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Half Yearly Examination · PDF file (i) Differentiate between direct and indirect development. (ii) Differentiate between Cartilaginous and bony fishes. [2+3] Chapter 5 – Morphology

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    Half Yearly Examination

    Date : _________ Biology (Set-1)

    CLASS Duration: 3 Hr. Max. Marks : 70 XI

    Chapter 1 – The Living World 1. Define taxon? [1] 2. Which is the lowest and highest taxonomic category? [1] 3. (a) Define class of taxonomic hierarchy? (b) What are the six rules of binomial nomenclature? [1+2] 4. (a) What are taxonomical aids. Name any 3 of them. (b) How is a key helpful in the identification and classification of an organism? [2+3]

    Chapter 2 – Biological Classification 5. You have given old preserved permanent slide without a label. You placed a slide under

    microscope and observed following: (i) Unicellular; (ii) Well defined nucleus; (iii) It has 2 flagella- one longitudinal and one transverse. Identify the organism and kingdom, it belongs to? [1] 6. Name a fungi which is used extensively in biochemical and genetic work? [1] 7. What are the 3 steps in sexual reproduction of fungi? [3] 8. (i) How are viroids different from viruses. (ii) State any 3 differences between 5 kingdoms according to five kingdom classification. [2+3]

    Chapter 3 – Plant Kingdom 9. What is protonema? [1] 10. What is Cytotaxonomy? [1] 11. During a visit to a village in remote area, Shivam asked the floriculturists, how does he

    transport cut flowers and plants safely to the city. He replied that he uses one of the aquatic moss for this purpose.

    (i) Which aquatic moss was he using. (ii) How did moss prevent the spoilage of plants and flowers. (iii) Any other important property associated with moss. [3] 12. (i) Explain haplo-diplontic life cycle with a suitable diagram? (ii) Which event is the precursor to the seed habit in pteridophytes? [3+2]

    Chapter 4 – Animal Kingdom 13. Round worms belong to phylum ________ and flatworms belong to phylum ________. [1] 14. What are Poikilothermous animals? [1]

    General instruction: 1. You have to attempt questions from any 7 chapters. 2. Do not write anything in the question paper. 3. Read the questions properly and attempt answers accordingly.

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    15. Mohan studied 3 organisms – A, B and C under a microscope. He found all of them are bilaterally symmetrical and triploblastic. A has long and cylindrical body, B has dorsoventrally flattened body whereas body of C was soft with ring like segments. Identify their classes and write one identifying feature of each? [3]

    16. (i) Differentiate between direct and indirect development. (ii) Differentiate between Cartilaginous and bony fishes. [2+3]

    Chapter 5 – Morphology of Flowering Plants 17. Name one bisexual and one unisexual flower? [1] 18. Tendrils of grapevine are homologous to the tendrils of pumpkin but analogous to that of pea.

    Justify the statement. [1] 19. (i) Which layer is the edible part in mango. (ii) What are Endospermic and non-endospermic seeds. Give an example each? [1+2] 20. (i) Describe the different arrangement of floral members in relation to their insertion on

    thalamus? (ii) Name any 2 sub-aerial stem modifications? [3+2]

    Chapter 6 – Anatomy of Flowering Plants 21. A cross section of a plant part shows following: (i) Radial vascular bundles, (ii) Polyarch xylem, (iii) Well developed pith Which part is that? [1] 22. Grittiness in fruits like guava and pear is due to presence of ___________. [1] 23. Differentiate between dicot stem and monocot stem? [3] 24. (i) What is endarch and exarch xylem. (ii) Explain briefly the structure of dicot stem with a suitable diagram. [2+3]

    Chapter 7 – Structural Organisation in Animals 25. Which organ in human body contains all 4 types of tissues i.e., epithelial, connective, muscular

    and neural? [1] 26. What is the role of macrophages? [1] 27. Explain the structure of skeletal muscle tissue? [3] 28. Give one word or a line for following-: [5] (a) Which tissue is present in proximal convoluted tubule (PCT) of nephron in the kidney. (b) How many times does a nymph of a cockroach moult to reach adult form. (c) Name the structure which acts as a tongue in cockroach. (d) Exoskeleton of cockroach is made by _____________. (e) Name the types of agranulocytes. (f) Function of tendon. (g) Testes in male cockroach is present in _______________ abdominal segments. (h) _______________ are present at fusion points of cardiac muscles. (i) Name 3 cell junctions. (j) Give an example of multicellular glandular epithelium.

    Chapter 8 – Cell – The Unit of Life 29. What are plasmodesmata? [1] 30. What are the two subunits of prokaryotic and eukaryotic ribosomes? [1] 31. In a lab Sheryl and her friend Shambhavi saw mitochondria under high power compound

    microscope. They saw a number of folds projecting from inner membrane and a lot of dot like structures fixed on inner membrane?

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    (i) What is the name given to these folds. (ii) What are these dot like structures called? (iii) What is the role of these folds and dots like structures? [3] 32. (i) Differentiate between gram positive and gram negative bacteria. (ii) Briefly describe the structure of Mitochondria with the help of a diagram. [2+3]

    Chapter 9 – Biomolecules 33. Why an enzyme catalyses only a specific reaction? [1] 34. What is turn over number of enzymes? [1] 35. (i) Why does starch give blue black colour with iodine and not cellulose? (ii) Where is chitin found? [2+1] 36. (i) Mention any 3 functions of proteins? (ii) How does low temperature present inside cold storages prevents spoilage of food? [3+2]

    Chapter 10 – Cell Cycle and Cell Division 37. Name 2 cells, which do not divide after attaining full differentiation? [1] 38. What is Go (quiescent phase) of cell cycle? [1] 39. Name the stage of cell cycle at which one of the following events occur: [3] (i) Chromosomes are moved to spindle equator. (ii) Centromere splits and chromatids separate. (iii) Pairing between homologous chromosomes takes place. (iv) Crossing over between homologous chromosomes takes place. (v) Chiasmata appears. (vi) We can see bouquet stage. 40. (i) Describe the following with the help of a suitable diagram. (a) synapsis (b) bivalent (c) chiasmata (ii) Distinguish anaphase of mitosis from anaphase I of meiosis. [3+2]

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    Hints/Solutions to Half Yearly Examination

    Date : _________ Biology (Set-1)

    CLASS Duration: 3 Hr. Max. Marks : 70 XI

    Chapter 1 – The Living World 1. Taxon (pl. taxa) – It is a unit of classification, which represents a rank or category based on

    certain easily observable common characteristics. 2. Species is the lowest category and Kingdom is the highest taxonomic category. 3. (i) Group of related orders is class. (ii) Biological names are generally in Latin and written in italics. They are Latinised or derived

    from Latin irrespective of their origin. – Each organism is given only one name consisting of two words - Generic name and

    the specific epithet. – The first word in a biological name represents the genus while the second component

    denotes the specific epithet. – Both the words in a biological name, when handwritten, are separately underlined,

    or printed in italics to indicate their Latin origin. – The first word denoting the genus starts with a capital letter while the specific epithet

    starts with a small letter. – Name of the author appears after the specific epithet, i.e., at the end of the biological

    name and is written in an abbreviated form. 4. (i) Techniques, procedures and stored information that are useful in identification and

    classification of organisms are called as taxonomic aids. Ex – Herbarium, biological museum, zoological park and key.

    (ii) – Key is an taxonomical aid used for identification of plants and animals based on the similarities and dissimilarities.

    – It is a analytical device used by biologists for identifying unknown organisms. – The key consists of a series of choices, based on observed features of the organism. – A single pair of contrasting characters is called a couplet and each statement of a

    couplet is termed a lead. – It provides a choice between two opposite options (couplet), resulting in the

    acceptance of one and the rejection of the other. – By making the correct choice at each level of the key, one can eventually arrive at the

    name of the unknown organism. – Separate taxonomic keys are required for each taxonomic category such as family,

    genus and species for identification purposes.

    Chapter 2 – Biological Classification 5. It is an Dinoflagellates, which belongs to Kingdom Protista. 6. Neurospora. 7. Sexual reproduction in Fungi – It involves formation and union of two gametes or their nuclei.

    Sexual reproduction is absent in deuteromycetes. The various spores are produced in distinct structures called fruiting bodies. The sexual cycle involves the following three steps-:

    (i) Plasmogamy - Fusion of protoplasms between two motile or non-motile gametes called plasmogamy.

    (ii) Karyogamy - Fusion of two nuclei called karyogamy.

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    – In some fungi the fusion of two haploid cells immediately results in diploid cells (2n). However, in other fungi (ascomycetes and basidiomycetes), an intervening dika

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