most of the carbon dioxide that a plant uses during photosynthesis is absorbed from the air give one other source of carbon dioxide for a plant. which one is it? The soil, the respiration in the plant, osmosis in the plant or water? which one is it?​

Which group of chordates does  notpossess true backbones?                 a.  birds      b.  frogs and toads      c.  lampreys      d.  crocodilians

Aboy with an extra x chromosome probably has which of the following syndromes?

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism