WBBSE Class 10 Life Science Chapter 1 Control And Coordination In Living Organisms MCQs

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WBBSE Chapter 1 Sensitivity And Response In Plants Multiple Choice Questions

Question 1. The ability of a plant to react to external stimuli is

  1. Movement
  2. Locomotion
  3. Evolution
  4. Irritability

Answer: 4. Irritability

WBBSE Notes For Class 10 Geography And EnvironmentWBBSE Notes For Class 10 History And Environment
WBBSE Solutions For Class 10 Life ScienceWBBSE Class 10 Life Science Multiple Choice Questions
WBBSE Solutions for Class 10 MathsWBBSE Class 10 Maths Multiple Choice Questions
WBBSE Notes For Class 10 Physical Science And Environment

 

Question 2. The instrument with which sir. c. Bose proved the phenomenon of reacting to stimulus is

  1. Seismograph
  2. Crescograph
  3. Lithograph
  4. Sonometer

Answer: 2. Crescograph

Read and Learn More WBBSE Class 10 Life Science Multiple Choice Questions

Question 3. The movement of variation is controlled by

  1. Diffusion
  2. Osmosis
  3. Transpiration
  4. None of these

Answer: 2. Osmosis

Question 4. The following plant is capable of locomotion

  1. Mimosa
  2. Desmodium
  3. Gourd
  4. Volvox

Answer: 4. Volvox

WBBSE Class 10 Life Science Chapter 1 MCQs

Question 5. The movement offers antherozoid to archegonium is called

  1. Photonasty
  2. Chemonasty
  3. Nyctinasty
  4. Sismonasty

Answer: 2. Chemonasty

Question 6. The plant movement that is controlled by auxin is

  1. Tactic
  2. Nastic
  3. Tropic
  4. Movement of variation

Answer: 2. Nastic

Question 7. The movement of Chlamydomonas towards light is called

  1. Phototaxis
  2. Phototropism
  3. Photonastism
  4. Chemotaxis

Answer: 3. Photonastism

Question 8. The tactic movement controlled by an electric current is

  1. Hydrotactic
  2. Thermotactic
  3. Rheotactic
  4. Galvanotactic

Answer: 4. Galvanotactic

Question 9. The movement of plant roots against gravity is known as

  1. Positively geotropic
  2. Aerotropic
  3. Positively hydrotropic
  4. Positively rheotropic

Answer: 2. Aerotropic

WBBSE Class 10 Life Science Chapter 1 MCQs

Question 10. When a plant stem grows opposite to water, it is called

  1. Positively phototropic
  2. Negatively phototropic
  3. Positively geotropic
  4. Negatively geotropic

Answer: 2. Negatively phototropic

WBBSE Class 10 Life Science Chapter 1 Control And Coordination In Living Organisms MCQs

Question 11. The movement of drosera lea felt towards insects is called

  1. Photonasty
  2. Chemonasty
  3. Nyctinasty
  4. Seismonasty

Answer: 2. Chemonasty

Question 12. The plant movement depending on the intensity of the stimulus is

  1. Tactic
  2. Tropic
  3. Nastic
  4. Variation

Answer: 2. Tropic

Question 13. The nastic movement that is controlled by both light and temperature is

  1. Photonasty
  2. Thermonasty
  3. Nyctinasty
  4. Seismonasty

Answer: 3. Nyctinasty

Question 14. The movement of plants involving actual displacement is

  1. Tropism
  2. Taxes
  3. Nastism
  4. Amoeboid movement

Answer: 2. Taxism

Question 15. The movement of curvature whose direction is controlled by the direction of the stimulus is

  1. Tactic
  2. Tropic
  3. Nastic
  4. None of the above

Answer: 2. Tropic

WBBSE Class 10 Life Science Chapter 1 MCQs

WBBSE Class 10 Life Science Chapter 1 MCQs With Answers

Question 16. In comparison to geotropism, which one is a greater force?

  1. Chemotropism
  2. Hydrotropism
  3. Thigmotropism
  4. Phototropism

Answer: 2. Hydrotropism

Question 17. The following organism shows amoeboid movement

  1. Myxamoeba
  2. Fungi
  3. Algae
  4. Myxomycetes

Answer: 2. Fungi

Question 18. The movement that both Chlamys Doonas and Volvox exhibit is

  1. Phototropism
  2. Geotropism
  3. Phototaxis
  4. Chemotaxis

Answer: 3. Phototaxis

Question 19. The movement involved in the opening of the tulip flower is

  1. Nyctinasty
  2. Photonasty
  3. Thigmonasty
  4. Thermonasty

Answer: 4. Thermonasty

Class 10 Life Science Chapter 1 Multiple Choice

Question 20. The following plant movement is due to the growth

  1. Nutation
  2. Hyponasty
  3. Epinasty
  4. All of them

Answer: 4. All of them

Question 21. The closing of leaflets in Cisalpine is

  1. Photonasty
  2. Thermonasty
  3. Nyctinasty
  4. Seismonasty

Answer: 4. Seismonasty

Question 22. The primary root is:

Positively geotropic, Positively hydrotropic, Negatively geotropic, Negatively hydrotropic

  1. 1, 3 Correct
  2. 2, 4 Correct
  3. 1, 2 Correct
  4. 1, 2, 3 Correct

Answer: 3. 1, 2 Correct

Question 23. The opening and closing of a sunflower are also called

  1. Photonasty
  2. Chemonasty
  3. Thermonasty
  4. Seismonasty

Answer: 1. Photonasty

Question 24. The movement of tendrils of the pea is

  1. Nutation
  2. Circumnutation
  3. Phototropism
  4. Thigmotropism

Answer: 2. Circumnutation

Question 25. The movement that occurs in plants due to touch is

  1. Thigmonasty
  2. Thigmotropism
  3. Both
  4. None

Answer: 3. Both

Class 10 Life Science Chapter 1 Multiple Choice

Question 26. The response toward a stimulus is said to be

  1. Negative
  2. Avoidance
  3. Positive
  4. None of these

Answer: 3. Positive

WBBSE Chapter 1 Response And Chemical Coordination In Plant Hormones

Question 27. Who for the first time mentioned plant hormones?

  1. Hugo de Vries
  2. Charles Darwin
  3. Gregor johann mendel
  4. Robert Hooke

Answer: 2. Charles Darwin

Question 28. Which one is the natural auxin?

  1. IAA
  2. 2, 4-D
  3. 2, 4, 5—T
  4. Ga4

Answer: 1. IAA

Question 29. The hormone that helps in the ripening of fruit is

  1. Florigen
  2. Gibberellin
  3. Ethylene
  4. Auxin

Answer: 3. Ethylene

Class 10 Life Science Chapter 1 Important MCQs

Question 30. Which hormone is produced in the leaf but helps in flowering?

  1. Phytochrome
  2. Auxin
  3. Gibberellin
  4. Florigen

Answer: 3. Gibberellin

Question 31. Which hormone is produced in the coleoptile?

  1. Auxin
  2. Gibberellin
  3. Cytokinin
  4. Florigen

Answer: 1. Auxin

Question 32. Which hormone is used as a weedicide?

  1. lAA
  2. 2,4-D
  3. GA
  4. MCPA

Answer: 2. 2,4-D

Question 33. Name the hypothetical hormone that induces flowering.

  1. Auxin
  2. Kinetin
  3. Ethylene
  4. Florigen

Answer: 4. Florigen

Question 34. Name the hormone that helps in the growth of the axillary bud.

  1. Auxin
  2. Gibberellin
  3. Kinetin
  4. Florigen

Answer: 2. Gibberellin

Class 10 Life Science Chapter 1 Important MCQs

Question 35. The hormone that is produced in a maximum amount in the matured seed is

  1. Auxin
  2. Gibberellin
  3. Kinetin
  4. Zeatin

Answer: 2. Gibberellin

Class 10 Life Science Chapter 1 Questions For WBBSE

Question 36. The hormone that is present in coconut milk is

  1. Kinetin
  2. Auxin
  3. Ethylene
  4. None of them

Answer: 1. Kinetin

Question 37. The hormone that helps in the production of seedless fruit is

  1. Auxin
  2. Gibberellin
  3. Kinetin
  4. Ethylene

Answer: 3. Kinetin

Question 38. The following hormone does not contain nitrogen

  1. 2,4-D
  2. Iaa
  3. Ga3
  4. Kinetin

Answer: 3. Ga3

Class 10 Life Science Chapter 1 Important MCQs

Question 39. Substances that originate at the tip of the stem and control growth elsewhere are known as

  1. Enzymes
  2. Hormones
  3. Vitamins
  4. Growth inhibitors

Answer: 2. Hormones

Question 40. The following hormone is terpenoid in nature

  1. Auxin
  2. Gibberellin
  3. Kinetin
  4. Zeatin

Answer: 2. Gibberellin

Question 41. The hormone that is not a growth promoter

  1. Auxin
  2. Gibberellin
  3. Abscisic acid
  4. Kinetin

Answer: 3. Abscisic acid

Question 42. The hormone that helps in removing dwarfism is

  1. Auxin
  2. Gibberellin
  3. Cytokinin
  4. Abscisic acid

Answer: 2. Gibberellin

Question 43. Name the hormone whose precursor is tryptophan.

  1. Auxin
  2. Gibberellin
  3. Cytokinin
  4. Ethylene

Answer: 1. Auxin

Question 44. Name the hormone that induces apical dominance.

  1. Auxin
  2. Gibberellin
  3. Cytokinin
  4. Ethylene

Answer: 1. Auxin

Question 45. The hormone that may act as an anti-auxin

  1. ABA
  2. Ga3
  3. Florigen
  4. Ethylene

Answer: 1. ABA

WBBSE Class 10 Life Science Chapter 1 Quiz

Question 46. Hormone primarily connected with cell division is

  1. Ga
  2. Cytokinin
  3. Naa
  4. IAA

Answer: 2. Cytokinin

Question 47. Name the non-indole auxin.

  1. IAA
  2. IBA
  3. IPA
  4. NAA

Answer: 4. NAA

Question 49. Which hormone is responsible for the Richmond lang effect?

  1. Auxin
  2. Gibberellin
  3. Cytokinin
  4. Ethylene

Answer: 3. Cytokinin

Question 50. Which one of the following is a rejuvenating hormone?

  1. IAA
  2. Ga3
  3. Kinetin
  4. ABA

Answer: 3. Kinetin

Question 51. The hormone that is present in maize seed is

  1. Kinetin
  2. Zeatin
  3. Iaa
  4. Ga3

Answer: 2. Zeatin

Question 52. The following hormone induces the closure of stomata

  1. ABA
  2. IBA
  3. 2,4-D
  4. Zeatin

Answer: 1. ABA

Question 53. Which is employed for the artificial ripening of banana fruit?

  1. Auxin
  2. Cytokinin
  3. Coumarin
  4. Ethylene

Answer: 4. Ethylene

WBBSE Class 10 Life Science Chapter 1 Quiz

Question 54. Apical dominance is caused by

  1. Abscisic acid in lateral bud
  2. Cytokinin in the leaf tip
  3. Gibberellin in lateral bud
  4. Auxin in shoot tip

Answer: 4. Auxin in shoot tip

Life Science MCQs For Class 10 WBBSE

Question 55. Flowering dependent on cold treatment is

  1. Cryotherapy
  2. Cryogenics
  3. Cryoscopy
  4. Vernalization

Answer: 4. Vernalization

Question 56. The translocation/movement of auxin is largely

  1. Centripetal
  2. Basipetal
  3. Acropetal
  4. Both 2 & 3

Answer: 4. Both 2 & 3

Question 57. Gibberellic acids induce flowering in

  1. Short-day plants under long-day conditions
  2. Long-day plants under short-day conditions
  3. Day-neutral plants under dark conditions
  4. Some gymnosperms only

Answer: 2. Long-day plants under short-day conditions

Question 58. Differentiation of shoot is controlled by

  1. High cytokinin: auxin ratio
  2. High auxin: cytokinin ratio
  3. High gibberellin: auxin ratio
  4. High cytokinin: gibberellin ratio

Answer: 1. High cytokinin: auxin ratio

WBBSE Class 10 Life Science Chapter 1 Quiz

Question 59. Pruning helps in making hedges dense because

  1. It releases wound hormone
  2. It induces the differentiation of new shoots from the rootstock
  3. It frees axillary buds from apical dominance
  4. The apical shoot grows faster after pruning

Answer: 3. It frees axillary buds from apical dominance

Question 60. Which one of the following pairs is not correctly matched?

  1. Ga-leaf fall
  2. Cytokinin-cell division
  3. Laa-cell wall elongation
  4. Aba-stomatal closure

Answer: 1. Ga-leaf fall

Question 61. Which of the following is a gaseous hormone?

  1. IBA
  2. NAA
  3. Ethylene
  4. ABA

Answer: 3. Ethylene

Question 62. Which of the following hormones is involved in counteracting apical dominance induced by auxin?

  1. Cytokinin
  2. Ethylene
  3. Abscisic acid
  4. Brassinosteroids

Answer: 1. Cytokinin

WBBSE Chapter 1 Response And Chemical Coordination In Animals Hormones MCQs

Question 63. Chemically hormones are

  1. Lipids
  2. Proteins
  3. Carbohydrates
  4. All of these

Answer: 4. All of these

Question 64. Response and coordination in animals involve the sense organs, nervous system, and chemicals called hormones.

  1. Molecules
  2. Substances
  3. Messengers
  4. Structures

Answer: 3. Messengers

Class 10 Life Science Chapter 1 MCQs With Answers

Question 65. Goosebumps are also called

  1. Cutis anserine
  2. Duckbumps
  3. Coordination
  4. Response

Answer: 1. Cutis anserina

Question 66. Thermo receptors are responsive to change of

  1. Temperature
  2. Humidity
  3. Pressure
  4. None of these

Answer: 1. Temperature

Question 67. An important hormone required for combatting stress is

  1. Insulin
  2. Thyroxin
  3. Vasopressin
  4. Adrenaline

Answer: 4. Adrenaline

Question 68. Hyperthyroidism results in

  1. Virillism
  2. Simple goitre
  3. Exophthalmic goitre
  4. Both (2) & (3)

Answer: 4. Both (2) & (3)

Question 69. The thyroid hormones t3 and i4 are the main regulators of

  1. Stress
  2. Blood pressure
  3. Blood sugar
  4. Bmr

Answer: 4. Bmr

Question 70. Estrogen and testosterone are

  1. Growth hormones
  2. Sex hormones
  3. Emergency hormones
  4. None of the above

Answer: 2. Sex hormones

Question 71. It stimulates the pituitary gland to release the sex hormones.

  1. Testes
  2. Ovary
  3. Hypothalamus
  4. Thyroid

Answer: 3. Hypothalamus

Question 72. Androgens are the hormones released by the

  1. Testis
  2. Pituitary
  3. Adrenal
  4. All of the above are correct

Answer: 1. Testis

Class 10 Life Science Chapter 1 MCQs With Answers

Question 73. Hormones are secreted by

  1. Exocrine glands
  2. Endocrine glands
  3. Heterocrine glands
  4. Both (2) & (3)

Answer: 4. Both (2) & (3)

Question 74. An example of an amine hormone is

  1. Oestrogen
  2. Oxytocin
  3. Epinephrine
  4. Follicle-stimulating hormone

Answer: 3. Epinephrine

Question 75. Examples of steroid hormones are

  1. Thyroxine
  2. Estrogens
  3. Progesterone
  4. Both ‘2’ and ‘3’ are correct

Answer: 4. Both ‘2’ and ‘3’ are correct

Question 76. The chemical structure of a hormone enables it to combine with a receptor in the cells of its

  1. Target
  2. Gland
  3. Organ
  4. All the above are correct

Answer: 1. Target

Question 77. Neurosecretory cells are found in

  1. Liver
  2. Hypothalamus
  3. Kidney
  4. Pancreas

Answer: 2. Hypothalamus

Question 78. Oxytocin and vasopressin are secreted by

  1. Posterior pituitary
  2. Anterior pituitary
  3. Both ‘1’ and ‘2’
  4. Neither

Answer: 1. Posterior pituitary

Class 10 Life Science Chapter 1 MCQs With Answers

Question 79. The hormones t3 and t4 work together to regulate the body’s

  1. Temperature
  2. Balance
  3. Metabolic rate
  4. Growth

Answer: 3. Metabolic rate

Question 80. The hormone epinephrine is produced from

  1. Thymus
  2. Adrenal medulla
  3. Adrenal cortex
  4. Thyroid

Answer: 3. Adrenal cortex

Question 81. The release of puberty triggers the development of female secondary sex characteristics.

  1. Progesterone
  2. Adrenaline
  3. Fsh
  4. Oestrogen

Answer: 4. Oestrogen

Question 82. During this time, the kidneys are unable to prevent the excretion of excess water.

  1. Copd
  2. Diabetes insipidus
  3. Diabetes mellitus
  4. Cretinism

Answer: 2. Diabetes insipidus

WBBSE Class 10 Life Science Chapter 1 MCQs

Question 83. Goitre is due to swelling of

  1. Gall bladder
  2. Pancreas
  3. Testis
  4. Thyroid

Answer: 4. Thyroid

Question 84. Is known as the master gland.

  1. Pituitary
  2. Thyroid
  3. Ovary
  4. Hypothalamus

Answer: 4. Hypothalamus

Question 85. Which one of the following is a local hormone?

  1. Oxytocin
  2. Insulin
  3. Adrenaline
  4. Gastrin

Answer: 4. Gastrin

Multiple Choice Questions On Control And Coordination

Question 86. Which hormone is not tropic?

  1. ADH
  2. STH
  3. FSH
  4. LH

Answer: 1. ADH

Question 87. Diabetes mellitus is associated with

  1. Polyuria
  2. Polydipsia
  3. Polyphagia
  4. All Of These

Answer: 4. All of the these

WBBSE Chapter 1 Response And Physical Coordination In Animals Nervous System MCQs

Question 88. In A Neuron, the Conversion Of Electrical Signal To Chemical Signal Occurs At/In

  1. Axonal End
  2. Dendritic End
  3. Cell Body
  4. Nodes Of Ranvler

Answer: 1. Axonal End

WBBSE Class 10 Life Science Chapter 1 MCQs

Question 89. The Nervous System Is Made Up Of Two Major Types Of Cells Known As

  1. Axon And Dendron
  2. Neuron And Nephron
  3. Neurons And Neuroglia
  4. Nucleus And Cytoplasm

Answer: 3. Neurons And Neuroglia

Question 90. Axons Are

  1. Afferent
  2. Efferent
  3. Both ‘A’ And ‘B’
  4. None

Answer: 2. Efferent

Question 91. Information From One Neuron Flows To Another Neuron Across A

  1. Neuro-Muscular Junction
  2. Neural Joint
  3. Synapse
  4. Ganglia

Answer: 3. Synapse

Question 92. Brain And Spinal Cord Constitute The

  1. CNS
  2. PNS
  3. ANS
  4. BMR

Answer: 1. CNS

Question 93. The Largest Part Of The Brain Is

  1. Cerebellum
  2. Cerebrum
  3. Cerebral Cortex
  4. Medulla

Answer: 2. Cerebrum

Class 10 Life Science Chapter 1 Multiple Choice

Question 94. Conditioned Reflexes Are

  1. Inborn
  2. Abnormal
  3. Simple
  4. Acquired

Answer: 4. Acquired

Question 95. The Thin, Transparent Tissue That Covers The Outer Surface Of The Eye Is

  1. Conjunctiva
  2. Cornea
  3. Retina
  4. Lens

Answer: 1. Conjunctiva

Question 96. The Accommodation Is A Of The Eye.

  1. Part
  2. Reflex Action
  3. Both ‘A’ And ‘B’
  4. None

Answer: 2. Reflex Action

Question 96. Near-sightedness problem Is Also Known As

  1. Hypermetropia
  2. Conjunctivitis
  3. Myopia
  4. Presbyopia

Answer: 3. Myopia

Question 97. A Bipolar Neuron Has

  1. Only One Axon
  2. One Axon & Many Dendrites
  3. One Axon & One Dendron
  4. Neither Any Dendron Nor Any Axon

Answer: 3. One Axon & One Dendron

Question 98. Motor Neurons Transmit Impulses

  1. From Receptors To Cns
  2. Spinal Cord To Brain
  3. From Relay Neuron To Sensory Neuron
  4. Cns To Effector

Answer: 4. Cns To Effector

Question 99. An Example Of Neurotransmitter Is

  1. Lysozyme
  2. Dopamine
  3. Nissl Granules
  4. Csf

Answer: 2. Dopamine

Class 10 Life Science Chapter 1 Multiple Choice

Question 100. The First And Second Lateral Ventricles Of The Brain Are Connected To The Third Ventricle Through The

  1. Central Canal
  2. Foramen Of Monro
  3. Foramen Ovale
  4. Foramen Magnum

Answer: 2. Foramen Of Monro

Question 101. Which Is The Correct Sequence Of The Components Of A Reflex Arc?

  1. Receptors→Muscles→ Sensory Neuron→Motor Neuron→ Spinal Cord
  2. Receptors→ Motor Neuron→ Spinal Cord→ Sensory Neuron→ Muscle
  3. Receptors→ Spinal Cord→ Sensory Neuron→ Motor Neuron→ Muscle
  4. Receptors→ Sensory Neuron→ Spinal Cord→ Motor Neuron→ Muscle

Answer: 4. Receptors→ Sensory Neuron→ Spinal Cord→ Motor Neuron→ Muscle

Objective Type Questions MCQs

Question 102. The part of the human brain associated with controlling body temperature is?

  1. Thalamus
  2. Cerebellum
  3. Hypothalamus
  4. Medulla oblongata

Answer: Hypothalamus.

Question 103. Which one of the following is the correct reflex arc?

  1. Receptor → Effector → Efferent nerve → Nerve centre→ Afferent nerve
  2. Nerve centre→ Receptor→ Afferent nerve→ Effector → Efferent nerve
  3. Efferent nerve Receptor→ Afferent nerve→ Nerve centre→ Effector
  4. Receptor → Afferent nerve → Nerve centre→ Efferent nerve→ Effector

Answer: Receptor → Afferent nerve → Nerve centre→ Efferent nerve → Effector

Class 10 Life Science Chapter 1 Important MCQs

Question 104. Determine the number of Cranial nerves in the human body —

  1. 10 pairs
  2. 31 pairs
  3. 12 pairs
  4. 21 pairs

Answer: 12 pairs.

WBBSE Chapter 1 Locomotion As A Type Of Response In Animals MCQs

Question 105. Amoeboid Locomotion Is Performed By

  1. Cilia
  2. Flagella
  3. Muscles
  4. Pseudopodia

Answer: 4. Pseudopodia

Question 106. Biped A I Ism Is Found In

  1. Fishes
  2. Birds
  3. Euglena
  4. Human

Answer: 4. Human

Question 107. Synovial Joints Are

  1. Immovable
  2. Movable
  3. Slightly Movable
  4. Both 2 And 3 Correct

Answer: 2. Movable

Question 108. Examples Of Hinge Joints Are

  1. Shoulder
  2. Skull
  3. Knee
  4. Vertebral Joints

Answer: 3. Knee

Question 109. Myotomes Are Found In

  1. Fishes
  2. Paramoecium
  3. Euglena
  4. All Animals

Answer: 1. Fishes

Class 10 Life Science Chapter 1 Important MCQs

Question 110. Pseudopodium In Ameoba Is Formed At The Anterior End By The

  1. Conversion Of Plasmagel To Plasmasol
  2. Flow Of Plasmasol At The Thinnest Point Of Cytoplasm
  3. Conversion Of Plasmasol To Gel
  4. None Of These

Answer: 3. Conversion Of Plasmasol To Gel

Question 111. Tail Feathers And Wing Feathers Of Birds Are Known As

  1. Filoplumes And Contours
  2. Rectrices And Remiges
  3. Remiges And Rectrices
  4. Contours And Rectrices

Answer: 2. Rectrices And Remiges

Question 112. Abductors Are Antagonists Of

  1. Adductors
  2. Extensors
  3. Flexors
  4. None Of These

Answer: 1. Adductors

Question 113. When A Joint Is Such That It Allows the Movement Of Bones In All Directions, It Is Known As A

  1. Hinge Joint
  2. Angular Joint
  3. Pivot Joint
  4. Ball And Socket Joint

Answer: 4. Ball And Socket Joint

Question 114. Elbow Joint Is

  1. Pivot Joint
  2. Hinge Joint
  3. Gliding Joint
  4. None Of These

Answer: 2. Hinge Joint

Question 115. Synovial Fluid Is Secreted By

  1. Cartilage
  2. Bones
  3. Synovial Membrane
  4. All Of These

Answer: 3. Synovial Membrane

Class 10 Life Science Chapter 1 MCQs With Answers

Question 116. Which one is the largest synovial joint of the human body?

  1. Shoulder joint
  2. Knee joint
  3. Hip joint
  4. Elbow joint

Answer: 3. Hip joint

Question 117. A sessile animal Is

  1. Starfish
  2. Earthworm
  3. Coral
  4. Snail

Answer: 3. Coral

Question 118. Flight muscles of birds are attached to

  1. Keel of sternum
  2. Clavicle
  3. Pelvic girdle
  4. Humerus

Answer: 1. Keel of sternum

Question 119. Some flowers are open after sunrise and close after sunset. This is

  1. Photonasty
  2. Seismonasty
  3. Chemonasty
  4. Thermonasty

Answer: 1. Photonasty

Question 120. The tentacles on the leaves of an insectivorous plant called sundew bend to trap the insect as soon as they come in contact with the insect’s body. This is

  1. Seismonasty
  2. Thermonasty
  3. Photonasty
  4. Chemonasty

Answer: 4. Chemonasty

Question 121. Select which of the following statements is correctly related to tropic movement-

  1. It is controlled by the intensity of the stimulus
  2. The overall change of place takes place by a plant or part of a plant
  3. This movement is observed in the algae called volvox
  4. It is an induced movement of curvature controlled by the direction of the stimulus

Answer: 1. It is an induced movement of curvature controlled by the direction of the stimulus

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