Thank you
Which of the following factors that the other planets in the solar system do not have contribute to the support of life on Earth? *

a. seasons
b. the year-long revolution around the sun
c. the presence of liquid water
d. the presence of a moon

Choose the best definition of allele. a. one of several possible versions of a gene, which each produce a different phenotype b. an organism that's purebred for a given trait c. the process of fertilizing a plant with pollen from another plant d. a set of genes that are located on the same chromosome and so are tightly linked