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The amount of oxygen in the atmosphere increased because the number of photosynthetic organisms, which release oxygen, on the earth dramatically increased. This lead to the Great Oxygenation Event, or the Oxygen Crisis, 2.4 billion years ago - when this free O2 entered the Earth's atmosphere.
because of the gravity of the earth
Humans need to maintain enough space and resources to increase the earth's capacity for all species. They have to make sure that they and other people have enough to survive.
Humans need to maintain enough space and resources to increase the earth's capacity for all species. They have to make sure that they and other people have enough to survive.
by eating only plants
germs.
Humans need to maintain enough space and resources to increase the earth's capacity for all species. They have to make sure that they and other people have enough to survive.
No, he recognised that species evolve into new species.
It is estimated that there are roughly 8.7 million species of animals on Earth, although the number of individual animals within each species varies greatly. The total number of animals on Earth is difficult to determine precisely due to the vast diversity of species and ecosystems.
Humans need to maintain enough space and resources to increase the earth's capacity for all species. They have to make sure that they and other people have enough to survive.
The largest numbers of species of organisms on the earth are currently bacteria. They out number plants and animals by far.
about 300 species. it has the most number of fish species on earth.