Answer: b. A compound is a pure substance because its molecule cannot be broken down into simpler particles by physical means.
I don't see a graph but I would assume since there are more trees and plants there would be less carbon dioxide meaning the graph would start to go down over time since they turn the carbon dioxide into oxygen.
<span>Because hadrosaurs could not have survived without plants, their presence in Antarctica proves that plants existed there. Additionally, fossil plants have been found in Antarctica.</span>
Answer: to work together to do a specific job
Explanation:
The organ system can be defined as the collection of organs which perform a specific function in the body of the organism. The organs are interdependent on each other for performing a specific task in the body. Some of the vital functions in the body of the animal are digestion, excretion, and reproduction are dependent on the system of organs. The digestion of food involves the organs like mouth, esophagus, stomach, large and small intestine where physical and chemical digestion of food take place. The accessory organs like liver and pancreas secrete juices that are involved in digestion of food.
