Biology
1.B
2.B
3.D
4.A
5.C
6)
a) the arrows show us food chain.
b) grass or lady smock.
c) lady smock
d) 1)grass
grass
2) lady smock
grass
caterpillar
robin
short-tailed field vole
rabbit
fox
fox
caterpillar
rabbit
kestrel.
short-tailed field vole
fox
fox
If short- tailed field voles will decreasing, the foxes only eat rabbits. As a result,
the number of rabbits decreases.
7) a)
Approximately 0.04% of the air is carbon dioxide. This gas diffuses into plants
through their stomata , and is used to make glucose in the process of
photosynthesis.
Animals eat plants, and some of the carbon atoms in the glucose become part of
molecules such as starch in their bodies. When the animals die, their bodies are
broken down by decomposers.
Plants, animals and decomposers return carbon dioxide to the air through
respiration.
b) Fossil fuels are formed when the residues are not completely decomposed.
And the fossils formed to carbon dioxide as a result of combustion.
1
8)
Barrcuda (carnivore)
3
Grouper (carnivore)
4
Surgeon fish(herbivore)
5
Parrot fish(herbivore)
7000
Sea fans (herbivore)
500
Seaweed(producers)
700
10000
Algae on the sea bed(producers)
Phytoplankton(producers)
9) a) They are ammonia acid; carbon; hydrogenium.
b) Nitrogen can be found in the air. Its unique gas that is simultaneously
converted into protein in plants.
C)
INCREASING OF POPULATION
NOT GROWN
ii)The soil there may be interfile. So the seeds can’t grow there.