The structure that helps assure only a single sperm fertilizes an egg is the
A) zona pellucida.
B) amnion.
C) blastocyst.
D) placenta.
Correct Answer:
Verified
Q17: Which of the following is a type
Q18: The structure that helps neurons transmit action
Q19: During an action potential, a neuron's membrane
Q20: The sensory cells for hearing are found
Q21: If you lost the smallest bone in
Q23: ATP is required during muscle contraction because
Q24: A motor neuron connects to muscle cells
Q25: Describe how actin and myosin work together
Q26: Fertilization occurs in the
A)ovaries.
B)oviduct.
C)uterus.
D)either B or C
Q27: The fluid-filled structure that helps to cushion
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