The Regulators of Life


01.
Fill in the Blank: ______ is the systematic regulation of various activities.
02.
Fill in the Blank: _______ means orderly execution of the activities
03.
Fill in the Blank: ________, Translocation and Absorption are simultaneous and inter-dependent
processes in a plant
04.
Name the following: Rapid plant movement in plants in response to stimuli and Growth
independent
05.
Growth of roots towards water is _________
(a) Chemotropism
(b) Phototropism
(c) Hydrotropism
(d) Thermotropism
(e) Gravitropism
06.
Fill in the Blank:
The nervous system is divided into:
1. CNS: Central nervous system,
2. PNS: Peripheral nervous system, and
3. ________ nervous system
07.
When a potted plant is kept near window in a room, its stem bends towards the window.
This is _________
(a) Chemotropism
(b) Phototropism
(c) Hydrotropism
(d) Thermotropism
(e) Gravitropism
08.
The plant hormone which inhibits growth leading to wilting of leaves is called _________
(a) Gibberellins
(b) Auxin
(c) Cytokinins
(d) Abscissic acid
09.
Fill in the Blank: A Network of nerves which connects all parts forms the ________
nervous system
10.
Name the following: Movement in Mimosa pudica, drosera plants in response to touch
11.
The plant hormone which promotes cell division is called _________
(a) Gibberellins
(b) Auxin
(c) Cytokinins
(d) Abscissic acid
12.
Fill in the Blank: The _________ nervous system comprises of Brain & spinal cord
which regulates all activities
13.
True or False: Efferent nerves carry impulses from sensory organs to brain
14.
Name the following: Specialized cells capable of creating and transmitting electrochemical
impulses.
15.
Growth of pollen tubes towards the ovules is _________
(a) Chemotropism
(b) Phototropism
(c) Hydrotropism
(d) Thermotropism
(e) Gravitropism
16.
True or False: Neuroglia are supportive cells which assist neurons in their function.
17.
Name the following: Lotus openings at night or Tuberose opens at night in response
to light. Name this movement in plant
18.
Name the following: A 2 to 20 nanometre (nm) gap between end of first axon and dendrites
of next. In this gap, chemicals are released, which are picked by dendrites of next
axon.
19.
The plant hormone which helps in the growth of stem is called _________
(a) Gibberellins
(b) Auxin
(c) Cytokinins
(d) Abscissic acid
20.
Name the following: Slow plant movement in response to stimuli and Growth dependent
21.
Fill in the Blank: The _______ nervous system comprises of all the nerves present
in involuntary organs like heart, stomach, lungs, etc
22.
Fill in the Blank: Any sudden action in response to some happening in the environment,
is called as ___________
23.
Fill in the Blank: Nerves from all over the body meeting in a bundle is commonly
called _______________.
24.
The plant hormone which helps the cells to grow longer is called _________
(a) Gibberellins
(b) Auxin
(c) Cytokinins
(d) Abscissic acid
25.
Name the following: Bony structure which protects the brain. Also called Skull.
26.
Name the following: Protective membranes present between soft CNS and the bone
27.
True or False: Efferent nerves carry impulses from brain to sensory organs
28.
Fill in the Blank: The ventricles, central canal and the space between meninges
are filled with __________ fluid
29.
Curling of leaves in winter is _________
(a) Chemotropism
(b) Phototropism
(c) Hydrotropism
(d) Thermotropism
(e) Gravitropism
30.
Name the following: The maintenance of steady-state by different systems of an organism
for its optimal functioning because of a perfect co-ordination.
Answers:
01. Control
02. Co-ordination
03. Transpiration
04. Nastic movements
05. (c) Hydrotropism
06. ANS: Autonomic
07. (b) Phototropism
08. (d) Abscissic acid
09. PNS: Peripheral
10. Seismonastic movements
11. (c) Cytokinins
12. CNS: Central
13. False { Those are Afferent nerves }
14. Neurons
15. (a) Chemotropism
16. True
17. Photonastic movements
18. Synapse
19. (a) Gibberellins
20. Tropic movements
21. ANS: Autonomic
22. Reflex Action.
23. Spinal Cord
24. (b) Auxin
25. Cranium
26. Meninges
27. True
28. (CSF) Cerebrospinal
29. (d) Thermotropism
30. Homoeostasis

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