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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 [...]