The embryo folds over to form the neural tube
A) once it has six layers of neurons.
B) approximately 4 weeks after conception.
C) approximately 10 weeks after conception.
D) right after synaptogenesis is completed.
B) approximately 4 weeks after conception.
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Janie states that she likes to write, so she will become a
journalist, while Matt wants to make a lot of money and decides that "being a lawyer pays well." Both Janie and Matt are making their career decisions by a. framing the question of a career too narrowly. b. framing the question of a career too broadly. c. using a divergent, creative approach in selecting a career. d. using a random search strategy in selecting a career.
In the context of the "three Rs" of animal research, replacement refers to ____
a. avoiding the use of irreversible procedures b. identifying less painful procedures c. using computer models if possible d. ensuring that animals are only used in one experiment