Which of the following describes a properly controlled experiment?
A. Fifteen turtles are fed iceberg lettuce and vitamins, while another
fifteen turtles are fed only iceberg lettuce.
B. Twenty mice are fed doughnuts every day and their weight is
measured after two months.
C. A poll is taken to determine the most popular website ever.
D. Five radish seeds are planted in an outdoor garden that gets lots
of sun and water.

An example of a trait that would be considered acquired and inherited is a. a cleft chin b. muscle tone c. scar tissue d. freckled skin

Which set of terms best describes a community of miners who live out in the countryside of west virginia and use specialized geological equipment to analyze the composition of rock?

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.