Which of the following is a benefit of using agroforestry in a tropical rain forest climate?
growing trees provides a boost in crop output in the short term.
trees protect the main crop from overexposure to the sun.
growing trees increases the amount of carbon dioxide in the atmosphere.
trees shield the main crop from the effects of insects.

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.