D. A pond has 12 species of organisms including 300 animals and 40 plants
Answer:
During a process called photosynthesis, plants take in carbon dioxide, sunlight ,and water.
Plants make sugar and give off oxygen as a by-product of this process.
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Answer:
Our bodies consist of a number of biological systems that carry out specific functions necessary for everyday living. The job of the circulatory system is to move blood, nutrients, oxygen, carbon dioxide, and hormones, around the body. It consists of the heart, blood, blood vessels,arteries and veins.
Explanation:
Answer:
Where DNA has thymine, RNA has uracil. So the structural component that is found in DNA but not in RNA is thymine.
Explanation: