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ICSE Class X Mid-term 2025 : Biology

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Riyal _Shreyak
National Gems Higher Secondary School (NGHSS), Kolkata

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---------------------------=----- ...-i'Y1Deccan ~ International 2024-25 ICSE School High School First Pre Board Subject: Biology Date: 13/12/2024 Maximum Marks: 80 Grade: 10 ICSE Duration: 2 hour Name: Ar.Jousn1<,A K'A1> Rollno.: 1081-103 1. Answer all questions on a separate ruled paper. 2. You will not be allowed to write during the first 15 minutes. 3. This time is to be spent in reading the question paper. 4. The time given at the head of this paper is the time allowed for writing the answers. 5. Attempt all questions from Section A and answer any four from Section B 6. The intended marks for questions or parts of questions are given in brackets. Section A- (40 marks) Question 1 [lSJ a.Choose the correct option from the following statements: /2-he diagram shows the cell of an organism. The nucleus contains 12 chromosomes. After this cell divides by mitosis , how many chromosomes would be present in one of the daughter cells? A. 6 B. 12. C. 18. D. 24 }( Red blood cells were placed in pure water. Movement of water across the cell membrane caused a change in the appearance. What caused this change in the appearance? Direction of water movement From higher to lower water potential From lower to higher water potential A Into cells yes no B Into cells no yes C Out of cells yes no D Out of cells no yes 2024-25 ~I~C~S~E--- --------------~ ~=-=~- . t blood group from him. Th_ey ha ::/A ve two ,.?'' man marr ies n woman who bas a d1fferen h oth er an d dif fer d ent oup blo od s from eac children. The children have different bloo gr ? f the par ents' blo od gro up groups from their parents. Wh at are the genotypes O A aa A. IAIA and 18 18 B. JAlA and D JAJ 8 and IOI0 1 1 C. I I 8 and 1 1 . / The diagram shows a mamm . h rtl aft er fertilization. alian embryo, s 0 Y Which is the correct descripti on of these cells? A.Gametes undergoing meiosis B. Gametes undergoing mitosi s C.Stem cells undergoing meios is D.Stem cells undergoing mitosi s v. Which of the following pai r is correct? A. Transpiration- hydathodes B. Palisade parenchyma - glucos e synthesis C. Xylem- translocation of st3 rch D.Muslin cloth- semipermeable vi. Th e rea cti on- 03 )( ) 0.2;.+ (OJ The pollutant X is - A. Carbon dioxide B. Oxides of Nitrogen C. Me thane D. Chlorofluorocarbo n vii.The pa rt ofs per m which facilitates entry of sperm into the ovum is A.Lysozyme B. Acrosome C. Mitochondri a D.Lysosome viii.Select the incorrect match of trait studied by Mendel and its dominant expressionTrait of pea plant Dominant expression A. Po d colourGreen B. Flo we r colourViolet C. Seed colourGreen D. Seed shapeRound 2 ZJL&? xua t - - - = - V 1111!? ] r::-ne:-a ,,,___ . ' ICSE --:--IX.Given below .1s a sch , 2024-25 ,A ,.. ' ema ti c representation of blood flow from mother to foetus and vice vers a. StudY the same and choose the correct labelling part. a food - - '(<(Ir-------\ HOT'f Pxygen, e( ~-------___..- c~and ctlbe.t,..~ ~ The correc a e ng parts 1sA. I- Umbilical artery 2- Uterine vein 3- Umbilical vein 4- Uterine artery 5-Placenta 6- Umbilical cord B. I- Umbilical artery 2-Umbilical vein 3- Uterine artery 4- Uterine vein 5- Placenta 6- Umbilical cord C. 1- Uterine vein 2- Placenta 3- Umbilical artery 4- Umbilical vein 5- Uterine artery 6- Umbilical cord D. 1- Umbilical vein 2- Uterine artery 3- Uterine vein 4- Umbilical artery 5-Umbilical cord 6- Placenta x. Given below are the events of Photosynthesis. Identify which of the following is/are not true and select the correct option. I .Absorption of light energy by chlorophyll 2.The assimilatory power in the form ofNADPH and ATP are produced during the dark phase. 3. Reduction of carbon dioxide t_o carbohydrates 4. Conversion of chemical energy to radiant energy and splitting of water molecules into hydrogen and oxygen A. B. C. D. 1 and 2 only 2 only 2 and 3 only 2 and 4 only 3 in an eye. . r the pupil O th xi.The diagram shows the muscle that regulates e sue ..., . ....... , .:A- . . . ~ :-"' I How do the muscles make the pupil smaller? Circular muscles Radial muscles A Contract Contract B Contract Relax C Relax Contract D Relax Relax xii.Sickle cell anaemia is an inherited condition caused by a recessive allele 'a'. 'A' is the dominan t allele for the normal condition. Study the given pedigree chart and identify the genotypes of individuals R and S ~ -- -- 'lll R A. B. C. D. Key: AA AA Aa aa s AA Aa Aa aa Q _Normal Female D - Normal Male -Affected male - Affected female 4 ., ,- -2024-25 ICSE xiii.Pulse wave is caused byA. Systole of Atria C. Systole of right ventricle B. Diastole of Atria D. Systole of left ventricle imum in a well- watered wilted xiv. Assertion : Rate of transpiration is max herbaceous plant partial closure of stomata Reason : Flaccidity of guard cells causes A. Assertion is false, Reason is true B. Assertion is true, Reason is false C. Both Assertion and Reason are false Reason is the correct explanation for assertion D. Both Assertion and Reason are true and xv. Assertion: Blood serum can clot n Reason: Blood serum lacks Prothrombi son is the correct explanation for assertion A.Both Assertion and Reason are true and Rea son is not the correct explanation for assertion B.Both Assertion and Reason are true and Rea C. Assertion is true, Reason is false D. Assertion is false, Reason is true Question 2 a. Give reason for the following: /A foetus respires but does not breathe. le with lukewarm salt water. ii.Person suffering from sore throat should garg . )rl':"A person salivates on seeing delicious food [3] . .. ancestors. Study the picture carefully b.The picture below shows various human / and answer the questions: . f ., D C B se features who stor ance an e the hum i.In each case write the letter assigned and nam are described below. I . Had cranial capacity of 600 cc y muscular, inhabitants of western Europe. 2. Exhibited absolute bipedalism, had heav use fire. 3. Walked fully upright and was the first to d chin and was swift footed 4. Lacked eyebrow ridges, had well develope A 5 [5) ICSE 2024-25 ii.Man and present day apes had a common ancestor. Mention two major evolutionary changes that occurred in the ape-like ance stor of humans that differentiated them from apes c. Given below are incorrect statements. Rewrite the following correct stateme nts. [5) il'The Homo sapiens is believed to have arisen from the main Homo erectus populat ion and developed into Homo habilis. /Su nke n stomata are observed in Ban ana leaves. ,.Ci rcu lati on of blood from heart to bod y tissues and back to heart is called Pulmonary circulation. ,.V arie gat ed plants show slower growth than the other plants because they have less chlorophyll means less food to the plant. ~h e shortest phase of the menstrual cycl e is Follicular phase d. Given below is the diagram of a par t of the female reproductive system sho wing the process X . Study the same and answer the following questions: [8] Hlood -- -- 3 i. Label the diagram 1, 2 ,3 and 4 ii.Define the process X. \ I iii.Name P. How is it formed and also state its function? iv. Giv en below are the different stages in fertilization of the ovum. ~ B- :\ , ' \ 0 yU sin g the letters given, arrange the stag es in correct sequential order as they wou ld hav e taken place. / W her e does this process take place in the reproductive system? 6 I I r- 2024-25 ICSE osome number? 3. Which type of cell division forms Q and what is its chrom 4.Which of the above figure is in diploid condition? zation fails to occur? S. What happens in the female reproductive system if fertili e. Arrange the following terms in logical sequence. [4] ion, photons, chlorophyll i. Water molecules, oxygen, grana, hydrogen and hydroxyl n, association neuron )i<"'Motor neuron, hot pan, biceps contracts, sensory neuro , Root cortex, Water and minerals, 7"Pa lisad e cells, root hair cells, Endodennis, Stem Xylem Root Xylem, Veins /4.Karyokinesis, S- phase, Cytokinesis, G1 phase, G2 phase Section B ( 40 marks) Attempt any four of the following ~ Question 3 a.Given below is the diagram of a dicot root as seen in the t~sv erse sectio n. Stud y the ' [6] same and answer the following questions: Q /Lab el the parts numbered 1-4 appear if excessive fertilizers jr.f>raw a neat labelled diagram of part labeled Q as it would are added to soil. )QDefine: ,.A": the process responsible for passage of water molecules from A to {i)h e pressure responsible for movement of water molecules by arrows 7 B. in the direction indicated 2024-25 ICSE h omb Study the same b. The dingrnm below is that of a developing human foetus m t e w [4] and nnswer the questions that follow: 2---'-~ s-- i. Label the parts numbered 1-6 ii.State any two function of X Question 4 a. Given below is a schematic diagram of the section of a leaf showing the occurrence of a physiological process. Study the same and answer the following questions: ,r.--.----2 3, ' ,\ ...... ' l 4 i. Label the parts numbered 1 to 4 ii. Name the substance whose movement is indicated by P iii. Mention the process by which the named substance moves as indicated by1- Thick arrow 2- Thin arrow 3- Dotted arrow iv. Draw a neat labelled diagram of part labelled 4 as seen at 5 a.m. 8 [5] I I ~ ICSE 2024-25 b. The diagram given below shows a schematic representation of the three chambers of a part of th . labelled 1 is the vestibular canal. Study the same and Part ear. llmne~ : answer th [SJ e 10 owmg questions: 1 __ -i,,,,____...; )--'--Pr--2 ~---+.....c::::::.;:~_r-l<----_ j i. Label the parts numbered 2 to 6 ii. Name the fluid present in part labelled 1 iii. State the function of part labelled 7 and P iv., State the function of ear ossicles present in the middle ear cavity. Questions / a.Given below is the diagram of male reproductive system and its associated parts in the [7] human body. Study the same and answer the following questions: /~------ R p 1 2 / Label the parts 1-4 jt:What is the significance of the human testes being located in scrotal sacs outside the abdomen? )it".State the function of part labelled R, P and X jv. State the location of part labelled 1 and 2 9 ICSE 2024-25 .x.Draw a neat labeled diagram of human spenn ~(.Explain the surgical method of contraception for males. b.Answer the following questions. 4xplain any two reasons for the increase of population in India. [3] @.What are IUDs? fi. Explain any two-barrier methods of contraception. Question 6 a.Study the diagram of the section of spinal cord given below and answer the questions: [5] ' ~tate the location of the spinal cord . ...iiName the phenomenon shown above. iiCLabel the parts 1-6 /4What effect does the sympathetic nervous system have on: 1. Pupil of the eye 2. Heart b. Given below is a diagram of a.cell in a particular phase of mitotic cell division. ~Identif y and name the phase of the cell division shown. Give one reason to support your answer ;i1. Draw a neat labelled diagram of the above cell in the next phase. 10 (5] ""' I 2024-25 icSE ' . . os1s . al cell with respect to m.1t 1 t and arum ention two differences between Pan .("M .) division occur? Where in the plan t body does mitotic ce]l . .. . v. Differentiate between Anap hase of m1tos1s and Anaphase I of me1os1s Jv Question 7 /' an heart. Study the same and answer a. The diagram given represents the hum the [4] questions: ~a be l the parts numbered 1-6 seen in the Transverse section. /4r aw a neat labelled diagram of X as [3 1 b. Answer the following questions: ~ a t is a monohybrid cross? Pre dict the fur (B) is dominant over brown fur (b). ,.)d 'n a certain species of animal, Black blac k fur when both the parents are heterozygous genotype and phenotype of the offspring ple. fl!. Defme the law of Mendel applicable to the above exam num ber s copy the table. Write onl y the bla nk /Co mp lete the following table. Do not [3] : wer along with your ans Function Organ / Hormone I Regulates basal metabolism Ethylene 2 Pons 3 4 Break dormancy of seeds and buds 5 inhibits seed germination 6 Glucagon 11

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