moss

Home » moss

What happened in the Cambrian Period?

By |2018-04-21T11:56:36+00:00June 23rd, 2017|Geology|

Mossy rocks At the beginning of the Cambrian Period, about 542 million years ago, there were sea creatures like hydras, jellyfish, sponges and seaweed living in the oceans, but only one-celled algae on land yet. Small arthropods like beetles were beginning to appear, and by 540 million years ago the first land plants [...]

What is a spore? – Plant reproduction – Biology

By |2018-04-13T23:51:51+00:00May 30th, 2017|Biology|

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 themselves that didn't depend on water so much. Some of these plants evolved to be able to produce spores. To make spores, plants [...]

Haploid and diploid cells – Plant reproduction

By |2018-04-13T17:05:53+00:00May 30th, 2017|Biology|

Human sperm cells with flagella (under a microscope) - They're haploid cells. When a cell divides by meiosis, it ends up with only half the amount of DNA it had before. That is a haploid cell. When two haploid cells join together to make one new cell with the regular amount of DNA, that's [...]

What is moss? Plant Biology and Evolution

By |2017-05-29T22:55:45+00:00May 29th, 2017|Biology|

A moss-covered rock During the Cambrian period, about 540 million years ago, some early plants evolved from earlier algae that could live on land, outside of the water. These plants were like modern moss. All of the animals were still living in the water, so on land there was only moss and mushrooms. [...]