Control & Coordination

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About this quiz :

Series name : Boostup
Class : 10th
Subject : science { Biology}
Syllabus : Control & Coordination
Total questions : 15
Total marks : 15

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

1 point

(a) Medulla in forebrain

(b) Medulla in hindbrain

(d) Medulla in midbrain

Clear selection

The main function of the plant hormone called abscisic acid is to:

1 point

(a) Increase the length of cells

(b) Promote cell division

(d) Promote growth of stem and roots

Clear selection

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

(a) Phototropism

(b) Thigmonasty

(d) Photonasty

Clear selection

The number of pairs of nerves which arises from the spinal cord is:

1 point

(a) 21

(b) 31

(d) 51

Clear selection

Which of the following control and regulate the life process?

1 point

(a) Reproductive and endocrine systems

(b) Respiratory and nervous systems

(d) Nervous and endocrine systems

Clear selection

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

(a) Water and light

(b) Water and minerals

(d) Light and gravity

Clear selection

The stimulus in the process of thigmotropism is:

1 point

(a) Touch

(b) Gravity

(d) Chemical

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The plant hormone which triggers the fall of mature leaves and fruits from the plant body is:

1 point

(a) Auxin

(b) Gibberellin

(d) Cytokinin

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Iodine is necessary for the synthesis of which of the following hormone?

1 point

(a) Adrenaline

(b) Auxin

(d) Insulin

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The movement of a plant part in response to the force of attraction exerted by the earth is called:

1 point

(a) Hydrotropism

(b) Geotropism

(d) Phototropism

Clear selection

A doctor advised a person to take injection of insulin because his:

1 point

(a) Blood pressure was high

(b) Heart beat was high

(d) Thyroxine level in blood was high

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Electrical impulse travels in a neuron from:

1 point

(a) Dendrite → axon → axon end → cell body

(b) Cell body → dendrite → axon → axon end

(d) Axon end →axon → cell body → dendrite

Clear selection

The growth of tendrils in pea plants is due to the:

1 point

(a) Effect of sunlight on the tendril cells facing the sun

(b) Effect of gravity on the part of tendril hanging down towards the earth

(d) Rapid cell division and elongation in tendril cells in contact with the support

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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

(a) Chemotropism

(b) Hydrotropism

(d) Geotropism

Clear selection

The dramatic changes in body features associated with puberty are mainly because of the secretions of:

1 point

(a) Estrogen from testes and testosterone from ovary

(b) Estrogen from adrenal gland and testosterone from pituitary gland

(d) Testosterone from thyroid gland and estrogen from pituitary gland

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