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The discovery of Titanoboa cerrejonensis supplanted the previous record holder, Gigantophis garstini, which is known from the Eocene of Egypt. Titanoboa evolved following the extinction of all non-avian dinosaurs, being one of the largest reptiles to evolve after the Cretaceous–Paleogene extinction event. Its vertebrae are very robust and ...
Mallon and Anderson postulated that Ankylosaurs and Ceratopsids may have partitioned the herb layer in the Dinosaur Park Formation, or that Ceratopsid feeding height was slightly higher. [21] As well as suggesting that the Ornithopods might have made room for the passing Ceratopsid herds by rising up to avoid ecological competition.
Each glycerophospholipid molecule consists of a small polar head group and two long hydrophobic chains. In the cell membrane, the two layers of phospholipids are arranged as follows: the hydrophobic tails point to each other and form a fatty, hydrophobic center; the ionic head groups are placed at the inner and outer surfaces of the cell membrane
This jellyfish-like critter’s body, made largely from a gelatinous material called mesoglea, is packed within an ultrathin membrane—kind of like a water balloon. Scherer’s preparation:
Like mammals, dinosaurs stopped growing when they reached the typical adult size of their species, while mature reptiles continued to grow slowly if they had enough food. Dinosaurs of all sizes grew faster than similarly sized modern reptiles; but the results of comparisons with similarly sized "warm-blooded" modern animals depend on their ...
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Though they have little meat, horseshoe crabs are valued as a delicacy in some parts of East and Southeast Asia. [56] The meat is white, has a rubbery texture similar to lobster, and possesses a slightly salty aftertaste. [56] Horseshoe crab can be eaten both raw and cooked, but must be properly prepared to prevent food poisoning. [56]
Illustration of a eukaryotic cell membrane Comparison of a eukaryotic vs. a prokaryotic cell membrane. The cell membrane (also known as the plasma membrane or cytoplasmic membrane, and historically referred to as the plasmalemma) is a biological membrane that separates and protects the interior of a cell from the outside environment (the extracellular space).