Q. Why does food seem tasteless when you have a cold? Q. Why does food seem tasteless when you have a cold?
A cold temporarily damages our sense of smell and thus, our ability to perceive flavour.
LET’S RECAP! Q. The basic unit of the nervous system is
A. Neuron
B. Nephron
C. Brain cell
D. None of these Q. The basic unit of the nervous system is
A. Neuron
B. Nephron
C. Brain cell
D. None of these Q. Dendrites
A. conduct impulses away from a neuron
B. protect the axon
C. conduct impulses towards a neuron
D. Both A and C Q. Dendrites
A. conduct impulses away from a neuron
B. protect the axon
C. conduct impulses towards a neuron
D. Both A and C Q. The central nervous system is comprised of
A. brain
B. spinal cord and nerves
C. brain and nerves
D. brain and spinal cord Q. The central nervous system is comprised of
A. brain
B. spinal cord and nerves
C. brain and nerves
D. brain and spinal cord Q. The main thinking part of the brain is
A. cerebellum
B. cerebrum
C. pons
D. medulla oblongata Q. The main thinking part of the brain is
A. cerebellum
B. cerebrum
C. pons
D. medulla oblongata
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● Structured Long term batch insync with your curriculum ● All Chapterwise - Micro courses to cover one chapter at a time ○ At least 2 Live classes for each chapter every month ● Complete Crash Course before exams to revise entire syllabus ● Freedom to make your own study plan and curriculum ● Test Series ● Assignments ● Learning Material ● Regular Performance Reports Let’s understand...
Plant movements
Coordination in plants Types of Movements in Plants Movements in plants can be:
I. Direction-dependent (Tropic)
II. Direction-independent (Nastic) Tropic Movements
Plants directionally move in response to stimuli such as sunlight, water, gravity etc. Tropic Movements
Movement of plants in the direction of light is called phototropism. Tropic Movements
Movement of plants in the direction of gravity is called geotropism. Tropic Movements
Movement of plants in the direction of water is called hydrotropism. Tropic Movements
Movement of plants towards a chemical stimulus is called chemotropism. Any doubts?? QUICK CHECK Q. Movement of plants towards gravity is called
A. Phototropism
B. Geotropism
C. Hydrotropism
D. Chemotropism Q. Movement of plants towards gravity is called
A. Phototropism
B. Geotropism
C. Hydrotropism
D. Chemotropism Q. Drooping of touch-me-not leaves is an example of
A. Phototropism
B. Nastic movement
C. Tropic movement
D. Chemotropism Q. Drooping of touch-me-not leaves is an example of
A. Phototropism
B. Nastic movement
C. Tropic movement
D. Chemotropism
Without a nervous system, how do these happen? Internally, growth and development in plants are controlled by hormones. Plant hormones
● Help coordinate growth, development and responses to the environment. ● Synthesised at places away from where they act, and simply diffuse to the area of action.
● The major hormones are auxins, gibberellins, cytokinins, abscisic acid and ethylene. Plant hormones
1. AUXINS
Auxins promote stem elongation. Plant hormones
1. AUXINS Plant hormones
2. GIBBERELLINS
Gibberellins too, promote stem elongation. Plant hormones
3. CYTOKININ
Cytokinins promote cell division and thus, found mostly in areas of rapid cell division. Plant hormones
4. ABSCISIC ACID
Abscisic acid helps in leaf fall/abscission. Plant hormones
5. ETHYLENE
Ethylene helps in fruits ripening. Plant hormones - At a Glance QUICK CHECK Q. Leaf fall is caused by
A. Ethylene
B. Auxin
C. Cytokinin
D. Abscisic acid Q. Leaf fall is caused by
A. Ethylene
B. Auxin
C. Cytokinin
D. Abscisic acid Q. Fruit ripening is promoted by
A. Ethylene
B. Auxin
C. Cytokinin
D. Abscisic acid Q. Fruit ripening is promoted by
A. Ethylene
B. Auxin
C. Cytokinin
D. Abscisic acid Q. The hormone that helps with phototropism is
A. Gibberellin
B. Auxin
C. Cytokinin
D. Ethylene Q. The hormone that helps with phototropism is
A. Gibberellin
B. Auxin
C. Cytokinin
D. Ethylene
You now know...
Plant movements
Coordination in plants Q. How do some plants climb around surfaces? Reach out to me @ [email protected]