Biology, asked by rajas1111, 10 months ago

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

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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

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Auxin

Gibberellin

Abscisic acid

Cytokinin

The stimulus in the process of thigmotropism is

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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?

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Adrenaline

Auxin

Thyroxine

Insulin

Which of the following controls the involuntary actions in the body?

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Forebrain

Medulla

Spinal cord

Pons

Which of the following control and regulate the life process?

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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

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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

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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

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Insulin

Glucagon

Insulin and glucagon

Gastrin

Transmission across a synapse is carried out by

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Chemicals

Jumping of impulse

Ionisation of fluid in the synaptic cleft

All the above

Junction between two neurons is called

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Cell junction

Neuromuscular junction

Neural joint

Synapse

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Answers

Answered by safnahakkim
3

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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