Between 1980 and 2006,the rate of multiple births in the United States more than doubled,primarily as a result of
A) increased use of fertility drugs.
B) increased exposure to new sources of radiation.
C) better physical condition of potential mothers.
D) better nutrition available for potential mothers.
Correct Answer:
Verified
Q46: Which of the following options correctly lists
Q47: Which of the following agents can cause
Q48: At the end of gastrulation,the ectoderm makes
Q49: Contractions in uterine smooth muscle during labor
Q50: Which of the following statements regarding sexual
Q52: Which of the following results from cleavage?
A)formation
Q53: The brain and spinal cord are formed
Q54: Sterilization,in which the sperm is surgically prevented
Q55: Which of the following describes apoptosis?
A)phagocytosis
B)gastrulation
C)neural tube
Q56: The yolk sac of humans
A)absorbs nutrients from,and
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