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The sickle cell allele is common among
A)Jews of European descent.
B)children whose parents are of Mediterranean descent.
C)male Caucasians born in North America.
D)black Africans.
A sure sign that labor is only hours or days away is
A)contractions in the upper part of the uterus.
B)the bloody show.
C)lightening.
D)frequent urination.
Two main types of designs used in all research on human behavior are __________ and
__________.
A)observational; experimental
B)correlational; experimental
C)observational; correlational
D)variable; observational
Rough-and-tumble play
A)is more common among girls than among boys.
B)is completely unique to humans.
C)peaks in the preschool years, then declines during adolescence.
D)seems to originate in parents' physical play with babies.
Hair color is an example of a
A)karotype.
B)phenotype.
C)gamete.
D)genotype.
Which of the following children is most likely to have myopia?
A)Travis, who lives in a low-SES household
B)Deanna, whose parents have good eyesight
C)Allie, who weighed 8 pounds at birth
D)Xiou Chen, who spends much time reading
Tate's father wants to support his identity development. He should
A)encourage Tate to wait until college to consider his future possibilities.
B)discourage Tate from talking to others about identity concerns, as this will be confusing
in his own identity search.
C)prevent Tate from joining vocational training programs, because this may cause him to
feel "locked in" to a certain career choice.
D)provide a secure base for Tate and allow him to voice his own opinions.
In biology class, Zia had to determine which of two fertilizers was best for growing
African violets. She tested not just for type of fertilizer but also for its concentration
and frequency of use. Zia used
A)hypothetico-deductive reasoning.
B)propositional thought.
C)hierarchical classification.
D)transitive inference.
Self-conscious emotions
A)are present at birth.
B)are universal and basic.
C)include happiness, fear, anger, and sadness.
D)involve injury to or enhancement of our sense of self.
One of the most frequently occurring recessive disorders is
A)phenylketonuria (PKU).
B)Huntington disease.
C)Marfan syndrome.
D)Down syndrome.
