1) The answer is <span>bluegreen algae
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Bluegreen algae or cyanobacteria <span>are thought to have started life on earth because they converted the atmosphere that didn't have a lot of oxygen, into an atosphere with enough oxygen to exist life. That </span>oxygen was a product of their photosynthesis.
2) The answer is lightning.
<span>By Primordial Soup Theory, life began as a result of the combination of chemicals from the atmosphere and lighning (a form of energy) to make amino acids. Aminoacids are necessary to build proteins, and proteins are necessary for all the organisms.</span>
Stable isotopes refers to those isotopes that do not undergo radioactive decay. Oxygen atoms with atomic number of 16 and 18 are examples of stable isotopes. These isotopes of oxygen are usually found in substances such as polar ice and calcite. These substances are usaually measure with isotope fractionation and the ratios obtained are used to estimate water temperature of ancient oceans. From this, scientists can find out facts about ancient climates,
Answer:
Explanation:
Produce it using sunlight carbon iv oxide
And water(moisture)
Decomposers break down the dead decaying body parts of all other organisms. They are also known as saprophytes. Apart from this, the top consumers like sharks, dolphin etc. eat away the smaller trophic organisms like squids, fishes etc,. But after the death of the tertiary consumers, they are also decomposed by the decomposers.
D, since it only affects the sex cell which are for forming offspring.