1.
What is the system formed by the living beings on Earth and the relationships that are established between them and their environment?
A
biosphere
B
atmosphere
C
geosphere
2.
The gaseous layer that covers the Earth, protects it from harmful radiation, propitiates a temperature that is suitable for life and provides essential nutrients, such as N2, O2 or CO2 is...
A
atmosphere
B
geosphere
C
hydrosphere
3.
The main bioelements are:
A
C, H, O, N
B
Si, Al, Fe, O
C
H2O, CO2
4.
It is an inorganic biomolecule:
A
B
C
5.
This is the water molecule (inorganic biomolecule)
