chapter 12 section 3
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Chapter 12 Section 3. Life Invaded the Land. Grade 10 Biology Spring 2011. Ojectives. Relate the development of ozone to the adaptation of life to the land Identify the first multicellular organisms to live on land Name the first animals to live on land - PowerPoint PPT PresentationTRANSCRIPT
Life Invaded the Land
Chapter 12 Section 3
Grade 10 BiologySpring 2011
OjectivesRelate the development of ozone to the
adaptation of life to the land Identify the first multicellular organisms to
live on land Name the first animals to live on land List the first vertebrates to leave the
oceans
The Ozone Layer______ provides life giving light and
dangerous ___ lightEarly in Earth’s history, life formed in the
_____, where early organisms were ___________ from _____________
Formation of Ozone LayerAbout 2.5 million years ago, photosynthesis by
__________ began adding _________ to Earth’s ____________
As oxygen began to reach upper atmosphere, the sun’s rays caused some of molecules of ________, 02, to chemically react and form molecules of __________, 03
In the upper atmosphere, _______ ______ the ___ radiation of the sun
After millions of years, enough ______ had accumulated to make the Earth a safe place to live
Plants and Fungi on LandFirst _____________ organisms to live on land
may have been ______ living together with __________________
Each possessed a quality needed by the other
Plants and Fungi on LandPlants: likely evolved from _________
Could carry out ___________________In photosynthesis: plants use energy
from ______ to make ___________Plants cannot harvest needed _________
from bare rock Fungi cannot make nutrients from _________
but can absorb minerals from bare rock
Plants and Fungi on Land____________: symbiotic associations
between fungi and the roots of plantsFungus provides minerals to plant, plant
provides nutrients to fungus _____________: relationship between two
species in which both species benefit Plants and fungi began living together on
the surface of the land about 430 million years ago
Arthropods_____________: first animals to successfully
invade land from sea Hard outer ______, segmented body, and
paired, jointed limbs Ex. Lobsters, crabs, insects, spiders
_______ have become the most plentiful and diverse group of animals in Earth’s history Insects have the ability to ____ Partnership between _____ and _______
Vertebrates ___________: animal with a
backbone Ex. Humans
Fishes First vertebrates were
small, ________ fishes that evolved in the oceans about 530 million years ago
____ enable fish to bite and chew their food instead of sucking up their food
Became most _______ animals in sea
Vertebrates _____________: first vertebrates to inhabit
the land Smooth skinned, four legged animals Ex. ___________________________________Had moist breathing sacs –_________- which
allowed the animals to absorb __________ from air
_______ of amphibians are thought to have derived from bones of fish fins
Vertebrates _________: evolved from
amphibian ancestors about 340 million years ago Snakes, lizards, turtles, and
crocodilesReptiles are better suited to
_______ than amphibians because reptiles water tight skin slows the loss of __________
Have watertight eggs, can lay eggs on ___________
Mammals and Birds_________: evolved from feathered
dinosaurs during or after the Jurassic period _________: evolved from therapsids (reptiles
with complex teeth and legs positioned beneath their body) gave rise to mammals about the same time dinosaurs evolved
Mammals and BirdsAll of the dinosaurs except _______ of birds
became _______ Smaller reptiles, mammals, and birds
__________There were many __________ available to
the surviving animals, the world’s climate was no longer largely _____
Reptile’s _________ in dry climates were not so important
Birds and mammals then became the ________ vertebrates on land
Continental DriftBoth extinctions and continental drift
played important roles in evolution _______________: movement of Earth’s land
masses over Earth’s surface through geologic timeResulted in present day position of
continents