$A$... regulators are able to maintain homeostasis by means which ensures constant body temperature, constant osmotic concentration, etc. All ...$B$... and ...$C$.... and is very few lower vertebrate and invertebrate species are indeed capable of such regulation (thermoregulation and osmoregulation)

Evolutionary biologists believe that the 'success' of mammals is largely due to their ability to maintain a constant body ...$D$... and thrive whether they live in Antarctica or in the Sahara desert
Choose the correct option for $A , B , C$ and $D$

Why are coral reefs not found in the regions from west Bengal to Andhra Pradesh but are found in Tamil Nadu and on the east coast of India ?

Differentiation of various tissue and organs in response to light is called

Halophytes are

Niche is defined as the

Give one example for each of the following :

$(i)$ Eurythermal plant species $ .................$  .

$(ii) $ A hot water spring organism $ .................$  .

$(iii)$ An organism seen in deep ocean trenches $ ................$.

$(iv)$ An organism seen in compost pit $ ...............$  .

$(v)$ A parasitic angiosperm $ .................$  .

$(vi)$ A stenothermal plant species $ .................$  .

$(vii)$ Soil organism $ .................$  .

$(viii)$ A benthic animal $ .................$  .

$(ix)$ Antifreeze compound seen in antarctic fish $ .................$  .

$(x)$ An organism which can conform $ .................$  .