The components of a soil are
Inorganic and organic components
Water and air
Livings
All the above
Positively photoblastic seeds germinate only in presence of
How many number of pairs are correct?
$(1)$ Aves - eurythermal
$(2)$ Mammals - stenothermal
$(3)$ Amphibia - stenothermal
$(4)$ Reptile - eurythermal
If there was no $CO_2$ in the earth’s atmosphere, the temperature of earth’s surface would be
A characteristic which enables an organism to live in an environment is called
Deforestation has an alarming effect on