Organisms which can tolerate and thrive in a wide range of temperature are called .......... e.g. .........

Do you agree that regional and local variations exist within each biome? Substantiate your answer with suitable examples.

How many of the following pairs are correct regarding the thermal tolerance of organisms?
$(1)$ Aves - eurythermal
$(2)$ Mammals - stenothermal
$(3)$ Amphibia - stenothermal
$(4)$ Reptile - eurythermal

$I.$ Many xerophytic plants have thick cuticle on leaf epidermis and sunken stomata.
$II.$ Some xerophytic plants have a special photosynthetic pathway $(CAM)$ that enables their stomata to close during the day.
$III.$ $Opuntia$ has spines (modified leaves) and a photosynthetic phylloclade (stem).
$IV.$ All adaptations are genetically fixed in all organisms.
Choose the combination of correct statements.

Provide information about the natural habitats of organisms.

Scorpion, spiders, lizards, and rattlesnakes are inhabitants of: