competition in plant

Competitive Interactions - Competitive interactions are seen more as a result of rivalry between two or more organisms, which depend on the same resource. There are two types of competitive interactions - a) Intraspecific is the struggle between the members of same spi..

a) Neither can good qualities be introduced nor can bad characters be eliminated. b) Subsequent generations show a general fall in vigour and vitality. c) Adaptability, to changed environment decreases due to the absence of variations. d) Overcrowding and severe competition among the daug..

. Among them, nutrient management techniques aim at providing sufficient nutrients at the required stage in the required form, while water management techniques aim at providing ideal situations for growth of crops. Weed management techniques aim at keeping the land weed free so that crop does not ..

2 = carnivore order-2) The food chains and other such interrelationships in the ecosystems create a balance in the environment that is called the ecological balance. Man is also a part of these food chains and webs. However, man tries to modify the environment to suit his needs unlike the other c..

It is the name given to the theory proposed by Charles Darwin (1809-1882). It is also known as the theory of natural selection. He formulated this theory along with another English biologist, Alfred Russel Wallace (1823-1913) in the year 1858. fig. 5.6 - Charles Darwin This theory is the resul..

Summary - The macromolecules found in a cell are large molecules with a complex structure and very high molecular weight. They are represented by polysaccharides, proteins and nucleic acids. Polysaccharides are polymers of monosaccharides. They are linear, branched or unbranched molecular chains. T..