Fill in the blanks.
i. Leaves of some aquatic plants are …………. and …………. ike a ribbon.
ii. …………. in stems and …………. of aquatic plants are useful for floating in water.
iii. Leaves of desert plants are modified into …………. .
iv. The stems of desert plants are green as they perform …………. in the absence of leaves.
v. …………. roots of grasses prevent soil erosion.