Jerry prefers to burn bituminous coal in his fireplace because of the yellow flame. what causes that flame color?
a.
low carbon content
b.
high sulfur content
c.
high methane content
d.
softer structure
e.
lower heat value

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.