Coal is what remains of ancient forests after millions of years of exposure to subterranean high temperatures and pressures. What group of land plants is thought to have contributed most to this fossil energy source?a) lycophytes. b) sphagnum mosses in peat bogs. c) ferns and horsetails. d) bryophytes. e) conifer and angiosperm trees.

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.