Which of the following is true of infants' ability to differentiate sounds?
A) Infants are born with the ability to ignore small, meaningless variations in the sounds of their native language.
B) Infants can discriminate the sounds of their parent's voices by 3 months of age.
C) By the age of one week, infants perceive differences between speech sounds that are highly similar.
D) By the age of one month, infants reliably discriminate three-syllable words.
Question 2
During early adulthood, _____.
A) cardiovascular capacity can be increased with regular exercise
B) the heart muscles become more flexible, increasing the maximum heart rate
C) the cardiovascular system does not undergo any change
D) the cardiovascular system is at the highest risk of developing congenital heart diseases
Cottontails' ears have developed to hear even whisper-quiet sounds at incredible distances.
Eastern gray squirrels are born naked with their eyes closed
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