Solving ICSE Class 10 Biology Previous Year Question Papers ICSE Class 10 Biology Question Paper 2019 is the best way to boost your preparation for the board exams.

ICSE Class 10 Biology Question Paper 2019 Solved

Time : (One hour and a half)

General Instructions :

  • Answers to this Paper must be written on the paper provided separately.
  • You will not be allowed to write during the first 15 minutes.
  • This time is to be spent in reading the Question Paper,
  • The time given at the head of this Paper is the time allowed for writing the answers.
  • Attempt all questions from Section I and any four questions from Section II.
  • The intended marks for questions or parts of questions are given in brackets [ ].

Section – I (40 Marks)
(Attempt all questions from this Section)

Question 1.
(a) Name the following :
(i) The layer of the eyeball that provides nourishment to the eye.
(ii) One gaseous compound which depletes the ozone layer.
(iii) The structure which connects the placenta and the foetus.
(iv) A pair of corresponding chromosomes of the same shape and size and derived one from each parent.
(v) The compound formed when haemoglobin combines with carbon dioxide in blood.
Answer:
(i) Choroid
(iii) CFC’s (chlorofluorocarbon)
(iii) Umbilical cord
(iv) Homologous chromosomes
(v) Carboxy-hemoglobin

(b) Correct and rewrite the statements by changing the biological term that is underlined for each statement: [5]
(i) The theory of Inheritance of Acquired Characters was proposed by Watson and Crick.
(ii) The protective sac which develops around the developing embryo is called the Pericardium.
(iii) Maintaining balance of the body and coordinating muscular activities is carried out by the cerebrum.
(iv) The kidney is composed of number of neurons.
(v) The part of the eye which can be donated from a clinically dead person is the Retina.
Answer:
(i) The theory of inheritance of acquired character was proposed by Jean Baptist de Lamarck.
(ii) The protective sac which develops around developing embryo is called Amniotic sac.
(iii) Maintaining balance of body and coordinating muscular activities is carried out by cerebellum.
(iv) The kidney is composed of number of nephrons.
(v) The part of eye which can be donated from clinically dead person is cornea.

ICSE 2019 Biology Question Paper Solved for Class 10

(c) Give suitable biological reasons for the following statements: [5]
(i) The birth rate in India is very high.
(ii) Carbon monoxide is dangerous when inhaled.
(iii) Root hairs become flaccid and droop when excess fertilizers are added to the moist soil around them.
(iv) Acid rain is harmful to the environment.
(v) All life on Earth is supported by Photosynthesis.
Answer:
(i) The birth rate in India is very high due to problems like illiteracy and desire for male child.
(ii) Carbon monoxide when inhaled react with haemoglobin and form a stable comound carboxy-hemoglobin due to which deficiency of oxygen takes place.

(iii) When excess fertilizers are added to moist soil around then root hairs become flaccid as concentration of fertilizers in soil become greater and water from root hairs come out of it and become flaccid.

(iv) Acid rain is harmful to the environment as it contains many impurities and causes damage to the monuments like Taj Mahal.

(v) Photosynthesis is performed by plants by converting the light energy into their food to yield certain essential processes. And release of oxygen is one of the products of photosynthesis in plants which is the gas inhaled by all the living species on earth for respiration. Therefore all life is supported by photosynthesis.

(d) Match the items given in Column A with the most appropriate ones in Column B and REWRITE the correct matching pairs: [5]
ICSE 2019 Biology Question Paper Solved for Class 10 1
Answer:
Cranial nerves – 12 pairs
Leydig cells – Testosterone
Acetylcholine – Neurotransmitter
Spinal nerve – 31 pairs
Sneezing – Natural reflex

ICSE 2019 Biology Question Paper Solved for Class 10

(e) Choose the correct answer from the four options given below: [5]
(i) While recording the pulse rate, where exactly does a doctor press on our wrist?
(A) Nerve
(B) Vein
(C) Artery
(D) Capillary
Answer:
(C) Artery

(ii) In a human male, a sperm will contain:
(A) Both X and Y chromosomes
(B) Only Y chromosome
(C) Only X chromosome A muscular
(D) Either X or Y chromosome
Answer:
(D) Either X or Y chromosome

(iii) A muscular wall is absent in:
(A) Capillary
(B) Venule
(C) Arteriole
(D) Vein
Answer:
(A) Capillary

ICSE 2019 Biology Question Paper Solved for Class 10

(iv) On which day of the menstrual cycle does ovulation take place?
(A) 5th day
(B) 28th day
(C) 14th day
(D) 1th day
Answer:
(C) 14th day

(v) Which one of the following does not affect the rate of transpiration?
(A) Light
(B) Humidity
(C) Wind
(D) Age of the plant
Answer:
(D) Age of the plant

(f) Identify the ODD term in each set and name the CATEGORY to which the remaining three belong: [5]
Example : glucose, starch, cellulose, calcium
Odd term : calcium
Category: others are different types of carbohydrates.
(i) Addison’s disease, Cushing’s Syndrome, Acromegaly, Leukemia.
(ii) Insulin, Adrenaline, Pepsin, Thyroxine.
(iii) Axon, Dendron, Photon, Cyton.
(iv) Chicken pox, Colour blindness, Haemophilia, Albinism.
(v) Polythene bag, Crop residue, Animal waste, Decaying vegetable.
Answer:
(i) Lukemia
Category – All other are diseases due to pituitary gland.

(ii) Pepsin
Cateogy – Other are hormones of endocrine glands.

(iii) Photon
Category – Other are parts of Neutron.

(iii) Chicken pox
Category – Other are diseases related to genes.

(iv) Polythene bag
Category – Others are biodegradable wastes.

ICSE 2019 Biology Question Paper Solved for Class 10

(g) Expand the following biological abbreviations : [5]
(i) ABA
(ii) IAA
(iii) ATP
(iv) DNA
(v) TSH
Answer:
(i) ABA → AbscisicAcid
(ii) IAA → Indole 3 Acetic Acid
(iii) ATP→ Adenosine triphosphate
(iv) DNA → Deoxyribose nucleic acid
(v) TSH → Thyroid stimulating hormone

(h) Study the picture given below and answer the following questions: [5]
ICSE 2019 Biology Question Paper Solved for Class 10 2
(i) Identity the type of pollution.
(ii) Name one pollutant that causes the above pollution.
(iii) Mention the impact of this pollution on human health.
(iv) State one measure to control this pollution.
(v) What is a ‘Pollutant’? Explain the term.
Answer:
(i) Water pollution
(ii) Industrial waste
(iii) It can cause water diseases like cholera, Diarrhoea
(iv) We should not throw waste in water
(v) Pollutant is any undesirable thing or matter which causes pollution.

ICSE 2019 Biology Question Paper Solved for Class 10

Section – II (40 Marks)
Attempt any four questions from this Section.

Question 2.
(a) Given below is an experimental setup to demonstrate a particular tropic movement in germinating seeds. Study the diagram and answer the questions that follow: [5]
ICSE 2019 Biology Question Paper Solved for Class 10 3
(i) Label the parts 1 and 2.
(ii) Name the tropic movement shown by part 1.
(iii) Part 1 is affected by two stimuli. Name them. Which one of the two is stronger?
(iv) What is Thigmotropism? Give one example.
(v) What is meant by ‘Positive’ and ‘Negative’ tropic movements in plants?
Answer:
(i)

  1. Radicals
  2. Plumule

(ii) Hydrotropism
(iii) Geotropism and hydrotropism are two stimuli and geotropism is stronger.

(iv) The growth movement of plants in response to touch stimulus is called thigmotropism for e.g. cuscutta and vinus have tendrils which coil around other plants in response to one sided contact or touch.

(v) Positive tropic movements in piants means a movement of plant which is in same direction as direction of stimulus.

ICSE 2019 Biology Question Paper Solved for Class 10

(b) Mention the exact location of the following: [5]
(i) Testis
(ii) Incus
(iii) Thylakoids
(iv) Amniotic fluid
(v) Corpus cal losum
Answer :
(i) Testis → In scrotum.
(ii) Incus → Between malleus and stapes in middle ear.
(iii) Thylakoids → In chloroplast arranged in piles.
(iv) Amniotic fluid → In Amniotic sac or Amnion
(v) Corpus callosum → between two cerebral hemispheres

Question 3.
(a) The diagram given below represents an experiment to prove the importance of a factor in photosynthesis. Answer the questions that follow: [5]
ICSE 2019 Biology Question Paper Solved for Class 10 4
(i) Name the factor studied in this experiment.
(ii) What will you observe in the experimental leaf after the starch test?
(iii) Explain the process of Photosynthesis.
(iv) Give balanced chemical equation to represent the process of photosynthesis.
(v) Draw a neat, labelled diagram of an experimental setup to show that oxygen is released during photosynthesis.
Answer:
(i) To show that sunlight is necessary for photosynthesis.

(ii) When we put iodine solution to test starch presence on leaf we observed that the part of leaf covered by black paper will turn brown and other part of leaf will turn blue black.

(iii) Photosynthesis is a process of green plants which are able to make food from carbon dioxide and water in presence of chlorophyll and light energy this process by which food is made is called photosynthesis.

(iv) 6CO2 + 12H2O ICSE 2019 Biology Question Paper Solved for Class 10 5 C6H12O6 + 6O2 + 6H2O

(v)
ICSE 2019 Biology Question Paper Solved for Class 10 6
Ail experimental setup to show that oxygen is released (luring photosynthesis.

ICSE 2019 Biology Question Paper Solved for Class 10

(b) State the main functions of the following: [5]
(i) Medulla Oblongata
(ii) Cytokinins
(iii) Tears
(iv) Coronary Artery
(v) Seminal Vesicles
Answer:
(i) Medulla oblongata → controls muscular activities.
(ii) Cytokinins → for cell division and growth and development.
(iii) Tears → kills germs and lubricate eyes.
(iv) Coronary artery → supply blood to heart muscles.
(v) Seminal vesicles → helps in making semen which provide nourishment to sperm.

Question 4.
(a) The diagram given below represents an organ system in the human body. Study the same and answer the questions that follow; [5]
ICSE 2019 Biology Question Paper Solved for Class 10 7
(i) Identify the system.
(ii) Label the parts marked 2 and 4. Mention the function of part 5.
(iii) Name the structural and functional units of the part marked 1.
(iv) What is the fluid that accumulates in part 3?
Which is the main nitrogenous waste present in it?
(v) Draw a neat, labelled diagram showing the longitudinal section of part 1.
Answer:
(i) Urinary or excretory system

(ii) 2-ureter 4-sphincter
function of part 5 → helps in urination

(iii) Nephron

(iv) Urine – fluid
Urea → nitrogenous waste

(v)
ICSE 2019 Biology Question Paper Solved for Class 10 9

ICSE 2019 Biology Question Paper Solved for Class 10

(b) The diagram given below represents an endocrine gland in the human body. Study the diagram and answer the following questions : [5]
ICSE 2019 Biology Question Paper Solved for Class 10 8
(i) Identify the endocrine gland. Where is it located?
(ii) Why is the above gland referred to as the ‘Master gland’?
(iii) Name the hormone which in deficiency causes Diabetes Insipidus. How does this disorder differ from Diabetes Mellitus?
(iv) Explain the term‘Hormone’.
What is the role of Tropic hormones in the human body?
(v) Which lobe of the above gland secretes :

  1. Oxytocin
  2. ACTH
  3. Growth hormone

Answer:
(i) Pituitary gland
Location → base of mid-brain below hypothalamus.

(ii) As it seems to control practically all other endocrine glands so it is called master gland.

(iiii) Vasopressin
Diabetes mellitus is caused due to insufficient secretion of insulin and diabetis insipidus is called due to insufficient secretion of vasopression.

(iv) Hormones is secreation from gland to co-ordinate body functions.
Tropic hormoness which stimulate other endocrine glands to produce their specific hormones.

(v) Oxytocin → posterior pituitary
ACTH → Anterior pituitary
Growth hormone → Anterior pituitary

ICSE 2019 Biology Question Paper Solved for Class 10

Question 5.
(a) Given below is an apparatus which was setup to investigate a physiological process in plants. The setup was placed in bright sunlight. Answer the questions that follow : [5]
ICSE 2019 Biology Question Paper Solved for Class 10 10
(i) Name the process being studied. Define the process.
(ii) Why was the pot enclosed in a rubber sheet?
(iii) Mention two external factors which can accelerate the above process.
(iv) List two adaptations in plants to reduce the above process.
(v) Draw a neat, labelled diagram of a stomatal apparatus.
Answer:
(i) Transpiration
Transpiration means loss of water in form of vapours from plants.

(ii) Rubber sheet will prevent escape of water vapour from pot.
(iii) (I) sunlight (II) temperature (HI) velocity of wind
(iv) (I) sunken stomata (II) Narrow leaves (III) Loss of leaves
(v)
ICSE 2019 Biology Question Paper Solved for Class 10 12

ICSE 2019 Biology Question Paper Solved for Class 10

(b) Given below are two stages in the evolution of man. Study them and answer the questions that follow: [5]
ICSE 2019 Biology Question Paper Solved for Class 10 11
(i) Identify Australopithecus and Neanderthal man from the above pictures.
(ii) Mention two characteristic features each for the two stages.
(iii) Who proposed the theory of ‘Natural Selection’?
(iv) Name the organism used as an example to explain ‘Industrial Melanism’.
(v) Give two examples of Vestigial organs in humans.
Answer:
(i) B-Australopithicus
A-Neanderthal man

(ii) Australopithecus

  1. Teeth were strikingly mankind because of dental arch was a smoothy rounded parabola.
  2. They were small statured.

Neanderthal man

  1. They have large head and prominent brow ridges.
  2. They have height of about 160 cm.

(iii) Charles Darwin
(iv) Peppered Moth, Biston Betularia
(v)

  1. Wisdom teeth
  2. Pinna
  3. Vermiform Appendix

ICSE 2019 Biology Question Paper Solved for Class 10

Question 6.
(a) In Mendel’s experiments, tall pea plants (T) are dominant over dwarf pea ‘plants (t). [5]
(i) What is the phenotype and genotype of the Fj generation if a homozygous tall • plant is crossed with a homozygous dwarf plant?
(ii) Draw a Punnett square board to show the gametes and offspring when both the parents are heterozygous for tallness.
(iii) What is the phenotypic ratio and genotypic ratio of the above cross in (ii)?
(iv) State Mendel’s Law of Dominance.
(v) What is a Dihybrid Cross?
Answer:
(i)
ICSE 2019 Biology Question Paper Solved for Class 10 14
All are heterozygous tall plant.

(ii)
ICSE 2019 Biology Question Paper Solved for Class 10 15

(iii) phenotypic → 3 : 1
genotypic → 1 : 2 : 1

(iv) Law of dominance → Out of a pair of contrasting chromosomes present together only one is able to express itself while other is suppressed and which express itself is dominant and other is recessive.

(v) Dihybrid cross means cross in which 2 characters of plant are given.

ICSE 2019 Biology Question Paper Solved for Class 10

(b) Given below is a diagram representing a stage during the mitotic cell division. [5]
Study the diagram and answer the following questions:
ICSE 2019 Biology Question Paper Solved for Class 10 13
(i) Identify the stage by giving a suitable reason.
(ii) Is it a plant or an animal cell? Give a reason to support your answer.
(iii) Draw a neat, labelled diagram of the stage which follows the one shown in the diagram.
(iv) How many chromosomes will each daughter cell have after the completion of the above division?
(v) Name the four nitrogenous bases.
Answer:
(i) Early anaphase
(ii) Animal cell as no cell wall is present
(iii) Late anaphase
ICSE 2019 Biology Question Paper Solved for Class 10 16
(iv) 46 chromosomes
(v) Adenine Cytosine Guanine Thyamine

ICSE 2019 Biology Question Paper Solved for Class 10

Question 7.
(a) Answer the following questions briefly: [5]
(i) How are the cytons and axons placed in the brain and the spinal cord?
(ii) Which part of the human ear gives ‘Dynamic balance’ and ‘Static balance’ to the body?
(iii) Explain how the human eye adapts itself to bright light and dim light.
(iv) What is Parthenocarpy? Give one example.
(v) Mention any two objectives of ‘Swachh Bharat Abhiyan’.
Answer:
(i) Brain
Cyton – outside
Axon – inner side
Spinal cord
Cyton – inner side
Axon – outside

(ii) dynamic – semicircular canal static – sacculus
(iii) dim light – pupil dilate bright light – pupil constriet
(iv) Ripening of fruits without germination is process called parthenocarpy. e.g. – bannana

(v) Objectives

  1. to clean streets, roads of country’s cities
  2. to establish an accountable mechanism of monitoring latrine use.

(b) The diagram given below represents a system in the human body. Study the diagram and answer the following questions: [5]
ICSE 2019 Biology Question Paper Solved for Class 10 17
(i) Identify the system.
(ii) Label the parts marked 5 and 6.
(iii) Name the two hormones secreted by 1.
(iv) Mention the number and the name of the part involved in fertilization and implantation from the above diagram.
(v) Mention the surgical methods of contraception in :

  1. Human males.
  2. Human females.

Answer:
(i) Female reproductive system

(ii) 5 – oviduct’s funnel
6 – cervix

ICSE 2019 Biology Question Paper Solved for Class 10

(iii)

  1. oestrogen
  2. progesterone

(iv) 2 ovaries fertilization → oviduct
implanatation → uterus

(v)

  1. Human males – Vasectomy
  2. Human females – Tubectomy