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Sclereids in a diffuse pattern are dispersed throughout the leaf tissue, and sclereids in a terminal pattern are concentrated about the tips of leaf veins. Sclereid formations in leaves include the branched sclereids of Trochodendron , the columnar sclereids of Hakea , and the hair-like trichosclereids that branch into air chambers within the ...
The Spiralia are a morphologically diverse clade of protostome animals, including within their number the molluscs, annelids, platyhelminths and other taxa. [4] The term Spiralia is applied to those phyla that exhibit canonical spiral cleavage, a pattern of early development found in most members of the Lophotrochozoa.
The concept of many plants and animals coexisting together, having an ecosystem and building upwards was the theory he aimed for (example: rain forest). The general theory later failed due to the fact that there was little or extremely basic comparable information about the logic of a being, the concept worked more in favor towards smaller ...
In the social sciences, a social group is defined as two or more people who interact with one another, share similar characteristics, and collectively have a sense of unity. [1] [2] Regardless, social groups come in a myriad of sizes and varieties. For example, a society can be viewed as a large social group.
Sociality is the degree to which individuals in an animal population tend to associate in social groups (gregariousness) and form cooperative societies. Sociality is a survival response to evolutionary pressures. [1] For example, when a mother wasp stays near her larvae in the nest, parasites are less likely to eat the larvae. [2]
An extensively studied example is the fiddler crab. When exposed to a predator, fiddler crabs move in ways that are consistent with the selfish herd theory. [ 5 ] Dispersed groups are more likely to form an aggregate when subjected to danger and crabs attempt to run toward the center of a forming group.
Boreoeutheria (/ b oʊ ˌ r iː oʊ j uː ˈ θ ɛr i ə /, "northern eutherians") is a magnorder of placental mammals that groups together superorders Euarchontoglires and Laurasiatheria.
In anthropology, an acephalous society (from the Greek ἀκέφαλος "headless") is a society which lacks political leaders or hierarchies. Such groups are also known as non-stratified societies.