Goa Board Class 12 Question Paper June 2018 Biology _Vocational_

*V292* 2018 VI 08 14301000 Seat No. : Time : 2 Hours biology (Vocational) Subject Code V 2 9 2 Total No. of Questions : 5 (Printed Pages : 2) Maximum Marks : 50 Instructions : i) All questions are compulsory. ii) Write the number of the question and sub-question clearly. iii) Answer each question on a fresh page. iv) Draw neat diagrams wherever specified in lead pencil only. v) Figures to the right indicate full marks. 1. A) Define species. [1] B) Give any one use of phosphorus in living organisms. [1] C) A potted plant kept outside on a dry sunny day showed wilting. Name the process and give significance of it. [3] D) What do you mean by modification of root ? Describe different types of tap root modification. [5] OR Give an account of modification of stem. 2. A) Why is blood donor always tested for HIV before transfusion. [1] B) Plant that grow upon other plant only for support. Name the type of plant. [1] C) Explain the functions of Abscisic acid (ABA). [3] D) Describe in detail the characteristics of phylum arthropoda. [5] V-292 -1- P.T.O.

*V292N08* 3. A) Arrange the following in taxonomic hierarchy. [1] Division – Angiospermae Class – Dicotyledonae Kingdom – Plantae Species – Indica Genus – Mangifera B) Distinguish between : [2] a) Primary consumer and secondary consumer. b) Producer and decomposers. C) Draw a neat labelled diagram of V.S. of flower. [2] D) Describe any two characteristics of gymnosperms. [2] E) Explain in short carbon cycle. [3] 4. A) Vulture eats the dead animals. Name the type of association. [1] B) Draw a neat labelled diagram of a pollen grain. [1] C) Give a graphical representation of cyclic photophosphorylation. [3] D) State the distinguishing in characters of order coleoptera. [5] OR State the distinguishing characters of order ephimenroptera. 5. A) Define symbiosis. [1] B) Vegetation grow faster in a forest destroyed by fire than on bare rocks. Name the process and give scientific basis. [2] C) Draw a neat labelled diagram of chlamydomonas. [2] D) Egyptian plover bird walks boldly into the open mouth of a crocodile to peek Leeches from between its teeth. Name and explain the type of association. [2] E) Rose plants grown in a garden showed symptoms of yellow edges of leaves and premature death. Mention the mineral deficiency in the soil and give two function of it. [3] ___________________ V-292 -2-