What happened in the Cambrian Period?
Mossy rocks The Cambrian gets started At the beginning of the Cambrian Period, about 542 million years ago, there were sea creatures like hydras, jellyfish, sponges and seaweed living in [...]
Mossy rocks The Cambrian gets started At the beginning of the Cambrian Period, about 542 million years ago, there were sea creatures like hydras, jellyfish, sponges and seaweed living in [...]
Fern spores on the underside of a frond When plants like moss first began to grow outside the water, about 540 million years ago, they needed a way to reproduce [...]
Cell division The very earliest photosynthesizing plants on Earth, about 3 billion years ago, had only one cell, and they reproduced the way most one-celled creatures do, by mitosis: splitting [...]
A cell dividing into two cells The first reproduction One of the main ways we define whether something is alive is whether it can reproduce - if it can make a new [...]
A eukaryote cell (seen through a microscope) full of chloroplasts How do eukaryotes divide? Eukaryote cells generally reproduce themselves using a method called mitosis. When a eukaryote cell senses that there [...]
When did meiosis get started? At first all eukaryote cells divided using a process called mitosis. But about 1.4 billion years ago, some eukaryote cells developed the ability to reproduce using meiosis instead. [...]
Fish eggs - eggs science project Different types of eggs This is a simple eggs science project. Check out different kinds of eggs and you'll see the difference between fish [...]