Search results
Results from the WOW.Com Content Network
Shed cuticle of female tardigrade, containing eggs, each 50μm across. Most tardigrades have both male and female animals which copulate by a variety of methods. The females lay eggs; those of Austeruseus faeroensis are spherical, 80 μm in diameter, with a knobbled surface.
Bears use shelters, such as caves and logs, as their dens; most species occupy their dens during the winter for a long period of hibernation, up to 100 days. Bears have been hunted since prehistoric times for their meat and fur; they have also been used for bear-baiting and other forms of entertainment, such as being made to dance.
Female bears, called sows, will hibernate to give birth and nurse their cubs. The family will them emerge from their den in the spring when the cubs are weaned and can survive on solid food.
Monotremes are typified by structural differences in their brains, jaws, digestive tract, reproductive tract, and other body parts, compared to the more common mammalian types. Although they are different from almost all mammals in that they lay eggs, like all mammals, the female monotremes nurse their young with milk.
The egg is not retained in the body for most of the period of development of the embryo within the egg, which is the main distinction between oviparity and ovoviviparity. [1] Oviparity occurs in all birds, most reptiles, some fishes, and most arthropods. Among mammals, monotremes (four species of echidna, and the platypus) are uniquely oviparous.
The grizzly bear (Ursus arctos horribilis), also known as the North American brown bear or simply grizzly, is a population or subspecies [4] of the brown bear inhabiting North America. In addition to the mainland grizzly (Ursus arctos horribilis), other morphological forms of brown bear in North America are sometimes identified as grizzly bears.
Embryonic diapause [a] (delayed implantation in mammals) is a reproductive strategy used by a number of animal species across different biological classes.In more than 130 types of mammals where this takes place, the process occurs at the blastocyst stage of embryonic development, [1] and is characterized by a dramatic reduction or complete cessation of mitotic activity, arresting most often ...
After all, Winnie the Pooh was also based on a stuffed animal initially called "Edward Bear." Throughout A.A. Milne's original stories, Winnie the Pooh is constantly referred to with male pronouns.