TAMILNADU COMPETITIVE EXAMS

Hi guys.This is my new post on living world.If you haven't read the previous ones,use the links mentioned below Click here to  read living world Part 1 Click here to  read living world Part 2 In this article,we will see in detail about the topic 'living world' beyond NCERT limits.To read the brief notes on NCERT limits,click on the above mentioned links •Growth can be of two types Intussusception -addition of materials inside the body Accretion -addition of materials on the outside Substances added can also be of two types Protoplasmic substances -components of living matter Apoplamic substances -non living materials Growth cannot be a defining character for living •Metabolism can be of two types Catabolism -breaking down,release energy Eg:Respiration Anabolism -building up,consume energy Eg:Photosynthesis Metabolism can be considered as a defining character   Some important binomial names Allium cepa - Onion Triticum ...

Hi guys,I will post the questions and answer is given at the end of this post.If you have not read the notes,click on the below link To read,  Living world-Part 1,click here To read,  Living World-Part 2,click here To read, Living world-BEYOND NCERT,click here To view NCERT BOOK pdf, click here to view the pdf 1.As we go from species to kingdom in a taxonomic hierarchy, the number of common characteristics a)   will decrease b)  will increase c)  remain same d)  may increase or decrease 2.Which of the following ‘suffixes’ used for units of classification in plants indicates a taxonomic category of ‘family’. a)  - ales b)  - onae c)  - aceae d)  - ae 3.The term ‘systematics’ refers to: a)   Identification and classification of plants and animals b)   Nomenclature and identification of plants and animals c)   Diversity of kinds of organisms and their relationship d)  ...

Hi guys,let's continue.If you have not read the Part 1  click here to read Part 1 To see the NCERT book , click here to view NCERT book for this lesson Taxonomic categories:  The category is a part of overall taxonomic arrangement and it is called the taxonomic category and all categories together constitute the taxonomic hierarchy. Each category, referred to as a unit of classification, in fact, represents a rank and is commonly termed as taxon (pl.: taxa). Remember, groups represent category. Category further denotes rank. Each rank or taxon, in fact, represents a unit of classification. These taxonomic groups/ categories are distinct biological entities and not merely morphological aggregates. The taxonomic categories are This can be remembered with the clue ' King Play Cards on Flat Green Stool  ' The points you must remember are from species to kingdom(ascending order)- specificity/common character decreases from species to kingdom(ascending or...

Hi guys.Let's start with THE LIVING WORLD. In this article,I will share some important concepts in Living world within NCERT Limits. What is LIVING? When we try to define ‘living’, we conventionally look for distinctive characteristics exhibited by living organisms. Growth, reproduction, ability to sense environment and mount a suitable response come to our mind immediately as unique features of living organisms All living organisms grow. Increase in mass and increase in number of individuals are twin characteristics of growth . In plants,this growth occurs continuously where as it is limited by certain checks in animals. However, cell division occurs in certain tissues to replace lost cells.But, unicellular organisms multiply by cell division. Even non-living things like sand mounds,mountains and boulders grow.So, it cannot be considered as a defining character for living Reproduction refers to the production of progeny possessing features more or less si...