Answer: its B: I, II, III, and IV
Explanation: i took the K12 test
Iron, oxygen and water react with the iron creating a substance known to us as rust.
Hope this helps.
Answer:
I would say chordates. (Not absolutely sure so double check)
Explanation:
Chordates have a dorsal nerve cord, which is super close to a spinal cord. (Which vertebrates have.)
I'd say protein synthesizer.
C. Mutualistic relationship
Flowers and hummingbirds have a mutualistic relationship where both benefit. Flowers produce food in the form of nectar (sugar and water) to attract hummingbirds which, in turn, move pollen for the plant (pollination).
