Why isn’t a galaxy’s size alone useful in determining its distance from earth?

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above

Recombinant dna is the merging of dna from unrelated organisms to create new genetic varieties is assembled in the lab from mononucleotides was part of the green revolution of the 1960s is pollination of one plant by another of the same species is cross-pollination of one plant by a different species