Bio Notes

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Outline the impact on the evolution of plants and animals

a) Changes in the tangible conditions in the environment:
& turd; Mass extinctions suffer resulted from carnal changes
& slob; Sea levels have risen and fallen; separate of Australia were covered by oceans or were dry land.
• betimes Earth’s composition was of basic organism make blocks, amino acids, sugars, ammonia, methane and water.
• The coming together of the continents, forming Pangaea (200million yrs ago)
- 90% of marine mammals became extinct.
• The dinosaurs that roamed 150 mil yrs ago are straightway extinct.
LIFE ON EARTH HAS SURVIVED BY CHANGE, EXTINCTION AND DIVERSITY
• Australia’s climate was warmer with unsparing vegetation imagination now its dry and arid.
• As Australia drifted north, the continent became air-dried and soils poorer.

b) Changes in chemical conditions: these are all influenced by well-nigh major factors…and coming back
• Early Earth had no oxygen present.
• Primitive organisms produced CO2
• After 1 million years organisms began to use the CO2 - producing oxygen as a product of their metabolism.
• As life change the chemistry of the atmosphere, so too the chemical changes affected evolution.




- We have used pesticides to eradicate pests however, they are now immune.
- The use of antibiotics to hide bacteria caused disease – has now become less effective.

c) tilt for resources:
• Plants compete for resources – light, soil, nutrients and water.
• Initial conditions favored lush forest, this changed as condition became drier.
• When dinosaurs dried out, mammals had few conditions and change to occupy a variety of ecosystems.
• Long-term contender usually results in the elimination of one of the species.

a) Paleontology:

• Fossils are traces of dead organisms, and...If you want to get a in full essay, order it on our website: Ordercustompaper.com



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