Social Science Questions & Answers

According to WHO, decaying of teeth is a localized, post-eruptive pathologic external process, involving hard tooth tissue and formation of cavities. There is demineralization of teeth by acids produced in the oral environment, due to action of oral acidogenic bacteria on carbohydrates found in cooked food and drinks. Animals are either herbivorous or carnivorous or both, and survive on uncooked, …

The tautara is the only survivor of the beak-headed order of reptiles, called Rhynchocephalia, that goes back to the time of the dinosaurs. It hunts by night and its prey are insects. Like the coelecanth, a prehistoric fish that still survives, the tautara is almost a living fossil. It can now be found only on some of the small islets …

The camel’s best known nickname is ‘the ship of desert’, and it is very well suited to the camel. The camel is ideally suited to the life it leads in the desert, and its best adaptation is its hump. Although many people know that the camel can go for days, even weeks at a time, without food or water, not …

There are two occasions when a snake will dance – both connected with the mating season. In the first case the dancing partners are both male and their performance appears to be a from of aggression designed to impress the female. The second occasion is a nuptial dance between male and female. First the snakes pursue each other and coil …

The song of the birds at dawn has given pleasure to millions of people has been celebrated in poetry and prose for many years. The most usual explanation given in the Middle Ages was that the birds sang each day in praise of God and the beauty with which, he had clothed the world. More recently, there was the feeling …

Turtles and tortoises have been on planet Earth even before the dinosaurs. They are that old. The difference between a turtle and tortoise is that the turtle stays in water while the tortoise stays on land. But both creatures have one thing in common: they live to a ripe old age, from 120 years to almost 200 years! Some of …

Some animals have a special, reflective surface right behind their retinas, called the tapetum lucidum, which helps animals see better in the dark. When light enters the eye, it hits a photoreceptor that transmits the information to the brain. But sometimes light doesn’t hit the photoreceptor, so the tapetum lucidum acts as a mirror to bounce it back for a …

Some plants capture insects and other tiny animals and use them as food. They do not devour their prey by chewing but decompose them in a mixture of enzymes. The pitcher plant attract to its large showy leaf by means of sweet-smelling nectar. The leaf has a treacherous lip which precipitates the unwary victim into a deep hollow pitcher full …

Some animals in cold climates escape the severest weather by hibernating. That is, they spend the winter months in a very long deep sleep. The world hibernate comes from the Latin hibernare, which means to winter many animals find sheltered place underground or at the base of trees and hedges in which to hibernate. Hibernating animals include frogs, newts, toads, …

Rattles are a warning adaptation. The sound of the rattle warns potential predators or careless wanderers of the presence of these venomous creatures.