This video segment adapted from NOVA explains how flowers play a central role in the reproductive cycle of plants. Their striking array of colors, patterns, fragrances, and nectar all require lots of ...
A gradient (red) in the concentration of auxin, a plant hormone, determines that only one of the eight undifferentiated nuclei in a plant's embryo sac will become an egg. (In this image, a large ...
A gradient (red) in the concentration of the plant hormone auxin determines that only one of the eight nuclei in a plant's embryo sac will become an egg. (The blue island in the image is a cell ...
In the flowering plant world, reproduction means an intricate succession of events. It begins when a pollen grain that carries the sperm cells lands on the top of the pistil, the female reproductive ...
Once upon a time on Earth, there was a first flower. Nature provides plenty of cues to help us imagine what the planet looked like 250 million years ago. But we lack concrete evidence in order to ...
Carol A. Loopstra, Aidyn Mouradov, Adam Vivian-Smith, Tina V. Glassick, Beth V. Gale, Simon G. Southerton, Heidi Marshall, Robert D. Teasdale Plant Physiology, Vol ...
The Mostly Male theory is the first to use evidence from gene phylogenies, genetics, modern plant morphology and fossils to explain the evolutionary origin of flowers. It proposes that flower ...
The sex organs of primitive plants are inspiring precise pipettes. Liverworts are a group of ground-hugging plants with male and female reproductive structures shaped like tiny palm trees. The female ...
The Zosteraceae, a family of marine sea grasses that are aquatic monocotyledons, is presently composed of three genera: one dioecious genus, Phyllospadix, and two monoecious genera, Zostera and ...
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