Transcript File
Living world review Ecosystem • This the interactions between all the Biotic (living ) and Abiotic (Non living) things in a given place and time. • Abiotic: Rocks, water, air, earth, climate, Habitat • Biotic: Food chains, breeding, adaptations, competition (for space, light, water, and food) Population • All of one (1) species • That live in the same habitat at the same time. • Populations compete for – Shelter – A mate – Food – water Niche • Special role that the species plays in its habitat • How it adapts to climate physically • How it builds its shelter • What it eats and when it eats • How it shares its food source Adaptations • • • • How fit a species is means how well it is adapted to its niche. Adaptations can be physical or behavioral They can adapt to their – food source – Habitat – Climate -communications -reproduction Success is having grandchildren • • • • • • A species Individuals that are: so similar can mate and produce fertile young in their natural habitat The more they “fit” their niche, the more children will survive and have children. • This is success in the natural world Natural selection • We call this success natural selection. • The animals with the best traits live longer • They stay warm, get enough food, and don’t get eaten. • Therefore they have more babies. • More of the successful traits get handed down • They accumulate over time • The population evolves. Which peppered moth is more likely to be eaten by Blue Jays? 1848’s: before industrial revolution NO POLLUTION! Trees are covered in lichen 98% of moths were white 2% were black 1895’s: after the industrial revolution1 Pollution kills lichen. Trees covered with soot from factories 5% of the moths were white 95% were black Taxonomy • This is how we organize all the different species. • We give each individual a scientific name • Genus species eg. Homo sapiens (You) • These are the smallest groups • The biggest groups are Kingdoms there are 5 • Animal Plant Fungus Protista Monera • You fern yeast amoeba bacteria What are the characteristics of living things • • • • • • • • Move Grow Reproduce They need energy The excrete They respond to stimuli They are made of cells This is the most important characteristic • • • • • • • • • Is a flame alive? Yes it flickers Yes it spreads Yes light a candle Yes fuel (wax or wood) Yes smoke Yes blow on a flame No therefore they are not alive. What does a cell look like? • It depends on what job they do • There are all different kinds of cells Generalized Animal cell Generalized plant cell