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Sunlight is attenuated rapidly in the ocean, resulting in little visually useful light reaching deeper than ∼1000 m in even the clearest water (1) . To maximize sensitivity to the relatively brighter downwelling sunlight, to view the silhouette of animals above them, and to increase the...
How do plants position their leaves and flowers around the stem in such regular patterns? Auxin is well established as an essential regulator. Now, the modification of a structural cell wall component is shown to have a dramatic impact.
An image-forming optical system that is based on a mirror with an unconventional structure has recently been discovered in a deep-sea fish.
Background Microtubules (MTs) participate in the spatial regulation of actin-based processes such as cytokinesis and cell polarization (1) . The fission yeast Schizosaccharomyces pombe is a rod-shaped cell that exhibits polarized cell growth at cell tips. MT plus ends contact and shrink from the...
Src is a nonreceptor tyrosine kinase that coordinates responses to diverse soluble and adhesive signaling molecules and regulates cell proliferation, survival, differentiation and migration (1) . Normally, Src activity is tightly regulated, and Src-catalyzed phosphorylation is counterbalanced by...
The Darwin anniversaries are set to create record tourist visits to the Galapagos Islands this year and the discovery of a new ‘rosada’ species of land iguana there can only add to the attraction. But managing the numbers is a growing problem. Nigel Williams reports.
A recent brain stimulation study provides the first direct physiological evidence that attention deficits after right-hemisphere stroke arise in part from hyper-excitation of neural pathways in the undamaged left hemisphere.
Chloroplasts evolved from a cyanobacterial endosymbiont (1, 2) , and chloroplast division requires the formation of an FtsZ division ring, which is descended from the cytokinetic machinery of cyanobacteria (3–5) . As in bacteria, the positioning of the chloroplast FtsZ ring is regulated by the...
Ants are so low to the ground that slight undulations in the terrain over which they navigate will cause large and unpredictable changes to their view of the scene around them. We describe here evidence of a form of motor learning that helps ants follow their usual route when guiding landmarks...
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