<u>Answer</u>:
Option 1.Eukaryotic cells first seen
Option 5. oxygen builds up in the atmosphere
<u>Explanation</u> :
- The name <em>Proterozoic eon</em> is derived from a Greek word which means earlier life.
- This eon represents the time just before complex life started proliferating on earth.
- One of the most important events that took place during this eon was <em>build up of oxygen in the atmosphere</em>.
The fossil evidence also shows the occurrence of <em>advanced single-celled eukaryotes.</em>
<em>So the events that define the Proterozoic eon are eukaryotic cells first seen and oxygen build up in the atmosphere. </em>
The correct answer for this is true
A mixture is made from two or more substances that are different and are not joined. A compound is a substance formed when two or more elements react with each other to form chemical bonds between their atoms
Answer:
The decomposer has recycled the organic materials in the leaf and released them back into the soil.
Explanation:
Decomposers are the heterotrophic microbes that derive their nutrition by digesting the dead organic matter present in the dead bodies of living beings such as fallen leaves. As a leaf falls from a plant on the land, decomposers present in the soil start its digestion.
The organic and inorganic nutrients present in the leaves are digested into the simpler substances which in turn are released back into the soil. Therefore, decomposers serve in nutrient cycling by releasing substances such as carbon, nitrogen, phosphorus, and sulfur from the dead bodies of living beings back into nature to allow their reuse.
Some humans are using more than their fair share of water and it is having a huge impact on the environment. People tend to let their water run while brushing their teeth or shaving, and those are just two of the major problems. There may also be leakages, which can waste gallons among gallons of water. Wasting water hurts humans, it leaves them with less accessible, usable water. Additionally, wasting too much water can hurt the local environment as it drains too much water away from the natural ecosystem.
