Molten rock rises in earth's mantle and then sinks back toward the core in a circular pattern, this method of heat transfer is known as..
a) conduction
b) vibration
c)radiation
d) convection

What are two examples of conduction that we use everyday

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.

Can a trait be both polygenic and have multiple alleles? explain why or why not.