Which of the following is correctly matched?
Stratification :- Structural component of ecosystem (2) Aerenchyma :- Feature of hydrophytes (3) Age pyramid :- Food chain (4) Parthenium hysterophorus :- Exotic species do not that allow the growth of other plants near it.
If '+' sign is assigned to beneficial interaction, '–' sign to detrimental and '0' sign to neutral interaction, then the population interaction represented by '+' '–' refers to
Which of the following is correct for r-selected species?
The primary producers of the deep-sea hydrothermal vent ecosystem are
How many hot spots of biodiversity in the world have been identified till date by Norman Myers?
Which kind of therapy was given in 1990 to a four-year-old girl with adenosine deaminase (ADA) deficiency?