Which of the following occurs in the first 2 weeks of gestation?
A. The zygote becomes vulnerable to teratogens.
B. The central nervous system begins to form.
C. The zygote measures about 1/2 inch in length.
D. The zygote's form changes into a blastocyst.
Answer: D
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What is one reason why scientists are moving slowly regarding the therapeutic use of stem cells?
A. Stem cells have little potential for treating human diseases. B. Stem cell therapies can be passed on to future generations without their consent. C. Stem cells can migrate from where they were implanted into other tissues of the body. D. The consequences of stem cell therapies have been clearly identified and are negative.
A CS paired with shock in a rat will NOT cause:
A) stress hormones to be released into the bloodstream. B) an increase in heart rate and blood pressure. C) a decrease in respiration. D) a behavioural freezing response.
It is more common for girls to get higher grades than boys in early childhood
Indicate whether this statement is true or false.
What is the task that Piaget and Inhelder devised to demonstrate egocentrism during the preoperational stage?
a. three mountains task b. "it is about me" task c. self-centered task d. ego-stability task