All living organisms grow. Increase in mass and increase in numberof individuals are twin characteristics of growth. A multicellular organismTHE LIVING WORLDCHAPTER 11.1 What is ‘Living’?1.2 Diversity in theLiving World1.3 TaxonomicCategories1.4 TaxonomicalAids2019-20204 BIOLOGYgrows by cell division. In plants, this growth by cell division occurscontinuously throughout their life span. In animals, this growth is seenonly up to a certain age. However, cell division occurs in certain tissues toreplace lost cells.

When we try to define ‘living’, we conventionally look for distinctivecharacteristics exhibited by living organisms. Growth, reproduction, abilityto sense environment and mount a suitable response come to our mindimmediately as unique features of living organisms. One can add a fewmore features like metabolism, ability to self-replicate, self-organise,interact and emergence to this list. Let us try to understand each of these

Unicellular organisms grow by cell division.

3.   a. Name one organisms that exhibits both plant and animal features      (1 mark)b. State three (3) animal features and two (2) plant features possessed by thenamed organism in 3(b) above                          (5 marks)c. Differentiate between a living and non-living thing in four ways.       (4 marks)d. Explain the complexity of organization of life forms in    higher organisms.    (10 marks)

When you look around, you see both living and non-living things. Youmust have wondered and asked yourself – ‘what is it that makes anorganism living, or what is it that an inanimate thing does not have whicha living thing has’ ? The answer to this is the presence of the basic unit oflife – the cell in all living organisms.All organisms are composed of cells. Some are composed of a singlecell and are called unicellular organisms while others, like us, composedof many cells, are called multicellular organisms

Differentiate between unicellular and multicellular organisms. (three points)