Download "Plant Diversity- Botany Paper A" Previous Years Question Paper of B.Sc. (General) for 1st Semester.

B.Sc. (General) 1st Semester

BOTANY 

Paper-A: Plant Diversity-I

Time Allowed: Three Hours] [Maximum Marks: 36 

Note :-( 1) Attempt five questions in all.

(2) Question No. 1 is compulsory. 

(3) Attempt four more questions, selecting one from each unit

(4) Draw diagrams wherever necessary. 

1. (A) Fill in the blanks :

(i) The filament of Oscillatoria is called________.

(ii) The reserve food material in Dictyota is_____________.

 (ii)______________ is a unicellular ascomycete. 

(iv) Multinucleate gametes in Rhizopus are known as________________.

(v) The plant body of Volvox is multicellular motile colony called as _____________.

(vi) Alternate host of Puccinia graminis tritici is_________________. 6x1=6

UNIT-I 

2. With the help of suitable diagrams describe the sexual reproduction in Vaucheria. 6

3. Write notes on: 

(a) Thallus structure of Volvox 

(b) Cell structure of Bacteria. 3,3 

UNIT-II

4. Briefly discusses the economic importance of algae as food and in industry. 6

5. Describe the following: 

(a) Post fertilization changes in Batrachospermum 

(b) Asexual reproduction in Dictyota. 3,3

UNIT-III 

6. Give an account of the causal organism, symptoms, and disease cycle of white rust of crucifers. 6

7. (a) Explain thallus of Rhizopus.

(b) Give a diagrammatic sketch to illustrate the life cycle of Saccharomyces cerevisiae.3,3

UNIT-IV 

8. Describe the life cycle of Puccinia graninis tritici on wheat. 6

9. Write notes on any two of the following: 

(a) Acervulus of Colletotrichum 

(b) Basidiocarp of Agaricus 

(c) Symptoms of loose smut of wheat. 3,3

(B) Multiple choice questions : 

(i) Gongrosira stage is found in :

(a) Oscillatoria (b) Cladophora

(c) Vaucheria (d) Volvox 

(ii) Chloroplasts are reticulate in :

(a) Vaucheria (b) Dictyota

(c) Volvox (d) Cladophora 

(iii) Wart-like swellings on the upper surface of lichen thallus are : 

(a) Cephalodia (b) Cyphellae

(c) Soredia (d) Isidia 

(iv) Colletotrichum falcatum causes :

(a) Red rot of sugarcane (b) Loose smut of wheat 

(c) Black rust of wheat    (d) White rust of crucifers

(v) Glomerule occurs in:

(a) Dictyota                   (b) Vaucheria 

(c) Batracospermum   (d) Volvox 

(vi) In Oscillatoria reproduction occurs by :

(a) Conjugation 

(b) Budding 

(c) Hormogones 

(d) Sporulation 6x1=6