Biology for ( Grade 10 )

the ganglia and nerves spreading form the nerve cord.

Nervous system of Grass hopper

DAILY PRACTIVE PROBLEMS # 9

OBJECTIVE QUESTIONS

1. Phytohormones are
   (A) hormones regulating growth from seed to adulthood
   (B) hormones regulating secondary growth
   (C) growth regulators synthesized by plants and influencing
   physiological processes
   (D) hormones regulating flowering.


2. The natural plant hormones were first isolated from
   (A) cotton fruits, spinach leaves, rice plant(B) avena coleoptiles,
   fungus gibberella
   (C) corn germ oil, human urine (D) human urine, rice plant.


3. If the tip of a seeding is cut off, growth as well as bending ceases
   because it hampers
   (A) perception of light stimulus (B) transpiration