the letter B. that is the answer
The waste products of respiration are Co2 and H20.
Since Jordan needs to use the high power objective in order to view the specimen under the light microscope. He should use the ocular lens in order to view the high power objective which is placed in the objective lenses. So he needs to use the ocular lens for viewing and the objective lens to magnify and see the specimen clearly on the stage.
How the universe was created:)
Explanation:
Each step in a food chain or web is called a trophic level
