biology crossword Puzzle Title

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Across
  1. 2. a colorless, odorless gas produced by burning carbon and organic compounds and by respiration. It is naturally present in air (about 0.03 percent) and is absorbed by plants in photosynthesis.
  2. 6. a wide range of biophysical, ecosystem and socio-economic changes that alter the functioning of Earth as a system on a planetary scale
  3. 7. a series of chemical reactions that break down glucose to produce ATP, which may be used as energy to power many reactions throughout the body.
Down
  1. 1. a process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water
  2. 3. a colorless, odorless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air.
  3. 4. MRNA a type of single-stranded RNA involved in protein synthesis.
  4. 5. a self-replicating material that is present in nearly all living organisms as the main constituent of chromosomes, it is the carrier of genetic information.