Answer:
gases of nitrogen and many more
Oxygen entered the Earth's atmosphere after the appearance of the Great Oxidation Event (Great Oxygenation Event). The Great Oxidation is the first mass extinction on Earth.
The Great Oxidation lasted 2.4 to 2.0 billion years ago.
Oxygen appeared on Earth thanks to cyanobacteria using photosynthesis.
The answer is a) Baking soda!
Answer: <u>Option C, stay on the top of the snow
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Explanation: Animals have physical features which help them survive in their habitats, protect them from predators and even face adverse weather conditions. Some adaptations are according to the easy movement of the animals. For example- snowshoe rabbits have bigger feet so that they can jump on the top of the snow without digging into it.
