Cross section of a CAM (Crassulacean acid metabolism) plant, specifically of an agave leaf. Vascular bundles shown. Drawing based on microscopic images courtesy of Cambridge University Plant Sciences Department.
competition with humans for access to prey may have driven large carnivores to extinction, potentially triggering a cascade of other ecological changes.
Two new studies of green algae — the scourge of swimming pool owners and freshwater ponds — have revealed new insights into how these organisms siphon carbon dioxide from the air for use in photosynthesis, a key factor in their ability to grow so quickly.
Tomatillo Fossils, 52 Million Years Old, Are Discovered in Patagonia