Looking at flowers – Angiosperms project – Biology
Daffodil with petals and pistil in the middle. Take a long walk around your neighborhood and the park in the late spring and look at all the flowers you see. [...]
Daffodil with petals and pistil in the middle. Take a long walk around your neighborhood and the park in the late spring and look at all the flowers you see. [...]
Flowering plants: Lavender flowers smell wonderful! Before there were flowers... For millions of years, the Earth was covered with ferns and pine trees and moss and mushrooms, without any flowers, grass, [...]
Seaweed in the ocean For the first two billion years of life on Earth, there were only one-celled creatures. But after early eukaryote cells started to reproduce by meiosis in addition to [...]
A beach in Tunisia, in North Africa To find out more about seaweed, take a trip to the coast and go wading in the water. There is seaweed on pretty [...]
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 [...]
Evolution of seeds: Dandelion seeds What is a seed? A seed is the egg cell of a plant, with a hard wrapper around it so it can survive on its [...]
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 [...]
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. [...]
Black-eyed Susan (the black in the middle is the seeds) - How flowers reproduce When did flowers evolve? The earliest flowers probably developed about 130 million years ago, in the [...]
Sphagnum moss with spores standing up Wander around your back yard or a park until you find a fern. Look at the underside of one of the leaves. There are [...]