Growth Meaning and definition of growth : Growth is an important properties of all living organisms. All organisms grow from a young stage to an adult stage. Growth is a permanent increase in dimensions of the body and its …
Reproduction is the process of formation of new individuals from pre-existing ones. It is the means of multiplication and perpetuation of the species because the older individuals of each species undergo senescene and die. There are two basic types …
Pollen embryoids were discovered by (a) Guha and Maheshwari (b) Steward and White (c) Konar and Natraja (d) Nitsch and Skoog The embryo may arise either from egg or some other cell of gametophyte in (a) Vegetative reproduction (b) Recurrent …
Growth can be defined as a vital process which brings about irreversible permanent change in any plant or its part with respect to its size, form, weight and volume. Regions of growth : In unicellular plants there is overall growth …
Reiter first used the term ecology in 1868. Ernst Haeckel (1886) first correctly defined ecology as “the science dealing with reciprocal relationship of organisms and the external world”. Prof. R.Misra is known as “Father of ecology in India”. Other …
Ecological plants groups Water as an important ecological factor was first recognized by Warming. On the basis of water requirement plants are divided in to 3 major types : (1) Hydrophytes : They live in abundance of water. They …
The word ecosystem was coined by A.G. Tansley in 1935. According to Odum an ecosystem is the basic fundamental unit of ecology which includes both the organisms and the non–living environment each influencing the properties of the other and …
Change in physical, chemical or biological characteristics of air, water and land that has the potentiality to harm human life, lives of other desirable species, industrial processes, living conditions, cultural assests and natural resources is called pollution. Pollutant : Pollutant …
Anything which is useful to man or can be transformed into a useful product or can be used to produce a useful thing can be referred to as a resource. A natural resource is the resource obtained from nature. …
Biome Definition : Each of the major terrestrial ecosystems or distinctive terrestrial areas with their group of climax plants and associated animals constitutes biomes. A biome is the largest terrestrial community. Rainfall, temperature range, nature of soil, barriers, latitude …
Biodiversity and Wild Life Conservation Endemic plants are those which are [BHU 1978; CPMT 1999] (a) Cosmopolitan in distribution (b) Restricted to certain area (c) Found in arctic region (d) Gregarious in habit Earth Summit at …
The ‘‘environment as a self sustaining system’’ is mainly preserved by (a) Man (b) Animals (c) Trees (d) Wild life The worst dangerous threat to wild life is by [Pb. PMT 2000] (a) Habitat destruction (b) …
, Biodiversity The term ‘biodiversity’ refers to ‘the variety and variability among living organisms and the ecological complexes in which they occur’. If you observe a patch of forest, you may find a wide variety of plant and animal life. …
The biomass can be used to [CBSE PMT 1992] (a) Obtain alcohol (b) Generate biogas (c) Generate producer gas (d) All of these The economically friendly measure to conserve solar energy is [CBSE PMT 1999] (a) Sugarcane plantation (b) Energy …
The energy obtained from biological sources is called bioenergy. Bioenergy is the use of biomass (organic matter) to produce electricity, transportation fuels or chemicals. Bioenergy sources include agriculture and forestry residues and the organic components of municipal and industrial …
Maximum utilization of the techniques of biotechnology has been made in the field of (a) Agriculture (b) Medicines (c) Industries (d) Biogas production By the use of biotechnology, in which bacteria production of B2 vitamins has been increased …
Study of use of living organisms and the substances produced due to their activities is called biotechnology. Mostly micro-organisms are used in many industries as alcohol, enzymes, vaccines, vitamins, antibiotics, organic acids, etc. So biotechnology is controlled use of …
Which is more suitable for germplasm collection (a) Centre of production (b) Homelands (c) Tropical areas (d) Temperate areas Tropical forests are being lost at the annual rate of (a) 11 million ha/yr (b) 110 million ha/yr (c) 1 …
Protection of conservation of genetic resources (i.e., all the various types of genes present in the different varieties of a species which have been, are being or likely to be used in the improvement of domesticated plants) is called …
? Sporeine developed in Germany is first commercial bioinsecticide obtained from Bacillus thuringenesis. ? Red squill (Urginea maritima) produce a raticide harmles to other animals. ? Juvenile Hormone : spray prevents larvae to metamorphose. They die without reproduction. ? Male …
Types of manures are (a) Farmyard, composited and green (b) Green and farmyard (c) Green and composited (d) Farmyard and composited BGA is chiefly used as fertilizer in [MP PMT 1995; Pb. PMT 1998] (a) Wheat (b) Paddy (c) …
Fertilizers of biological origin are called biofertilizers. These provide the essential elements to the soil and hence maintain or increase the soil fertility. Use of these biological fertilizers is safe both economically as well as ecologically. There are two …
. Cereals, pulses, fruits, vegetables and nuts Broom corn is obtained from (a) Panicum (b) Borassus (c) Attalia (d) None of the above Whose fruits are narcotic in nature (a) Jatropha (b) Opium (c) …
Which of the following is called “Dhaan ka Katora” (a) Gwalior (b) Indore (c) Chhattisgarh (d) Rewa Trigonella foenum graecum belongs to family (a) Solanaceae (b) Apocyanaceae (c) Papilionaceae (d) None of the above Mud-ball technique for rice cultivation has …
(c) Belladona drug is obtained from the leaves of Atropa belladona plant. In leaves contains several alkaloids which is atropine, used to dilate pupil of the eye. (a) Withania somnifera is the botanical name of Ashwagandha belong to family salanceae. …
Cereals : These are the members of family Gramineae and grown for their edible seeds. They are characterised by the presence of caryopsis a type of fruit in which seed wall becomes fused with the ovary to form the …
Process of hybridization is difficult because of (a) Susceptibility to mutations (b) Incompatibility and sterility (c) Selection of suitable parents and hybrids (d) All the above The method of growing micro-organisms as a thin layer on …
After the evolution of man and from the time of his origin, he has been basically a hunter of animals and gatherer of plant products for his food. He lived in small groups, following a nomadic way of life. …
Opium‘ is an extract of (a) Cannabis sativa plant (b) Cocoa plant (c) Unripe fruit of poppy plant (d) None of the above ‘Charas‘ is a product of (a) Cannabis sativa (b) Cannabis …
‘Chicken pox‘ is caused by [CBSE PMT 1992] (a) Adeno virus (b) Varicella virus (c) SV–40 virus (d) Bacteriophage T-2 Out of the following one disease is caused by virus [DPMT 1974; CPMT 1979] (a) Malaria …
n Addison’s disease is characterised by [CBSE PMT 1991] (a) Elongation of limb bones and jaw becomes broad (b) Hypertension and enlargement of thyroid (c) Loss of appetite, vomitting, muscular weakness, lowering of BMR, blood pressure and …
Diseases are classified into three main types : Communicable diseases, non-communicable and genetic disorders. Communicable Diseases Meaning : The diseases which are caused by pathogens (viruses and living organisms) and readily spread from the infected to the healthy persons …
The toxic substances produced by the foreign bodies are known as (a) Antibodies (b) Allergens (c) Antigens (d) Histamine Lymphocytes secrete a protein which causes the dilation of blood vessels. The protein is (a) Pyrogens (b) Histamine …
Generally the number of vaccinations are …….. to get complete immunity (a) 2 to 3 (b) 2 only (c) 3 only (d) 4 only The cells which produce the antibodies by stimulating the B–cells are known as …
General Introduction Pesticide is (a) Food grain preservative (b) Fungus killer (c) Insect killer (d) (b) and (c) both Mostly pesticides are (a) Useful (b) Harmful (c) Beneficial (d) All the …
Which of the following pesticide is of lipophilic nature (a) 2, 4 – D (b) DDT (c) BHC (d) All the above Most of the insecticides affect on [MP PMT 2000] (a) CNS (b) …
Since the dawn of human civilization, man has been trying to improve the agriculture. Modern agriculture employs a number of chemicals for enhancing crop yield and protecting the same. Synthetic fertilizers are added to replenish the various nutrients …
Huskies are (a) Dogs (b) Yak (c) Thick furred dogs used by Eskimos (d) Nothing A milch breed of cow is (a) Haryana (b) Malvi (c) Kankrej (d) Sahiwal Buffalo is better than cow …
Honey mainly consist of monosaccharides Both the chambers contain about 7 rectangular wooden frames called comb frames arranged vertically. The vertical frames are filled with comb foundation sheet. These sheets are made of wax and contain hexagonal imprints. They are …
The rearing of animals for specific purposes is called domestication, and such animals are called domestic animals. Domestication of animals started during the ‘hunting and gathering phase’ of human civilization. Man domesticates a variety of animals for food …