Water logging occurs in
Clay soil
Loamy soil
Gravel soil
Sandy soil
The organism which are present in tropical regions called
The ecologically fixed and genetically irreversed species are called
Prolonged liberal irrigation of agricultural fields is likely to create the problem of
In a sea shore, the benthic animals live in sandy, muddy and rocky substrata and accordingly developed the following adaptations.
$(a)$ Burrowing
$(b)$ Building cubes
$(c)$ Holdfasts / peduncle
Find the suitable substratum against each adaptation.
$X$ - In deep-sea hydrothermal vents where average temperature is between $25$ to $30^oC$
$Y$ - Reptiles and Amphibians are eurythermal