Life Science Quiz-3

1. Stem is modified into cladode :
(A) Casuarina
(B) Asparagus
(C) Opuntia
(D) Euphorbia

2. Verticillaster type of inflorescence is found in :
(A) Cotton
(B) Datura
(C) Lilium
(D) Ocimum

3. A simple one seeded fruit in which pericarp is fused with seed coat is :
(A) Achene
(B) Caryopsis
(C) Cypsela
(D) Nut

4. The portion of DNA which contains information for an entire polypeptide is called :
(A) Cistron
(B) Muton
(C) Recon
(D) Operon

5. Bicarpellary, syncarpous ovary with axile placentation is seen in :
(A) Solanaceae
(B) Caesalpinaceae
(C) Asteraceae
(D) Malvaceae

6. Alburnum is also called :
(A) Autumn wood
(B) Heart wood
(C) Sap wood
(D) Spring wood

7. The entry of pollen tube into the ovule through micropyle is called :
(A) Porogamy
(B) Mesogamy
(C) Anisogamy
(D) Chalazogamy

8. Type of pollination in Commelina is :
(A) Chasmogamy
(B) Geitonogamy
(C) Xenogamy
(D) Cleistogamy

9. The process of embryo formation without fertilization is known as :
(A) Apospory
(B) Apogamy
(C) Parthenocarpy
(D) Polyembryony

10. Which of the process Cholodny-Went theory is concerned with ?
(A) Photomorphogenesis
(B) Photoperiodism
(C) Phototropism
(D) Photorespiration

11. The hormone present in the liquid endosperm of coconut is :
(A) Cytokinin
(B) Gibberellin
(C) Ethylene
(D) Auxin

12. The phytohormone which influences apical dominance growth is :
(C) GA3
(D) C2H4

13. An example of short day plant is :
(A) Wheat
(B) Maize
(C) Chrysanthemum
(D) Radish

14. The ovary after fertilization is converted into :
(A) Embryo
(B) Endosperm
(C) Fruit
(D) Seed

15. The molecular formula of Chlorophyll ‘a’ is :
(A) C55H72O5N4Mg
(B) C55H70O5N4Mg
(C) C55H72O6N4Mg
(D) C50H72O5N4Mg

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