- An improved variety of transgenic basmati rice
(a) Gives high yield and is rich in vitamin A
(b) Is completely resistant to all insect pests and
diseases of paddy
(c) Does not require chemical fertilisers and
growth hormones
(d) Gives high yield but has no characteristic
aroma
- Nitrogen-fixation in root nodules of Alnus is
brought about by
(a) Bradyrhizobium (b) Clostridium
(c) Frankia (d) Azorhizobium
- Which one of the following pairs is not correctly
matched?
(a) Gibberellic acid – Leaf fall
(b) Cytokinin – Cell division
(c) IAA – Cell wall elongation
(d) ABA – Stomatal closure
- Match the following and choose the correct
combination from the options given:
Column I Column II
A. Tallest tree P. Macrocytis
in Gymnosperms
B. Smallest Q. Pteridophyte
flowering plant
C. Seedless vascular R. Wolffia
cryptogram
D. Largest S. Sequoia
perennial algae
(a) A-P, B-Q, C-R, D-S
(b) A-S, B-R, C-Q, D-P
(c) A-Q, B-P, C-R, D-S
(d) A-Q, B-R, C-S, D-P.
- Which of the following options gives the correct
sequence of events during mitosis?
(a) Condensation g nuclear membrane
disassembly g crossing over g
segregationg telophase
(b) Condensationg nuclear membrane
disassembly g arrangement at equatorg
centromere division g segregation g
telophase
(c) Condensation g crossing over g nuclear
membrane disassembly g segregation
gtelophase
(d) Condensation g arrangement at equator
gcentromere division g segregation g
telophase
- A self fertilising trihybrid plant forms :
(a) 4 different gametes and 16 different zygotes
(b) 8 different gametes and 32 different zygotes
(c) 8 different gametes and 64 different zygotes
(d) 8 different gametes and 16 different zygotes
