Which term actually applies to a blend of several different complementary hormones that promote the maturation and functional competence of the immune system?

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.

What class of levers is shown in this image?

Which environmental change would most likely result in bullfrog offspring that are able to store more water than bullfrogs in previous generations?