Answer:
common ancestor
Explanation:
If it is a cladogram or phylogenic tree which is what it sounds like your describing, the connection is that all organisms share a common ancestor :)
Oxygen and carbon dioxide is exchanged by the millions of alveoli in the lungs and the capillaries that envelop them. we inhale oxygen (which is then exchanged with carbon dioxide in the lungs) and then we exhale the carbon dioxide. although, the air that we breathe usually consists more nitrogen than oxygen.
The recommended dietary allows differs with age, sex, and health status. Leen is an healthy female adult so the RDA should be 15 mg so if she has consumed 6 mg the percentage is 6/15*100 = 40%
Fruits that the plant produces, also once it flowers it drops seeds from the flower into the soil around it and repolinates the area it is in so another plant of the same species may grow again next spring
Stairs are an example of an incline plane.
