Answer:70% of todays air pollution comes from gas powered vehicles so the answer is d
Explanation:
The amount of water, the location of the plant, the pot of the plant, the soil of the plant, the amount of sun the plant gets, how frequently it gets watered. (some of these may be independent depending on what you are testing for.)
Phylum chordata differs from other animal phyla because it contains a notochord , dorsal, hollow nerve cord, and a pharyngeal.
Answer:
C. double helix
Explanation:
Watson and Crick discovered that DNA molecules are double-helical structures. According to them, each DNA molecule has two DNA strands that are wound around an imaginary axis to form a double helix. These two DNA strands are held together by complementary base pairing between their bases. They discovered that a purine base pairs with a pyrimidine base to maintain a constant distance between the two strands of a double helix.
Answer:
hydrogen has smaller pole and oxygen have bigger