Goa Board Class 12 Question Paper Mar 2019 Biology _Voc_

2019 III 05 1000 Seat No.

Time : 2 Hours BIOLOGY (Vocational)

Subject Code

V 2 9 2

Total No. of Questions : 5 (Printed Pages : 3) Maximum Marks : 50

INSTRUCTIONS : (i) All questions are compulsory.

(ii) Figures to the right indicate full marks.

(iii) Solve new question on fresh page.

(iv) Draw diagrams wherever specified.

1. (A) Name an anticoagulant present in the saliva of leeches. 1

(B) With suitable examples distinguish between first order consumers and

second order consumers. 2

(C) A forest having casuarina, eucalyptus, cashew and neem trees will

survive better than forest having only casuarina trees. Justify the

statement. 2

(D) Draw a neat labelled diagram of V.S. of flower. 2

(E) Explain how is carbon exchanged between living organisms and non-

living world. 3

2. (A) Write any two possibilities of direct contact of body fluid and

transmission of HIV. 1

(B) State any four characteristics of dicotyledons. 2

(C) Draw a neatly labelled diagram of a monocot plant. 2

(D) Name and explain the type of association between rhizobium bacterium

and leguminous plant. 2

(E) How does abscisic acid prevent water loss in plants ? 3

3. (A) Define the term ‘classification’. 1

(B) Arrange the following taxonomic hierarchy : 1

Genus, Class, Order, Kingdom, Family, Phylum, Species.

(C) Explain the function of nitrogen in plants. 3

(D) Describe in detail characteristics of phylum Mollusca. 5

Or

Describe in detail characteristics of phylum Arthropoda. 5

4. (A) Tiger captures and feeds on deer. Name the type of association. 1

(B) Define ‘scavenging’. 1

(C) Give a graphic representation of cyclic photophosphorylation. 3

(D) State the distinguishing characters of order Coleoptera. 5

Or

State the distinguishing characters of order Lepidoptera. 5

5. (A) What is the role of nitrobacter bacteria in nitrogen cycle ? 1

(B) Draw a neat labelled diagram of section of pollen grain. 1

(C) Give any three functions of ‘auxin’. 3

(D) Give an account of modification of leaves. 5