In autumn, the change in leaf color is observed only in:

Select the correct option regarding adaptation.

Consider the following four statements regarding certain desert animals like the kangaroo rat:
$(a)$ They have a dark color,a high rate of reproduction,and excrete solid urine.
$(b)$ They do not drink water,breathe slowly to conserve water,and their body is covered by thick hair.
$(c)$ They use dry seeds as food and do not require drinking water.
$(d)$ They excrete very concentrated urine and do not use water to regulate body temperature.
Which two of the above statements are true for such animals?

Animals living in colder regions have shorter tails and ears compared to animals living in warmer regions. This phenomenon is called:

Which of the following areas are used as habitats by organisms?
$I -$ Scorching deserts
$II -$ Rain-soaked rainforests
$III -$ Rushing streams
$IV -$ Deep ocean trenches
$V -$ Polar regions
$VI -$ High mountain tops
$VII -$ Thermal springs
$VIII -$ Stinking compost pits
$IX -$ Our intestine

Thick cuticle,sunken and scotoactive stomata,$CAM$ photosynthesis,and conversion of leaves into spines are some of the important characters of