The following are all concepts of natural selection EXCEPT: * 1. Variations can be inherited.
2. A limited number of individuals born will survive to adulthood.
3. There is a struggle for existence among offspring of the same species.
4. All organisms of a species will survive.

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.