If the tip of a sugarcane plant is removed from the field,it still continues to grow in length. This is due to the presence of:

Animals of colder regions and fishes of cold water have a thicker layer of subcutaneous fat. Describe why?

Give reasons for the following:
$(i)$ Bark of a tree is impervious to gases and water.
$(ii)$ In desert plants,epidermis has a thick waxy coating.
$(iii)$ Epidermal cells of the roots generally have hair-like parts.

Which muscles act involuntarily?
$(i)$ Striated muscles
$(ii)$ Smooth muscles
$(iii)$ Cardiac muscles
$(iv)$ Skeletal muscles

Fill in the blanks:
$(a)$ ............. are forms of complex tissue.
$(b)$ .............. have guard cells.
$(c)$ Cells of cork contain a chemical called .............
$(d)$ Husk of coconut is made of ............. tissue.
$(e)$ ............ gives flexibility in plants.
$(f)$ ............... and ............... are both conducting tissues.
$(g)$ Xylem transports ............... and ............... from soil.
$(h)$ Phloem transports ............... from ............... to other parts of the plant.

$A$ long tree has several branches. The tissue that helps in the sideways conduction of water in the branches is