Which organism does not drink water but uses water produced as a byproduct of its internal metabolic processes?

In lower organisms,the formation of thick-walled spores helps them to survive in unfavorable conditions. What is this process called?

$A$ community is defined as

In colloquial language,habitat is a postal address while niche is the . . . . . . of the organism.

Two or more species occupying identical or overlapping areas are known as

$I.$ 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.