Flashcards
LIFE SCIENCE 3
Cards in this deck (22)
- 1LIFE SCIENCE 3WELCOME TO CHAPTER 3
- 2LIVING ORGANISMSliving organisms are made of cells.cells are the basic units of life made by living matter called protoplasm.living organisms are identified fom non-living to living organisms .there are seven basic processes of life which can be remembered using the seven letter word merring .
- 3MERRINGm~movement
e~excretion
r~reproduction
r~respiration
i~irratibility(sensitivity)
n~nutrition
g~growth - 4MOVEMENTis the ability of livng organisms to change position using energy from respiration
- 5EXCRETIONis the process whereby living organisms remove waste susbstances produced witjin the body
- 6RESPIRATIONis the chemical breakdown of food mainly carbohydrate in living organisms to release energy
- 7REPRODUCTIONthe process whereby living organisms produce young ones (offspring) similar to them
- 8IRRITABILITY( OR SENSITIVITY)being able to sense stimulus and respond to it accordingly
- 9NUTRITION(OR FEEDING)the process whereby living organisms take in food to maintain life
- 10GROWTHthe increase of living matter (protoplasm) and the number of cells in a living organism
- 11THE VARIETY AND CLASSIFICATION OF LIVING ORGANISMS#cellular structure~some are unicellular(made of one cell)and others are multi-cellular(made of many cells)
#presence of chlorophyll~plants have chlorophyll(green pigment)
#flowering (for plants only)
#backbone(for aniamls only) - 12DIFERRENCES BETWEEN PLANTS AND ANIMALS *PLANTS#have a green pigment called chlororphyll
#make their own food by photosynthesis
#little movement limited growth
#have fixed positions - 13*ANIMALS#have no chlorophyll
#feed on food made by plants
#move about from one place to another
#have no fixed position - 14VERTEBRATES AND INVERTEBRATES *VERTEBRATES#animls have backbones
#skeleton covered by flesh(endoskeleton)
#body not segmented
#xample are mammals,bird,reptiles,fish,amphibian - 15*INVERTEBRATES#animals without backbones
#skeleton outside flesh(exoskeleton) or support is by fluids (hydroscopic)
#have segmented body
#examples are worms ,molluscs(snails),arthropods - 16ARTHROPODAare the largest group of animals on earth.they belong to the group of animals called invertebrates.the term arthropod means jointed legs and it forms a phylum called arthropoda,a group of classes of living organisms sharing a common charecteristic of jointed legs
- 17THE PHYLUM ARTHROPODA#insecta
#crustacea
#arachnida
#chilopoda
#diplopoda - 18INSECTA#two pairs of wings
#body divided into head ,thorax and abdomen
#one pair of antenna
#one pair of compound eyes
#six legs divided into 3 pairs
#have special piercing mouth for sap-sucking insects and biting jaws for tissue-eating insects eg.locust ,housefly,mosquito - 19CRUSTACEA#body divided into two regions
#mostly aquatic arthropods
#body covered by a hard exoskeleton
#have two pairs of compound eyes
#have two pairs of antennae
#have 5 pairs of legs or more eg.woodlice ,crabs,lobsters - 20ARACHNIDA#body divided into 2 regions,cephalothorax(head and thorax of 6 segmants) and abdomen(13 segments)
#4 pairs of legs attached to the cephalothorax
#no antennae eg.spiders,scorpions,mites - 21MYRIAPODA *CHILOPODA(CENTIPEDES) HUNDRED LEGS# have longer legs than millipedes and can move faster
#belong to ghe class chilopoda (miriapods with one pair of legs per segment)
#have a pair of poisonous claws injecting poison onto their prey (victim)
#body flattened in cross-section - 22*DIPLODOPDA(MILLIPEDES) THOUSAND LEGS#legs are shorter than those of chilopoda and moves slower than centipedes
#legs adapted for burrowing through humus and soil
#belong to the class diplopoda (miriapods with two pairs of legs per segment)
#rounded body in cross-section