Biology

#161 What is a nut?

I learned this today. A nut is a hard-shelled pod that contains the fruit and a seed. The difference between a nut and a seed is the hard outer shell. A seed is an embryonic plant. It contains protein, vitamin B, minerals, fat, and dietary fiber. These are all of the things that the seed

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#139 What are the six great mass extinction events?

I learned this today. There have been six mass extinctions on Earth that experts know about. The Great Oxidation Event about 2.4 billion years ago. The Ordovician-Silurian Extinction 440 million years ago. The Devonian Extinction 365 million years ago. The Permian-Triassic Extinction 250 million years ago. The Triassic-Jurassic Extinction 210 million years ago. The Cretaceous-Tertiary

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#133 Is coral a plant or an animal?

I learned this today. Corals are animals because they don’t produce their own food. Corals are sometimes thought to be rocks and sometimes thought to be plants, but they are neither. They are animals. They are thousands of tiny animals collected together. Because of this, they are known as colonial organisms. They belong to the

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#127 How does cancer kill people?

I learned this today. Cancer kills people because it grows into key organs, nerves or blood vessels and impairs their function.  Cancer is caused when cells start to change abnormally. New cells in our bodies form through growth and division. When cells become old and need to be replaced, they are switched off and die.

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