IGCSE Characteristics and classification

Millie Berrett
Flashcards by , created about 5 years ago

Cambridge IGCSE and GCSE Science (Biology) Flashcards on IGCSE Characteristics and classification, created by Millie Berrett on 10/20/2014.

Millie Berrett
Created by Millie Berrett about 5 years ago
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Question Answer
7 Characteristics of living organisms? (MRS GREN) Movement Respiration Sensitivity Growth Reproduction Excretion Nutrition
Define Movement Movement is an action by an organism or part of an organism causing a change of position or place.
Define Respiration Respiration is the chemical reactions that break down nutrient molecules in living cells to release energy.
Define Sensitivity Sensitivity is the ability to detect changes in the environment and react to them.
Define Growth Growth is the process by which an organism changes in size and in form. Growth is a permanent increase.
Define Reproduction Reproduction is the process that make more of the same kind of organism,Reproduction makes new organisms of the same species as the parents
Define Excretion Excretion is the removal of toxic materials,waste products of metabolism and substances in excess from organisms.
Define Nutrition Nutrition is the taking in of nutrients which are organic molecules and mineral ions to provide raw materials or energy for growth, tissue repair and reproduction.
Hierarchy of classification (Kings Play Chess On Flat Green Squares) Kingdom Phylum Class Order Family Genus Species
What is a Dichotomous key? Dichotomous keys can be branching or listed. They are simple yes or no questions Dichotomous_key.jpg (image/jpg)
What is Bacteria Bacteria are single celled organisms that have no true nucleus
Structure of bacteria Bacteria.jpg (image/jpg)
Importance of Bacteria -Some are Pathogenic (cause disease) -Some are involved in nutrient cycles -Some are exploited by humans in food production and biotechnology
What are viruses? Viruses do not show the typical features of living things. All viruses are parasites and therefore cause harm to their host.
typical virus structure virus.jpg (image/jpg)
Comparing bacteria and viruses comparing.jpg (image/jpg)
Importance of Fungi -They are decomposers and play a vital role in the nutrient cycle -they can be a source of food (mushrooms) -Used in biotechnology- brewing industry
Fungus or Plant? fungus_pr_plant.jpg (image/jpg)
What is a vertebrate? A vertebrate is and animal with a back bone. such as mammals, birds, reptiles, fish or amphibians
what is and invertebrate? An invertebrate is an animal without a back bone. Such as Nematodes, Annelids, Molluscs, Arthropods, Crustaceans, Insects, Myriapods or Arachnids
Features of a Nematode -long muscles for wriggling movements -Long, Thin body so not washed out of hosts intestine -Body covered in Mucus to resist attack from digestive juices
Features of an Annelid -Has chaetae (bristles) to help movement - Single segmented -Long, cylindrical body covered with mucus
Features of Molluscs -Shell to protect soft body from predators -Single foot-muscle with slimy covering to help movement
Arthropods Arthropods include -Crustacea -Insects -Myriapods -Arachnids
Features of an Crustacea -Jointed limbs to help with feeding -Gill under shell to allow uptake of oxygen -Thick, hardened shell for protection
Features of Myriapods -Antennae -Many body segments so body is flexible -Hard exoskeleton Waterproof body covering -
Features of Insects -Antennae -Three pairs of legs -Three segments (Head, Thorax, abdomen) -Two pairs of wings
Features of Arachnids -Head and thorax combined into 1 segment -Four pairs of legs Powerful jaws
Features of Fish -Scales covered in mucus to help streamlining for swimming -Fins for movement
Features of Amphibians -moist skin -Four limbs
Features of Reptiles -Dry, scaly skin -Tail -Has teeth or bony ridges to aid feeding
Features of Birds -Wings -Scales on legs or feet -Beak -Feathers vital for flight and insulation
Features of Mammals - Fur or hair covering the body -Teeth to allow for digestion of wide variety of food
Characteristics of Animal cell A_cell.jpg (image/jpg)
Characteristics of a plant cells A_P_cell.jpg (image/jpg)