The ozone layer helps prevent harmful UV rays from entering the atmosphere.
Answer:
Actually, glucose is consumed, and carbon dioxide is produced. The carbon in glucose is oxidized to carbon dioxide during cellular respiration.
Explanation:
Answer - Cyanobacteria aka Algae that contributed in creating O2 for the atmosphere as a byproduct thru Photosynthetic.
Reason - Of course Algae make up mainly the whole world in waters and they do photosynthesis to give off oxygen in the atmosphere.
Answer:
For the object of to be considered alive , it must have DNA and all the characteristics of living things.
Explanation:
If one is to determine whether the object is alive or not the object should possess all the properties of living things. firstly, it should have the genetic material the DNA without which the cell can't be alive or the nucleus in case of PROKARYOTES. it should have the ability to reproduce, move , to grow and to excrete without which it would not be considered alive.
