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Description
Flashcards by Kate FRANCINETH Bauleth, updated more than 1 year ago
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Created by Kate FRANCINETH Bauleth
over 7 years ago
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| Question | Answer |
| LIFE SCIENCE 3 | WELCOME TO CHAPTER 3 |
| LIVING ORGANISMS | living 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 . |
| MERRING | m~movement e~excretion r~reproduction r~respiration i~irratibility(sensitivity) n~nutrition g~growth |
| MOVEMENT | is the ability of livng organisms to change position using energy from respiration |
| EXCRETION | is the process whereby living organisms remove waste susbstances produced witjin the body |
| RESPIRATION | is the chemical breakdown of food mainly carbohydrate in living organisms to release energy |
| REPRODUCTION | the process whereby living organisms produce young ones (offspring) similar to them |
| IRRITABILITY( OR SENSITIVITY) | being able to sense stimulus and respond to it accordingly |
| NUTRITION(OR FEEDING) | the process whereby living organisms take in food to maintain life |
| GROWTH | the increase of living matter (protoplasm) and the number of cells in a living organism |
| THE 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) |
| DIFERRENCES BETWEEN PLANTS AND ANIMALS *PLANTS | #have a green pigment called chlororphyll #make their own food by photosynthesis #little movement limited growth #have fixed positions |
| *ANIMALS | #have no chlorophyll #feed on food made by plants #move about from one place to another #have no fixed position |
| VERTEBRATES AND INVERTEBRATES *VERTEBRATES | #animls have backbones #skeleton covered by flesh(endoskeleton) #body not segmented #xample are mammals,bird,reptiles,fish,amphibian |
| *INVERTEBRATES | #animals without backbones #skeleton outside flesh(exoskeleton) or support is by fluids (hydroscopic) #have segmented body #examples are worms ,molluscs(snails),arthropods |
| ARTHROPODA | are 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 |
| THE PHYLUM ARTHROPODA | #insecta #crustacea #arachnida #chilopoda #diplopoda |
| INSECTA | #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 |
| CRUSTACEA | #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 |
| ARACHNIDA | #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 |
| MYRIAPODA *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 |
| *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 |
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