Ash trees are key to the health of certain forest ecosystem because they:
a.) consume the most resources
b.) are the largest organisms
c.) live closest to the ground
d.) support many other species

The galapagos island contain 13 species of finches four of the species are seen here it is believed that all of the species had one common ancestor and overtime

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

The structure of a dna molecule is best described as a. one long strand of nucleic acids b. two strands of dna nucleotides joined by hydrogen bonds c. two strands of amino acids joined by hydrogen bonds d. one long strand of amino acids