Two pink-flowering plants are crossed. the offspring percentages are 25% red, 25% white and 50% pink. what would the parent's genotypes be? a. both homozygous dominant b. both homozygous recessive c. both heterozygous d. one homozygous dominant, one homozygous recessive

b. the carbon cycle ensures living things have a source of hydrogen

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.