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 ...
Plant reproductive complexity increased in two, widely separated pulses likely driven by important evolutionary innovations, including the origin of seeds and flowers, according to a new study. These ...
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 ...
In this image of one of the new ancient species' reproductive structures, elliptical impressions of sporangia can be seen in one row, while on the right, another row displays preserved carbonized ...
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