People who suffer from phobias and disabling anxieties often feel afraid without knowing why due to the functions of the

Biologically influenced changes in adulthood occur _______

a. at the same age in all adults b. at varied ages but in a similar sequence c. at varied ages and in varied sequences d. at the same age and in the same sequence

Sperm counts of 10 million to 40 million sperm per milliliter of semen are considered normal

Indicate whether the statement is true or false