Answer: A
Explanation:
Our universe was born from the Big Bang about 13.5 billion years ago. ... Our solar system began forming about 4.6 billion years ago within a concentration of interstellar dust and hydrogen gas called a molecular cloud. The cloud contracted under its own gravity and our proto-Sun formed in the hot dense center.
They use a internal pouch which is named swim bladder.
Explanation; Oxygen will enter a fish’s mouth, and passes through their gills. The oxygen will be taken and gets carried by hemoglobin through their bloodstream. Hemoglobin will take out some of the oxygen into their swim bladder. The amount of oxygen will show if they will sink or rise. Your question is how do they rise. If he goes up too much, the meaning of this is when the gas diffuses into their blood and out the gills.
Got this from a writing, but rephrased it.
Answer
solar system, a globe of earth
The homo sapiens appeared after two million years ago.Some of them spread from Africa into Asia and Europe.
Answer:How do you suppose knowledge was gathered and shared by humans before the scientific method was used?
Before the scientific method was used knowledge was gathered and shared by logic and group discussions. The view of the natural world was probably just based off of superstitions' and opinions. Now we link facts into coherent and comprehensive understandings about the natural world.
Explanation:
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