Answer:
It contains 2 or 3 ppm of oxygen concentration.
Global warming / climate change resulting in the melting of glaciers causing a rise in sea level.
Gonads are sex organs that produce gametes. Male gonads are the testes, which produce sperm and male sex hormones. Female gonads are the ovaries, which produce eggs (ova) and female sex hormones.
it allows them to hold water bc if it is solid
