positive
E. continuous
Answer: A
You might also like to view...
For the process of diffusion to occur, molecules must
A. move from areas of high concentration to areas of lesser concentration until an equilibrium is reached. B. move from areas of low concentration to areas of higher concentration until an equilibrium is reached. C. remain stationary until their molecular motion allows for an equilibrium to be reached. D. move from areas of high concentration to areas of lesser concentration until facilitated transport can assist the molecular equilibrium. E. move from areas of high concentration to areas of lesser concentration until an equilibrium is reached by active transport.
List, in order, the steps usually followed in producing recombinant DNA molecules in a plasmid vector
What will be an ideal response?
Some mutagens cause genetic changes that can be "corrected" by reexposing cells to the same mutagen. Other mutagens do not behave in this way. Provide one example of each of these two types of agents and describe the mutational changes caused in
Explain why some mutagens behave in one way, whereas others do not.
A common occurrence for nursing mothers is "milk let-down," which stimulates the mother's mammary glands to eject milk. Which hormone is responsible for the milk letdown reflex?
A) Follicle-stimulating hormone (FSH) B) Prolactin C) Estrogen D) Oxytocin E) Progesterone