Shailesh Koirala 
A hormone(from the Greek participle “ὁρμῶ”, “to set in motion, urge on”) is any member of a class of signaling molecules produced by glands in multi cellular organisms that are transported by the circulatory system to target distant organs to regulate physiology and behaviour. A) Properties Regarded as “chemical messengers” of the body. They carry the message from the site of synthesis to the target … Read more
S.N Alternating current Direct current 1. The current which changes magnitude and polarity is called alternating current. The current which does not change magnitude and polarity is called direct current. 2. It is produced by AC generator, dynamo, etc. It is produced by cells, battery, DC generator, etc. 3. It can be used in transformer … Read more
S.N Convex lens Concave lens 1. It is thick in the middle but thin at the edges. It is thin in the middle but thick at the edges. 2. It converges the parallel rays of light falling on it. It diverges the parallel rays of light falling on it. 3. It has a real focus. … Read more
S.N Heat Temperature 1. It is a form of energy which gives us sensation of warmth. It is a measure of degree of hotness or coldness of body. 2. It is the cause of change in temperature. It is the effect of heat. 3. It is measured by calorimeter. It is measured by thermometer. 4. … Read more
S.N Nuclear fission Nuclear fusion 1. The reaction in which a single heavy nucleus splits into two or more light nuclei is called nuclear fission reaction. 0n1 +92U235 → 56Ba141 +36Kr92 +30n1 + E The reaction in which two or more light nuclei combine to form a single heavy nucleus is called nuclear fusion reaction. … Read more
Fertilized ovary is called fruit. It has two parts i.e. fruit wall or pericarp and seeds. Pericarp is made up of three layers epicarp, mesocarp and endocarp. Fruits might be true fruits and false fruits. True fruit develops from ovary and false fruit develop from any part other than ovary. Types of fruits: Fruits are … Read more
The arrangement and distribution of flowers over a plant is called inflorescence. The axis of inflorescence is called peduncle. A flattened peduncle is known as receptacle. It is of five types: solitary, racemose, cymose, mixed and specialized. Types of inflorescence 1) Solitary Flowers occur singly or separate from other flowers. It is of two types: … Read more
S.N Scientific name Common name Edible part Fruit type 1. Pisum sativum Garden pea Seeds Legume 2. Abelmoschus esculentus Lady’s finger Entire fruit Capsule 3. Anacardium occidentale Cashew nut Cotyledons and fleshy thalamus Nut 4. Litchi Litchi Aril Nut 5. Trapa Water chestnut Seeds Nut 6. Arachis hypogea Ground nut Seeds Lomentum 7. Mangifera indica … Read more
Leaves of plants are modified to various structures for adaptation to the environment where they are present. Some of the modifications are listed as below: 1) Leaf tendrils: Tendrils are thread like sensitive structures, which can coil around a support to help the plant in climbing. They are of following types: i) Whole leaf tendrils: … Read more
1. Diagnostic features : Mostly herbs, rarely shrubs or trees, often climbing. Leaves alternate, stipulate, simple, or imparipinnately compound. Flowers bisexual, zygomorphic, corolla papilionaceous, aestivation descending- imbricate, posterior petals outermost, stamens 10 or 9, monadelphous or diadelphous, rarely free. Gynoecium monocarpellary, unilocular with marginal placentation. Fruit a legume or pod. 2. Distribution : Includes about 482 … Read more