What are ancestral character traits?
a. character traits that must be used when constructing phylogenies.
b. features that have evolved since the time of the last common ancestor of the species under consideration.
c. traits present in the last common ancestor of a certain group of species under consideration.
d. traits that are more specialized than derived characters.

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.