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Introduction to genetics
Genetics is the study of how living things receive common traits from previous generations. These traits are described by the genetic information carried by a molecule called DNA. The instructions ... > more -
Stegosaurus
Stegosaurus, meaning "plated lizard", because of the plates on its back was a genus of large herbivorous dinosaurs from the Upper Jurassic of North America. It is among the most easily identifiable ... > more -
Feathered dinosaurs
The realization that dinosaurs are closely related to birds raised the obvious possibility that some dinosaurs had feathers. Fossils of Archaeopteryx include well-preserved feathers, but it was not ... > more -
Introduced species
An introduced species (also known as an exotic species) is an organism that is not native to the place or area where it is considered introduced and instead has been accidentally or deliberately ... > more -
Egg (biology)
In most birds and reptiles, an egg is the zygote, resulting from fertilization of the ovum. It nourishes and protects the embryo. Oviparous animals are animals that lay eggs, with little or no other ... > more -
Speciation
Speciation refers to the evolutionary process by which new biological species arise. There are three main ideas concerning the emergence of new species (Modes of Speciation), each based on the degree ... > more -
Food chain
Food chains and food webs and/or food networks describe the feeding relationships between species in a biotic community. In other words, they show the transfer of material and energy from one species ... > more -
Crotalinae
Pit vipers, like the pitless vipers, are highly venomous; the western diamondback rattlesnake is responsible for the majority of snakebite deaths in North ... > more
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