A farmer harvests his crop and expresses his harvest in three different ways.

$(a)$ I have harvested $10$ quintals of wheat.

$(b)$ I have harvested $10$ quintals of wheat today in one acre of land.

$(c)$ I have harvested $10$ quintals of wheat in one acre of land, 6 months after sowing.

Do the above statements mean one and the same thing. If your answer is yes, give reasons. And if your answer is ‘no’ explain the meaning of each expression.

$A-80\%$ of total global carbon is dissolved in ocean.

$R$- dry weight of organisms have $49\%$ carbon.

Which ecosystem has the maximum biomass ?

Succession proceeds from

Choose the correct sequence of transitional communities in Xerarch succession.