Which of the following is correctly matched?
(a) Aerenchyma - Opuntia
(b) Age pyramid - Biome
(c) Parthenium hysterophorus - Threat to biodiversity
(d) Stratification - Population
(a) Aerenchyma - Opuntia
(b) Age pyramid - Biome
(c) Parthenium hysterophorus - Threat to biodiversity
(d) Stratification - Population