Answer:
grass
Explanation:
grass produces the main source of energy for the food chain
<span>There are other avenues to find the cure to diseases that do not involve exploiting fetuses.
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The answer will be haptens because haptens has the ability of combining to carriers that are large enough to produce antibodies. The large carriers are usually the proteins that binds to it after producing antibodies. The antibodies, ions and reagins does not comply in the question above for antibodies focus more in the immunization. The ions are the electrons that produce positive or negative electric charge and the reagins are the ones responsible in allergic reactions.
Activation energy - is the minimum quantity of energy that the reacting species must possess in order to undergo a specified reaction.
