Of the several gases in atmosphere, plant life mostly depends upon
Concentration of $O_2$
Availability of $CO_2$
Both $ (a) $ and $ (b)$
Concentration of $N_2$
It’s obvious.
Which element is responsible for causing soil salinity ? At what concentration does the soil become saline ?
Which of the following is not a biotic component
In most animals, the metabolic reactions proceed in a …$A$… temperature range (in humans, it is $37^{\circ} C$ ). But there are microbes (archaebacteria) that flourish in hot springs and deep sea hydrothermal vents where temperature far exceed …$B$…
Choose the correct option for $A$ and $B$
Ravi, who lived at sea level, had around $5$ million $RBC$ per cubic millimeter of his blood. Later when he lived at an altitude of $18,000 ft$, showed around $8$ million $RBC$ per cubic millimeter of blood. This is an adaptation because
When young plants are grazed too heavily, they get killed because of
Confusing about what to choose? Our team will schedule a demo shortly.
