Which of the following is an open circuit?
A. An open circuit is a closed loop for electrons
to follow.
B. An open circuit has an incomplete path for
electrons to follow.
C. An open circuit allows electrons to flow.
D. An open circuit is when a circuit is "on".

Which of these is true of the cytoplasm of an unfertilized egg? a. it is an unevenly distributed mixture of mrna, proteins, organelles, and other substances. b. it does not contain substances that are important in directing development. c. these substances are supplied by the sperm. d. it does not contain substances that are important in directing development. e. development is directed solely by the surrounding cells. f. it is a homogeneous mixture of mrna, proteins, organelles, and other substances. g. it does not contain substances that are important in directing development. h. these substances are produced by the dna of the fertilized zygote.