Two of the four major divisions in the geologic time scale are the Archean eon and proterozoic eon.
<u>Explanation:</u>
The Arcean eon is dated from 3900 million years ago to 2500 million years ago. It was in this period the oldest known rocks were deposited. At that time the atmosphere of earth was composed of gases like methane, carbon monoxide, ammonia etc.
The Proterozoic eon is dated from 2500 million years ago to 540 million years ago. It was by the end of Proterozoic era that the Eukaryotas came into existence.
There are some similarities and differences between Archean eon and Proterozoic eon. Stromatolites formed by the colonies of cyanobacteria lived in both the eras. This is one similarity between both the eras.
The weather in the Archean era was hot and wet while the climate and weather of proterozoic era was different from this. Proterozoic era experienced two ice ages.
Answer:
Atoms make up every substance around you.
You cannot see single atoms without a special microscope. But every substance around you is made of atoms.
Explanation:
Four abiotic factors in a prairie ecosystem would be soil, climate/temperature, water, and oxygen. Hope this helps!
Answer:
Sarcoptes scabiei mite, causes Sarcoptic mange dissease.
Explanation:
Dry skin, severe itching and hair loss are common signs of Sarcoptic mange disease, caused by the parasite Sarcoptes scabiei mite. Which creates burrows in the skin, and causes scabies. This parasite it is easily transferred from pig to pig from physical contact.
Answer:
Unmotivated, Skinny fat, mentally obese physically normal
Explanation:
