Groups of fossil plants and animals follow each other in a definite and determinable order, and any period of geologic time can be recognized by its respective fossils. This is a statement of the . law of superposition

principle of cross-cutting relationships

principle of fossil succession

principle of original horizontality

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

24. how are vaccines used to keep people healthy?

Suppose a particular species of tulip plant has three alleles for the gene that codes for flower color. the cr allele produces red tulips, the cp allele produces purple tulips, and the cw allele produces white tulips. cr is dominant over cp and cw, and cp is dominant over cw. for each of the following crosses, determine the expected ratio of offspring for each flower color. cr cp x cp cw cr cw x cp cw 1 red: 1 purple : 0 white, 1 red: 2 purple: 1 white, 2 red: 1 purple 1 white, 1 red: 3 purple : 0 white, 2 red: 0 purple : 2 white, 2 red: 2 purple : 0 white