1. How can humans practice sustainability when using resources?
O A. Use agricultural methods that produce an excess of food and cause soil degradation.
O B. Use make non-renewable resources than renewable resources.
O C. Use practices that exceed the availability of the resource in a short period of time.
O. D. Use practices that don't jeopardize the ability of future generations to meet their needs.

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.