Download B3 - Life on Ea

Explain what a mutation is, how it
can happen and what it causes.
Explain what the word
“variation” means and
how it is caused. Give
examples in your answer
How are sustainability
and biodiversity linked?
Give three ways carbon can be released into the atmosphere
Give two ways carbon can be removed from the atmosphere
What is nitrogen used for in plants and animals?
Explain how humans can cause the
extinction of species
a) Directly
What is meant by
“classification”?
b)
Name two types of
evidence we can use to
support the theory of
evolution.
Describe one loop of the nitrogen cycle using these words:
Nitrogen-fixing, nitrates, soil, atmosphere, nitrogen, denitrifying,
bacteria.
Indirectly
B3
Life on Earth
Explain energy loss in food chains
and how this limits the length of a
food chain.
List the FIVE factors that
could lead to extinction
(PACED)
Add notes and diagrams
to make it useful
How can nitrogen get into the soil
a) Naturally
b) Via humans
What are the similarities and differences
between natural selection and selective
breeding?
Ultimately, where does all our
energy come from?
Give an example of an adaptation
and how it has helped that plant or
animal to survive.
Draw a diagram to show how all hominids had a
common ancestor.
What are the four stages
in natural selection?
Explain each one.
What three things were problems with Darwin’s theory of natural selection? How have they been
overcome now?
What are the similarities and differences between Lemarck and Darwin’s theories of evolution?
What is a hominid?
Give 2 ways in which big brains
helped early humans to survive.