Biosphere evolution: biogenesis and noogenesis
Answers are for parents and teachers.
1
Earth formed 4500 million years ago and photosynthetic life appeared 3500 million years ago. How many million years lie between?
1000
2
Why did aerobic respiration allow complex organisms to arise?
It releases much energy, which complex structure and activity require.
3
If CO2 rose from 300 ppm to 450 ppm, by what percent did it grow?
50
4
What is the anthropobiosphere? Give one example.
A biosphere sharply changed by humans; for example cities and irrigated fields.
5
Which organisms colonised land first? Write the order.
Prokaryotes → plants → arachnids and other animals → amphibians.