7
MCQ (Single Correct Answer)
Many pulses of daily use belong to one of the families below.
A
Solanaceae
B
Fabaceae
C
Liliaceae
D
Poaceae
8
MCQ (Single Correct Answer)
The placenta is attached to the developing seed near the
A
testa
B
hilum
C
micropyle
D
chalaza
9
MCQ (Single Correct Answer)
Which of the following plants is used to extract the blue dye?
A
Trifolium
B
Indigofera
C
Lupin
D
Cassia
10
MCQ (Single Correct Answer)
Match the following columns.
| Column I | Column II | ||
|---|---|---|---|
| A. | Aleurone layer | 1. | Nutrition |
| B. | Parthenocarpic fruit | 2. | Without fertilisation |
| C. | Ovule | 3. | Seed |
| D. | Endosperm | 4. | Double fertilisation |
A
A-1, B-2, C-3, D-4
B
A-2, B-1, C-4, D-3
C
A-4, B-2, C-1, D-3
D
A-2, B-4, C-1, D-3
11
Roots obtain oxygen from air in the soil for respiration. In the absence or deficiency of $\mathrm{O}_2$, root growth is restricted or completely stopped. How do the plants growing in marsh lands or swamps obtain their $\mathrm{O}_2$ required for root respiration?
Explanation
The roots of the plants (e.g., Rhizophora) growing in marshy/swamp areas become negatively geotropic. They grow vertically upwards in air, above the soil level and respire so called respiratory roots or pneumatophores.