Chemical modifications of DNA that can turn genes on and off are termed epigenetic:

A) factors.
B) proteins.
C) variations.
D) marks.


D) marks.

Psychology

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What is the most common chromosomal abnormality resulting in birth defects?

a. Down syndrome b. Cystic fibrosis c. Spina bifida d. Autism

Psychology

In a study of the effectiveness of cognitive therapy on anxiety, fifty anxious patients are divided into two groups. One group gets cognitive therapy, the other a fake kind of therapy that should have no benefit. However, the patients can tell that the second form of treatment is a fake. The study is weak because ____

a. its placebo condition did not control for expectancy effects b. it did not include an independent variable c. it confuses experimental designs with correlational designs d. it did not have a placebo condition

Psychology

James argued that Wundt's approach to psychology was limited because Wundt:

A) did not study consciousness as it functioned in the real world. B) did not conduct much laboratory research. C) unnecessarily constrained his research to observable behaviour. D) advocated a theory inconsistent with the tenets of natural selection.

Psychology

In Freud's approach, the major developmental task of the ________ stage is ________

a. oral; the Oedipus complex b. anal; weaning c. genital; toilet training d. latency; the development of defense mechanisms

Psychology