Edexcel IGCSE Biology Section 1 - Characteristics and Variety of Living Organisms

Carolus Linnaeus

the swedish naturalist who was the first to try to classify living things.

excretion

removal from organisms of toxic materials, the waste products of metabolism and substances in excess of requirements.

growth

An increase in size of a body part or the organism

plants

autotrophic, cell wall made of cellulose, photosynthesize, multicellular

fungi

heterotrophic, cell wall made of chitin, mycelium of hyphae

bacteria

prokaryotic, unicellular, reproduce by binary fission

birds

animals with feathers and a beak

mammals

animals with fur, give birth to live young

reptilian

dry scaly skin, lungs

amphibian

moist skin, gills, lungs and skin to breathe

fish

gills, wet scaly skin

reproduction

Formation of new cells or new organisms

movement

Changing the position or location of the entire body.

sensitivity

Ability to respond to enviornment

respiration

Conversion of energy stored in glucose molecules into energy the cells can use

nutrition

Obtained from food and used by our bodies for growth and maintaining good health.

invertebrate

An animal without a backbone

Viruses

non living, parasitic, made from protein coat and DNA