Aestivation of petals in the flower of cotton is correctly shown in:
| 1. | 2. | ||
| 3. | 4. |
| 1. | Valvate | 2. | Vexillary |
| 3. | Imbricate | 4. | Twisted |
Which of the following plant family has marginal placentation?
1. Solanaceae
2. Fabaceae
3. Liliaceae
4. Brassicaceae
| 1. | storage of food |
| 2. | absorbing water from the deeper layers of soil |
| 3. | nitrogen fixation |
| 4. | providing good anchorage to the plant |
Identify the incorrect comparison between monocots and dicots in general:
| Character | Monocots | Dicots | |
| 1. | Leaves | Parallel venation | Reticulate venation |
| 2. | Roots | Primary root of short duration, replaced by adventitial roots forming fibrous or fleshy root systems | Develops from the radicle. Primary root often persists forming strong tap roots and secondary roots |
| 3. | Plant stem: Vascular bundles | Ring of primary bundles with cambium, differentiated into cortex and stele | Numerous scattered bundles in ground parenchyma, cambium mostly absent, no differentiation between cortical and stelar regions |
| 4. | Flowers | Parts in threes (trimerous) or multiples of three | Fours (tetramerous) or fives (pentamerous) |
Match each item in Column I with one item in Column II and chose your answer from the codes given below.
|
Column I (Phyllotaxy) |
Column II (Example) |
|
I. Alternate II. Opposite III. Whorled |
1. Calotropis 2. Mustard 3. Alstonia |
Codes:
I II III
1. 1 2 3
2. 3 1 2
3. 2 1 3
4. 1 3 2
| I: | Phyllotaxy is whorled. |
| II: | Flower is hypogynous. |
Which of the following shows whorled phyllotaxy?
| 1. | Mustard | 2. | China rose |
| 3. | Alstonia | 4. | Calotropis |
| 1. | near similar sizes of vascular bundles, including main veins, as seen in vertical sections of the leaves. |
| 2. | near similar sizes of vascular bundles, except in main veins, as seen in vertical sections of the leaves. |
| 3. | large sizes of vascular bundles in mid rib and smaller in veins, as seen in vertical sections of the leaves. |
| 4. | smaller sizes of vascular bundles in mid rib and larger in veins, as seen in vertical sections of the leaves. |
Select the correct statements related to the activity of cork cambium:
| 1. | The outer cells differentiate into phelloderm. |
| 2. | The cork differentiated from cork cambium, is impervious to water due to deposition of tannins and resins. |
| 3. | Cuts the cells only on the outer side. |
| 4. | Cuts the cells on inner as well as outer side. |
Which of the following statements about cork cambium is incorrect?
| 1. | It forms a secondary cortex on its outside |
| 2. | It forms a part of periderm |
| 3. | It is responsible for the formation of lenticels |
| 4. | It is a couple of layers thick |
| A: | Lenticels are the lens-shaped openings permitting the exchange of gases. |
| B: | Bark formed early in the season is called hard bark. |
| C: | Bark is a technical term that refers to all tissues exterior to vascular cambium. |
| D: | Bark refers to periderm and secondary phloem. |
| E: | Phellogen is single- layered in thickness. |
| 1. | B and C only | 2. | B, C and E only |
| 3. | A and D only | 4. | A, B and D only |
| I: | It usually develops in the cortex region and is a couple of layers thick. |
| II: | It cuts off cells on both sides where the inner cells differentiate into cork and the outer cells differentiate into secondary cortex. |
Identify the incorrectly matched pair:
| 1. | Dicot root | Parenchymatous conjunctive tissue between xylem and phloem |
| 2. | Monocot root | Polyarch xylem bundles and well-developed pith |
| 3. | Isobilateral leaf | Palisade and spongy parenchyma in mesophyll |
| 4. | Dorsiventral leaf | Bulliform cells are absent |
| a. | Lack vessels |
| b. | have sieve tube elements |
| c. | Have elongated tube like highly lignified main water transporting tissue |
| d. | Lack lateral meristem |
| 1. | Leguminosae | 2. | Malvaceae |
| 3. | Cruciferae | 4. | Compositae |
Phloem fibres are
| 1. | also known as bast fibres |
| 2. | made up of sclerenchymatous cells |
| 3. | absent in primary phloem |
| 4. | All of these |
In a longitudinal section of a root, starting from the tip upward, the four zones occur in the following order:
| 1. | Root cap, cell division, cell maturation, cell enlargement |
| 2. | Cell division, cell enlargement, cell maturation, root cap |
| 3. | Cell division, cell maturation, cell enlargement, root cap |
| 4. | Root cap, cell division, cell enlargement, cell maturation |
The diagram given below belongs to -
| 1. | Dicot stem having conjoint and collateral vascular bundles |
| 2. | Monocot stem having conjoint and collateral vascular bundles |
| 3. | Dicot root with polyarch condition |
| 4. | Monocot root with radial vascular bundles |