ICSE Class 10 Biology Question Paper Solution 2015

Students who want to overcome the problem of time management during the biology board exam must solve the previous years of Biology question papers. By doing so, they could able to finish the paper in the allocated time duration of 2 hours. Also, they will get to know the important topics from where questions are expected to be asked in the upcoming Biology exam. This information will help them to prepare efficiently and strategically. Here we have provided the Biology 2015 Question Paper along with the ICSE Class 10 Biology Question Paper 2015 Solution PDF. The solution pdf will give more clarity to students on how to express the answers in the exam for scoring high marks.

The ICSE Class 10 Biology 2015 exam was started at 11 am and students were allotted 2 hours of time duration to finish the paper. Download the ICSE Class 10 Biology Question Paper Solution 2015 PDF for future reference during studies.

Students can have a look at the ICSE Class 10 Biology Question Paper Solution 2015 below:

Topics Found Confusing and Difficult in Biology 2015 Question Paper

Have a look at the list of the difficult and confusing questions asked in 2015 Biology paper 3.

• Male reproductive system, accessory glands.
• Structure of human heart, location and functions of associated structures.
• Mendel’s Laws, Monohybrid ratios of F1 and F2 generation.
• Activities of WHO and Red Cross.
• Interdependence of Photosynthesis and Respiration.
• Ear – parts and functions.
• Location of structures and organs in plants and animals.
• Definitions of Mutation, Photosynthesis, Pulse, Natality, Turgor Pressure
• Disorders due to Hypo and Hyper secretion of hormones.
• Identifying stages of Mitosis, Number of chromosomes in Somatic cells and gametes.
• Vaccines and the diseases prevented.
• Green House Effect and the gases that cause it.
• Acid rain and its effect on the environment.
• Sulfa drugs and their action.
• Biodegradable and Non-biodegradable wastes
• Drawing and labelling Malpighian capsule.

ICSE Class 10 Biology (Paper 3) Question Paper 2015 With Solution

Question 1:

(a) Name the following:

(i) The process of uptake of mineral ions against the concentration gradient using energy from cell.

(ii) The form in which glucose is stored in liver.

(iii) The vein that carries oxygenated blood.

(iv) The cross between two parents having one pair of contrasting characters.

(v) The structure formed by the villi of the embryo and the uterus of the mother.

(b) The statements given below are False. Rewrite the correct form of the statement by changing the word which is underlined:

(i) Alpha cells of pancreas secrete Insulin.

(ii) Formalin is an example of an Antiseptic.

(iii) CNG is mainly responsible for the formation of acid rain.

(iv) Sulphadiazine is an example of an Antiseptic.

(v) Cretinism is caused due to deficiency of Adrenaline.

(c) Choose the correct answer from the four options given below:

(i) A single highly coiled tube where sperms are stored, gets concentrated and mature is known as:

1. Epididymis
2. Vas efferentia
3. Vas deferens
4. Seminiferous tubule.

(ii) Chromosomes get aligned at the center of the cell during :

1. Metaphase
2. Anaphase
3. Prophase
4. Telophase.

(iii) BCG vaccine is effective against:

1. Cholera
2. Mumps
3. Tuberculosis
4. Measles

(iv) Which one of the following is mainly associated with the maintenance of the posture?

1. Cerebrum
2. Cerebellum
3. Thalamus
4. Pons.

(v) An example of non-biodegradable waste is:

1. Vegetable peels
2. Sewage
3. Livestock waste
4. DDT

(d) Mention the exact location of the following structures:

(i) Thylakoids

(ii) Organ of Corti

(iii) Lenticels

(iv) Bicuspid valve

(v) Loop of Henle.

(e) The diagram given below represents a certain stage of mitosis:

(i) Identify the stage of cell division.

(ii) Name the parts labelled A and B.

(iii) What is the unique feature observed in this stage?

(iv) How many daughter cells are formed from this type of cell division?

(f) Given below is an example of a certain structure and its special functional activity. On a similar pattern fill in the blanks with suitable functions:

Example: Chloroplast and Photosynthesis:

(i) Xylem and ________________.

(ii) Ciliary Body and ________________________.

(iii) Seminiferous Tubule and __________________.

(iv) Thyroid gland and ________________________.

(v) Eustachian Tube and ___________________.

(g) Rewrite and complete the following sentences by inserting the correct word in the space indicated:

(i) The phenomenon of loss of water through a cut stem or injured part of plant is called _______.

(ii) ________ is the scientific name of garden pea, which Mendel used for his experiments.

(iii) A fluid that occupies the larger cavity of the eye ball behind the lens is _________.

(iv) Oxygen combines with haemoglobin present in RBC and forms _________.

(v) _________ causes corrosion of the marble or brick surface.

(h) Match the items in Column ‘A’ with those which are most appropriate in Column ‘B’. Rewrite the matching pairs as shown in the example:

Answer:

(a) (i) Active Transport

(ii) Glycogen

(iii) Pulmonary vein

(iv) Monohybrid cross

(v) Placenta

(b) (i) Alpha cells of pancreas secrete Glucagon.

(ii) Formalin is an example of a Disinfectant.

(iii) SO2/SO3/NO/NO2 is mainly responsible for the formation of acid rain.

(iv) Sulphadiazine is an example of a Sulpha drug.

(v) Cretinism is caused due to deficiency of Thyroxin.

(c) (i) A single highly coiled tube where sperms are stored, get concentrated and mature is known as-Epididymis.

(ii) The chromosome get aligned at the centre of the cell during – Metaphase

(iii) BCG vaccine is effective against – Tuberculosis

(iv) Which one of the following is mainly associated with the maintenance of the posture – Cerebellum.

(v) An example of non-biodegradable waste is – DDT.

(d) (i) Present in colourless ground substance/Stroma/Matrix of chloroplast

(ii) In the Cochlea / On the basilar membrane of median canal in Cochlea

(iii) On the surface of old woody stems.

(iv) Between left auricle and left ventricle

(v) In Renal Medulla of kidneys / Part of Nephron

(e) (i) Anaphase

(ii) A – Spindle fibre; B – Centromere

(iii) Chromosomes are seen moving towards the poles.

(iv) Two daughter cells.

(f) (i) Xylem and Helps in the conduction of water and minerals.

(ii) Ciliary Body and Alters the focal length of lens.

(iii) Seminiferous Tubule and Production of sperms.

(iv) Thyroid gland and secretion of Thyroxin for regulation of nasal metabolism/ growth/body temperature / ossification of bones /mental development

(v) Eustachian Tube and Equalizes air pressure on either side of ear drum.

(g)(i) The phenomenon of loss of water through a cut stem or injured part of plant is called Bleeding.

(ii) Pisum Sativum is the scientific name of the garden pea

(iii) A fluid that occupies the larger cavity of the eye ball behind the lens is Vitreous humour.

(iv) Oxygen combines with haemoglobin present in RBC and forms Oxyhaemoglobin.

(v) Acid rain causes corrosion of the marble or brick surface.

(h)(i) Allele – Alternate forms of genes.

Leydig cells – Testosterone.

Utriculus – Static equilibrium.

Snake bite – tourniquet.

Euro IV norms – Control of automobile exhaust.

Question 2:

(a) The diagram below shows two test-tubes A and B. Test-tube A contains a green water plant. Test-tube B contains both a green water plant and a snail. Both Test- tubes are kept in sunlight. Answer the questions that follow:

(i) Name the physiological process that releases the bubbles of oxygen.

(ii) Explain the physiological process as mentioned above in Q.2(a)(i).

(iii) What is the purpose of keeping a snail in test-tube ‘B’?

(iv) Why does test-tube ‘B’ have more bubbles of oxygen?

(v) Give an example of a water plant that can be used in the above experiment.

(vi) Write the overall chemical equation for the above process.

(b) Give the biological /technical terms for the following:

(i) A mixture of smoke and fog.

(ii) Capacity of our body to resist diseases.

(iii) Fixing of developing zygote on the uterine wall.

(iv) The permanent stoppage of menstruation at about the age of 45 years in a female.

(v) The hormone increasing reabsorption of water by kidney tubules.

(vi) A thin membrane covering the entire front part of the eye.

(vii) The lens of eye losing flexibility resulting in a kind of long-sightedness in middle aged people.

(viii) The number of persons living per square kilometre at any given time.

(ix) The sound produced when the atrio-ventricular valves close in the heart.

(x) The process by which white blood cells engulf bacteria.

Answer:

(a) (i) Photosynthesis……….(1)

(ii) The process by which plant cells containing chlorophyll prepare food / glucose from Carbon dioxide and water in the presence of Sunlight……(2)

(iii) The Snail respires and gives out carbon dioxide. More Co₂ dissolved in water is available for photosynthesis ………(2)

(iv) The rate of photosynthesis increases as more Co₂ is available from the Snail that is respiring. Hence, more bubbles of oxygen are released ………(2)

(v) Hydrilla / Elodea …….(1)

(vi)

(b) (i) Smog ……(1)

(ii) Immunity….(1)

(iii) Implantation ………(1)

(iv) Menopause…….(1)

(v) ADH / Vasopressin……..(1)

(vi) Conjunctiva ……(1)

(vii) Presbyopia……..(1)

(viii) Population Density ………(1)

(ix) LUBB …….(1)

(x) Phagocytosis………(1)

Question 3:

(a) An apparatus as shown below was set up to investigate a physiological process in plants. The setup was kept in sunlight for two hours. Droplets of water were then seen inside the bell jar. Answer the questions that follow:

(i) Name the process being studied.

(ii) Explain the process named above in Q.3 (a) (i).

(iii) Why was the pot covered with a plastic sheet?

(iv) Suggest a suitable control for this experiment.

(v) Mention two ways in which this process is beneficial to plants.

(vi) List three adaptations in plants to reduce the above mentioned process.

(b) Briefly answer the following questions:

(i) State two reasons for the increase of population in India.

(ii) What is the significance of amniotic fluid?

(iii) What is the function of ear ossicles?

(iv) Mention any two activities of the WHO.

(v) State Mendel’s law of Dominance.

Answer:

(a) (i) Transpiration………….(1)

(ii) It is the loss of water as water vapour from the aerial parts / stems and leaves of the plants…(2)

(iii) To prevent evaporation of water from the soil….(1)

(iv) An empty polythene bag with its mouth tied and kept in sunlight will show no droplets of water inside ……(1)

(v)

• Gives a cooling effect to the plant on hot days
• Suction force is created for ascent of sap
• Distribution of water and mineral salts ( Any two ….(2)

(vi)

• Sunken Stomata
• Stomata covered by hair
• Fewer Stomata
• Narrow leaves
• Rolled or folded leaves
• Leaves absent or modified into spines
• Thick cuticle on leaves (Any three ——-(3)

(b)(i)

• Illiteracy.
• Traditional beliefs.
• Mortality rate.
• Economic reason
• Religious & social custom
• Desire for a male child
• Lack of recreation. (any other relevant answer). Any two…….(2)
• Protects the embryo from mechanical shocks.

(ii)

• Keeps even pressure all around the embryo.
• Allows the foetus, some restricted movement.
• Prevents sticking of the foetus to the amnion. Any two……(2)

(iii) Amplifies sound vibration received by the tympanum & transmit it to inner ear/ Transfers sound vibrations from tympanum to cochlea…………(2)

(iv)

• To collect & supply information about occurrence of diseases of epidemic nature.
• To promote & support projects for research on diseases.
• To supply information on latest developments about the use of vaccines, cancer research, nutritional discoveries, and control of drug addiction.
• To suggest quarantine measures.
• To lay pharmaceutical standards.
• To organise campaigns for the control of epidemic & endemic diseases.
• Any two………(2)

(v) Law of Dominance: In a pair of Contrasting characters, only one is able to express itself while the other remains suppressed…………..(2)

Question 4:

(a) The diagrams given below are cross sections of blood vessels:

(i) Identify the blood vessels A, B and C.

(ii) Name the parts labelled 1 to 3.

(iii) Name the type of blood that flows through A.

(iv) Mention one structural difference between A and B.

(v) In which of the above vessels does exchange of gases actually take place?

(b) Differentiate between the following pairs on the basis of what is mentioned within brackets:

(i) Diffusion and Osmosis (Definition)

(ii) RBC and WBC (Shape)

(iii) Tubectomy and Vasectomy (Part cut and tied)

(iv) Vasopressin and Insulin (Deficiency disorder)

(v) Rods and Cones of Retina (Type of pigment)

Answer:

(a) (i) A- Artery, B- Vein, C–Capillary……(3)

(ii) 1 – Connective tissue/ Tunica externa

2 – Lumen

3 – Muscular tissue/ Tunica media…….(3)

(iii) A – Oxygenated……..(1)

(iv)

(v) Capillary……………………..(1)

(b) (i) Diffusion – It is the free movement of molecules of a substance from the region of their higher concentration to the region of their lower concentration when the two are in a direct contact.

Osmosis – It is the diffusion of water molecules across a semi-permeable membrane from a more dilute solution to less dilute solution. …………..(2)

(ii) RBC – Biconcave disc shape; 7 micron in diameter.

WBC – Irregular amoeboid shape; 8-20 micron in diameter ……….(2)

Tubectomy – Oviducts/Fallopian tubes

(iii) Vasectomy – Sperm ducts/ Vasdeferens …….(2)

Vasopressin – Diabetes insipidus

(iv) Insulin – Diabetes mellitus ……….(2)

(v) Rods – Rhodopsin

Cones – Iodopsin ……….(2)

Question 5:

(a) The diagram given below shows a section of a human kidney. Study the diagram carefully and answer the questions that follow:

(i) Label the parts numbered 1 to 4.

(ii) Why does part ‘2’ have a striped appearance?

(iii) What is the fluid that passes down part ‘4’? Name the main nitrogenous waste present in it.

(iv) Mention the structural and functional units of kidneys.

(v) Name the two major steps in the formation of the fluid mentioned in Q. 5(a) (iii) [5]

(b) Draw neat and labelled diagrams of the following:

(i) Malpighian Capsule.

(ii) A Myelinated Neuron:

Answer:

(a) (i) 1. Cortex 2. Medulla 3. Pelvis 4. Ureter ……(4)

(ii) Due to the presence of Henle’s loops and collecting ducts of nephrons ……..(1)

(iii) Urine. Urea ……(2)

(iv) Nephrons / Uriniferous tubules / Renal tubules / Kidney Tubules ——-(1) tubes — (0)

(v) — Ultrafiltration

—– Selective Reabsorption ———– (2)

(b) (i)

(ii)

Question 6:

(a) The diagram given below shows the male urinogenital system of a human being. Study the diagram and answer the questions that follow:

(i) Label the parts numbered 1 to 8.

(ii) Name the corresponding structure of part (4) in female reproductive system.

(iii) What is the role of part 7?

(b) In a homozygous plant round seeds (R) are dominant over wrinkled seeds (r):

(i) Draw a Punnett square to show the gametes and offspring when both the plants have heterozygous round seeds (Rr).

(ii) Mention the Phenotype and Genotype ratios of the offsprings in F2 generation.

(iii) Name the sex chromosomes in human males and females.

(iv) Briefly explain the term ‘Mutation’

(v) What is the number of chromosomes in the gametes of human beings?

Answer:

(a) (i) 1 – Urinary bladder 2 – Ureter 3 – Prostate gland 4 –Vas deferens/ Sperm duct 5 –Urethra 6 –Testis 7 –Scrotum / Scrotal sac 8 – Epididymus …….(8)

(ii) Oviduct………..(1)

(iii) To protect the testis & to regulate the temperature of the testis ……….(1)

(b) (i)

(ii) Phenotype Ratio : 3 : 1

Genotype Ratio : 1 : 2 : 1 ………….(2)

(iii) Males – XY

Females – XX…………..(2)

(iv) Mutation: Sudden change in one or more genes/number and structure of chromosomes……(1)

(v) 23

Question 7:

(a) The diagram below represents the human heart in one phase of its functions. Study the diagram carefully and answer the questions that follow:

(i) Name the phase.

(ii) Which part of the heart is contracting in this phase? Give a reason to support your answer.

(iii) Name the parts labelled 1 to 4.

(iv) What type of blood flows through ‘2’?

(v) State the function of the part numbered ‘5’.

(vi) Name the membrane that covers the heart.

(b) Explain the following terms:

(i) Greenhouse effect.

(ii) Turgor pressure.

(iii) Selective reabsorption.

(iv) Natality.

(v) Pulse.

Answer:

(a) (i) Ventricular Diastole / Auricular Systole ……..(1)

(ii) Ventricles.

– Tricuspid and Bicuspid valves are closed

– Aortic and Pulmonary Semilunar valves……..(2)

(iii)

1. Pulmonary vein
2. Aorta
3. Bicuspid /Mitral/Left auriculo ventraicular valve
4. Aortic Semilunar valve …………………(4)

(iv) Oxygenated blood ……..(1)

(v) Pulmonary Semilunar valves open during Ventricular systole and close during Ventricular diastole to prevent backflow of blood into ventricles ……… (1)

(vi) Precardium ……………….(1)

(b) (i) Phenomenon by which CO2 & other atmospheric gases like CH₄, N₂O, & CFC_S reflect the outgoing long wave infrared radiation back to earth , thereby warming the earth’s surface…………(2)

(ii) The pressure exerted by the protoplasm on the cell wall………….(2)

(iii) Diffusion and reabsorption of useful molecules from the uriniferous tubule into blood….(2)

(iv) Number of live births per thousand people per year……(2)

(v) Alternate expansion & elastic recoil of the wall of the artery during ventricular systole….(2)

The ICSE Class 10 Biology Question Paper Solution 2015 must have helped students with their exam preparation. The answers in the Solution pdf have provided an in-depth to 2015 questions and the way answers to be written to score high marks in the board exam. Apart from the 2015 paper solution, students can find the answers to other papers of ICSE Class 10 Previous Years Questions by clicking here. Happy Learning and stay tuned to BYJU’S for the latest update on ICSE/CBSE/State Boards/Competitive exams. Also, don’t forget to download the BYJU’S App.