Variety of Life Is It Alive? How do you know if something if alive or not?
There are seven life processes (MRS GREN): Movement Respiration Sensitivity Growth Reproduction Excretion Nutrition MRS GREN Movement- we need to move around to get food, plants can move their leaves towards sunlight Respiration- both plants and animals take in Oxygen from the air to release energy Sensitivity- we are all sensitive to the cold, acidity etc. MRS GREN Growth- We all grow up (and out!)
Reproduction- All living things make more of themselves Excretion- Getting rid of waste e.g. we breathe out Carbon Dioxide Nutrition- Eating (plants take in nutrients from the ground) Organisms Organism means living thing There are two big groups: Plants
Animals There are also bacteria and viruses that make us sick Classification Carl Linnaeus, a Swedish scientist came up with the classification system Organisms are placed in groups if they are similar to each other Animals Animals can be divided into: vertebrates (have a backbone)
invertebrates (no backbone) Which group do we belong to? Vertebrates Which group do worms belong to? Invertebrates Vertebrates There are five groups (BFARM): Birds Fish Amphibians
Reptiles Mammals Weird Mammals Dolphins- they have lungs A Bottlenose Dolphin Weird Mammals Whales- have lungs Killer Whales Weird Mammals The Blue Whale- the largest animal Weird Mammals Bats- they are related to rodents Reptiles The Tortoise live on land Reptiles Turtles live in water The Green Sea Turtle Birds Emperor Penguins are one of the few organisms to live in Antarctica Amphibians The Fire salamander can re-grow legs that have been cut off Amphibians The poison dart frog is lethal to humans Fish Sharks are fish, they have gills The Great White Shark Annelids These are Earthworms and leeches They are invertebrates
They have rounded bodies Their body is segmented Arthropods This big group (phylum) of ancient invertebrates include smaller groups (classes) of insects, spiders, millipedes and crabs They have a hard body It is divided into segments They have jointed legs Arachnids They have 8 legs Two body parts and no wings Insects They have 6 legs and two pairs of wings
They have 3 body parts: Thorax Head The Damselfly Abdomen Insects (Stag Beetle) Head Thorax Abdomen Molluscs These are slugs, snails, squid and the octupus
They have soft bodies with a head and a muscular foot Plants These are divided into:
Flowering plants (conifers and seed producing flowers) Non-flowering plants (Algae, ferns and mosses) Non-Flowering Plants Algal bloom on a river Flowering Plants This Passion Flower makes seeds Keys This is a question key
It can be used to separate organisms according to their characteristics Can you name the invertebrate A, B, C and D A= Ant B= Mite C= Spider D= Mayfly Diagram Keys