Control and Coordination - Class 10 - Science
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Back Questions - Control and Coordination | NCERT | Science | Class 10
Which of the following is a plant hormone?
(a) Insulin
(b) Thyroxin
(c) Oestrogen
(d) Cytokinin.
(d) Cytokinin is a plant hormone. The other options, (a) Insulin, (b) Thyroxin, and (c) Oestrogen, are hormones found in animals. Cytokinins are involved in various aspects of plant growth and development, including cell division and differentiation, and the regulation of other physiological processes.
The gap between two neurons is called a
(a) dendrite.
(b) synapse.
(c) axon.
(d) impulse.
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Sign up nowThe brain is responsible for
(a) thinking.
(b) regulating the heart beat.
(c) balancing the body.
(d) all of the above.
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Sign up nowCompare and contrast nervous and hormonal mechanisms for control and coordination in animals. 120 words. In table
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Sign up nowExtra Questions - Control and Coordination | NCERT | Science | Class 10
Arrange the following activities in the order of decreasing speed in which they take place:
(i) Movement of mimosa when it is touched.
(ii) Movement of sunflower in response to day and night.
(iii) Growth-related movements of plants.
A) (ii) - (iii) - (i)
B) (i) - (ii) - (iii)
C) (iii) - (ii) - (i)
D) (iii) - (i) - (ii)
The correct answer is Option B: (i) - (ii) - (iii)
The movement of the mimosa plant's leaves, which close and droop down swiftly upon being touched, occurs at the fastest rate among the listed activities.
The sunflower's movement in response to the sun's position across day and night takes place at a slower rate compared to the rapid reaction of the mimosa plant.
Finally, growth-related movements in plants generally occur at the slowest pace, as these are gradual changes that take place over longer periods.
In summary, the speed of these movements decreases from the immediate response of mimosa (i), to the day-long tracking of the sun by sunflowers (ii), ending with the gradual growth movements of plants (iii).
Any change in the environment to which an organism responds is called
A) stimulus
B) response C) tropism
D) dominance
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