pteridophytes nutrition source

'Auto' means self and 'trophic' refers to food. So, the organisms which synthesise their own food are called the autotrophs and the process is called autotrophic nutrition. Autotrophs include all green plants and some bacteria such as the nitrifying bacteria. The source of energ..

Introduction - The plants upon which we depend for the food we eat, and for the oxygen we breathe, depend in turn upon the soil. A good soil supplies the plants with the mineral elements they use. Vigorous, highly productive plants can be grown in solutions of fertilizer minerals in the absence of ..

Man is an omnivore. He depends on both plants and animals for food. In the previous chapter we studied about crops being the major source of our food. In this chapter, let us study about animal sources of food. Animal sources include eggs, meat, milk and fish. Eggs and..

Introduction - Man is an omnivore. He depends on both plants and animals for food. In the previous chapter we studied about crops being the major source of our food. In this chapter, let us study about animal sources of food. Animal sources include eggs, meat, milk and..

Question: What are the various modes of nutrition? Answer: The two main methods of nutrition are autotrophic and heterotrophic. These are further divided into different types as follows: Autotrophic nutrition In this type, the organisms synthesize their own..

Photoautotrophic organisms synthesize food with the help of light energy of the sun, carbon dioxide and water. The process of synthesis of food in this method is called photosynthesis, which will be dealt later in this chapter. For example: cyanobacteria (blue-green bacteria, prokaryotes) algae and..

As a result of fertilisation, the following changes are observed in a flower: 1. A diploid zygote is formed and develops into an embryo which is the future plant. 2. The triploid endosperm tissue serves as a source of nutrition for the developing embryo. 3. The ovule becomes s..

The Indian fauna includes variety of animal life such as mammals, birds, reptiles, fishes, insects etc i.e. about 800 species of mammals, 2000 species of birds, 420 species of reptiles, 2000 species of fish, 50,000 species of insects, 4000 species of molluscs (Source K.C.Agarwal, 1998). T..

In the modern system of classification, living organisms are grouped under five kingdoms, as proposed by Whittaker (1966). The Kingdom Monera includes bacteria and blue green algae, both of which possess prokaryotic cells. Bacteria are unicellular prokaryotes that have a wide distribution, ..

Vitamins are nutrients which are essential to life. They are organic compounds needed in small quantities, necessary for the healthy growth and maintenance of the body. Vitamins are found in all kinds of foods but, vegetables and fruits are particularly rich in vitamins. Based on solubility, vitam..