Biology - Chapter 1: Characteristics and classification of living organisms

Kingdoms

Animal, Plants, Fungi, Protoctists and Prokaryotes

Characteristics of living organisms

Movement, Reproduction, Sensitivity, Growth, Respiration, Excretion and Nutrition. (MRS. GREN)

Movement

An action by an organism or part of an organism causing a change in position or place.

Respiration

Is the chemical reaction that breaks down nutrient molecules in living cells to release energy for metabolism.

Sensitivity

The ability to detect or sense stimuli in the internal or external environment and to make appropriate response.

Growth

A permanent increase in size and dry mass by an increase in cell number or cell size or both.

Reproduction

Is the process that makes more of the same kind of organism.

Excretion

The removal of toxic material, waste products of metabolism (chemical reaction in the cells including respiration) and substances in an excess of requirement.

Nutrition

defined as obtaining of food to provide energy and substances needed for growth, development and repair.

Species

Is defined as a group of organism that can reproduce fertile offsprings

Linnaeus's System of classification

Kingdom ---> Phylum ---> Class --->Order ---> Family ---> Genus ---> Species.

Binomial System

Genus (first name and capital) and Species (second name and lowercase)

Main Features in animals

Multicellular
Cells contain a nucleus but no cell wall or chloroplast
They feed on organic substances made by other living organisms.