$A$ group of two or more than two plant species is called as

Which of the following are examples of short-term adaptation?
$(1)$ Accumulation of melanin in the skin
$(2)$ Utilization of stored fat by animals during hibernation
$(3)$ Seed dormancy
$(4)$ Phototropism of stems and geotropism of roots

Plants such as $Prosopis$,$Acacia$,and $Capparis$ represent examples of tropical

Match the following adaptations in Column $I$ with the respective organisms in Column $II$.

Column $I$	Column $II$
$i$. Thick cuticle on leaf surface	$a$. Desert lizards
$ii$. Leaves reduced to spines	$b$. Archaebacteria
$iii$. Burrow into sand to escape from heat	$c$. Desert plants
$iv$. Hot springs	$d$. Opuntia

The genus $Quercus$ is a dominant component in:

$A$ treeless biome is