survival kit for new teachers

Self Duplication and Survival - Living organisms do not survive indefinitely. Every organism dies after attaining a certain age or due to predation, disease, accident or other factors. The reduction in the number of individuals of a population as a result of death, is restored b..

Lamarck suggested that new needs arise in the organisms as the ever-changing environment influences them. Changes in the environment create a new need in the organism for adapting to that change, failing which the organism cannot survive..

An animal performs all its life functions with an aim to be alive till it matures and reproduces. Reproduction is the ability of living organisms to produce new individuals similar to themselves. Reproduction ensures perpetuation and survival of their species. It leads to ..

It is known that members belonging to closely related species do not interbreed and even if they do so they do not produce fertile young. However, very rarely, fertile offspring may result from the interbreeding of two closely related species. In such cases, the resulting offspring represents a ..

Introduction - An animal performs all its life functions with an aim to be alive till it matures and reproduces. Reproduction is the ability of living organisms to produce new individuals similar to themselves. Reproduction ensures perpetuation and survival of their species. It ..

Darwin believed that nature selects only those individuals, which have favourable variations and thereby have competitive advantage over others. This process is known as natural selection. The members of any particular species can develop and survive only when they are able to adapt them..

Effect of natural selection on the phenotype of an organism Lethal alleles in a homozygous individual carried in a heterozygote New mutations in a gene pool Variation within a species - survival under changed environmental conditions Conditions for Hardy-Weinberg equil..

Effect of natural selection on the phenotype of an organism Lethal alleles in a homozygous individual carried in a heterozygote New mutations in a gene pool Variation within a species - survival under changed environmental conditions Conditions for Hardy-Weinberg equil..

Accumulation of Variation During Reproduction - All round us we see different organisms from the lowest forms to the highest. Species differ from each other. However, the variation we focus relates to the differences among individuals of a species. No two individuals are identical to each other. Wh..

Question: You are Rajiv Menon, the Secretary of your school's Adventure Club. Your young friends have been asking you about an interesting camp to go to in the summer holidays. You come across this news item in the newspaper. Educa Tours - An Educational Management Group is conducting a se..