The movement of a plant part in response to the force of attraction exerted by the earth is called
1 point
Hydrotropism
Geotropism
Chemotropism
Phototropism
A big tree falls in a forest, but its roots are still in contact with the soil. The branches of this fallen tree grow straight up (vertically). This happens in response to
1 point
Water and light
Water and minerals
Gravity and water
Light and gravity
The main function of the plant hormone called abscisic acid is to
1 point
Increase the length of cells
Promote cell division
Inhibit growth
Promote growth of stem and roots
The growth of tendrils in pea plants is due to the
1 point
Effect of sunlight on the tendril cells facing the sun
Effect of gravity on the part of tendril hanging down towards the earth
Rapid cell division and elongation in tendril cells that are away from the support
Rapid cell division and elongation in tendril cells in contact with the support
The plant hormone which triggers the fall of mature leaves and fruits from the plant body is
1 point
Auxin
Gibberellin
Abscisic acid
Cytokinin
The stimulus in the process of thigmotropism is
1 point
Touch
Gravity
Light
Chemical
A growing seedling is kept in a dark room. A burning lamp is placed near to it for a few days. The top part of seedling bends towards the burning candle. This is an example of
1 point
Chemotropism
Hydrotropism
Phototropism
Geotropism
Dandelion flowers open the petals in bright light during the daytime but close the petals in dark at night. This response of dandelion flowers to light is called
1 point
Phtotropism
Thigmonasty
Chemotropism
Photonasty
The number of pairs of nerves which arises from the spinal cord is
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21
31
41
51
Iodine is necessary for the synthesis of which of the following hormone?
1 point
Adrenaline
Auxin
Thyroxine
Insulin
Which of the following controls the involuntary actions in the body?
1 point
Forebrain
Medulla
Spinal cord
Pons
Which of the following control and regulate the life process?
1 point
Reproductive and endocrine systems
Respiratory and nervous systems
Endocrine and digestive systems
Nervous and endocrine systems
A doctor advised a person to take injection of insulin because his
1 point
Blood pressure was high
Heart beat was high
Blood sugar was high
Thyroxine level in blood was high
The dramatic changes in body features associated with puberty are mainly because of the secretions of
1 point
Estrogen from testes and testosterone from ovary
Estrogen from adrenal gland and testosterone from pituitary gland
Testosterone from testes and estrogen from ovary
Testosterone from thyroid gland and estrogen from pituitary gland
Electrical impulse travels in a neuron from
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Dendrite → axon → axon end → cell body
Cell body → dendrite → axon → axon end
Dendrite → cell body → axon → axon end
Axon end →axon → cell body → dendrite
Dwarfism results due to
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Excess secretion of thyroxin
Less secretion of adrenaline
Less secretion of growth hormone
Excess secretion of growth hormone
Adrenaline, the emergency hormone, functions in coordination with
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Parasympathetic nervous system
Voluntary nervous system
Sympathetic nervous system
Spinal Cord
Pancreas secretes hormone
1 point
Insulin
Glucagon
Insulin and glucagon
Gastrin
Transmission across a synapse is carried out by
1 point
Chemicals
Jumping of impulse
Ionisation of fluid in the synaptic cleft
All the above
Junction between two neurons is called
1 point
Cell junction
Neuromuscular junction
Neural joint
Synapse
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Answer:1 geotropism
2 water and light ( NOT SURE)
3 inhibit growth
4 option 4
5 auxin (not sure)
6 touch
7 phototropism
8 phototropism
9 31 pairs
10 thyroxine
11 medulla
12 nervous and endocrine systems
13 blood sugar was high
14 option c
15 option c
16 option c
17 option a( not sure)
18 option c
19 all of the above
20 synapse
Explanation: i'm not sure
but still it will help u.......
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