high school general science

Question: How does gaseous exchange take place in the lower plants? Answer: In lower plants exchange of gases takes place through the general body surface as they are not highly modified or specialise..

High fever, headache, body ache, nausea and violent shivering (rigours) are some of the symptoms of malaria. Each malarial attack lasts for 6-10 hours and consists of the cold stage (shivering), hot stage (fever) and sweating stage (temperature goes down to normal). The fever is repeated..

> Noble gases, some metals, carbon, silicon etc. have only one atom in their molecules. These are called monatomic molecules. Some elements have two atoms in their molecules. These are called diatomic molecules e.g., hydrogen (H 2 ), oxygen (O 2 ), nitrogen (N 2 ), chlorine (Cl 2 ), etc. Those elem..

They generally form acidic or neutral oxides with oxyge..

The effect of temperature has already been discussed earlier under limitations of ohm's law. In general for metallic conductors higher the temperature larger is the resistanc..

The study of food chains helps in understanding some of the important aspects of the ecosystem in particular and environment in general..

A lens is a portion of a transparent refracting medium bounded by two surfaces which are generally spherical or cylindrical or one curved and one plane surfac..

Buffaloes are reared in large numbers in India. There are more than ten different breeds of buffaloes in India. Of them, the high milk yielding breeds a..

Man is a highly evolved vertebrate and so the excretory organs are well develope..

It is a highly coiled and narrow region measuring about 3.6m in lengt..