Both plants and animals use…..for respiration.
a) nitrogen
b) carbon
c) water
d) oxygen
All organisms use oxygen in their respiration process to get……..
a) food
b) fuel
c) energy
d) all of these
Carbon Cycle:
The
carbon cycle is nature's way of reusing carbon atoms, which travel from the
atmosphere into organisms in the Earth and then back into the atmosphere over
and over again. Most carbon is stored in rocks and sediments, while the rest is
stored in the ocean, atmosphere, and living organisms.
Carbon is
constantly being removed from and released into the environment in the form
of.…
a) carbonates
b) carbon dioxide
c) bicarbonates
d) carbon
monoxide
The amount of carbon dioxide in atmosphere is………%.
a) 0.04
b) 21
c) 78
d) 0.9
Plants absorb carbon dioxide to make ……..by the process of photosynthesis.
a) organic food
b) urea
c) nitrates
d) all of these
