1. Which of the following is a modified underground stem for storage?
Answer:
Explanation:
Bulbs, like those of the onion, are modified underground stems that store nutrients and energy for the plant.
2. What type of venation does a mango leaf exhibit?
Answer:
Explanation:
Mango leaves have a branching pattern of veins, which is referred to as reticulate venation.
3. Which of the following plants exhibits dimorphic leaves?
Answer:
Explanation:
Pea plants have both regular photosynthetic leaves and tendrillar leaves for climbing, exhibiting dimorphism.
4. In sunflower, the main stem grows in thickness due to:
Answer:
Explanation:
Lateral meristems, including the vascular cambium and cork cambium, are responsible for the secondary growth or increase in thickness of stems.
5. A type of inflorescence where the main axis continues to grow and bears flowers laterally on lateral axes is:
Answer:
Explanation:
In racemose inflorescence, the main axis keeps growing and doesn’t terminate in a flower but bears flowers on its sides.
6. Which plant has a fibrous root system?
Answer:
Explanation:
In a fibrous root system, like that of wheat, the primary root is short-lived and replaced by a large number of fine fibrous roots.
7. In which of the following is phyllotaxy opposite?
Answer:
Explanation:
Phyllotaxy refers to the arrangement of leaves on a stem. In China rose, leaves are oppositely arranged.
8. The main function of stipules is:
Answer:
Explanation:
Stipules are small leaf-like structures at the base of a leaf stalk and may protect young leaves or buds.
9. Which plant exhibits a tendril?
Answer:
Explanation:
Tendrils are modified leaves or stems that help plants to climb. In pea plants, tendrils assist in climbing.
10. The tomato is an example of which type of fruit?
Answer:
Explanation:
A berry is a fleshy fruit without a stone, developed from a single ovary, and the tomato is a typical example of a berry.
11. Which of the following plants bear hygroscopic roots?
Answer:
Explanation:
Rhizophora plants, commonly known as mangroves, have specialized roots called pneumatophores that come out of the ground and help in gaseous exchange.
12. In which of the following, the plants are all roots?
Answer:
Explanation:
Podostemon is a type of aquatic plant where the entire plant appears as a mass of roots.
13. The region of root hair in a root lies just behind:
Answer:
Explanation:
Root hairs are outgrowths of epidermal cells and are found in the region of maturation.
14. In one of the following the stem performs the function of storage and perennation:
Answer:
Explanation:
In ginger, the stem is modified to form rhizome which performs the functions of storage and perennation.
15. Lack of which element has made some plants insectivorous:
Answer:
Explanation:
Some plants grow in nitrogen-deficient soils. To make up for this deficiency, they have evolved as insectivorous plants to obtain nitrogen from insects.
16. Velamen absorbs moisture from:
Answer:
Explanation:
Velamen is a spongy tissue found in some epiphytic orchids which helps in absorbing moisture from the air.
17. Leaves are changed into spines in xerophytic structures called:
Answer:
Explanation:
In some xerophytes, the stem becomes green and takes over the photosynthetic function of the leaves. The leaves get modified into spines to reduce transpiration. The green stem is called a phylloclade.
18. In guava, cucurbits flowers are:
Answer:
Explanation:
In guava and cucurbits, flowers can be either hypogynous or perigynous.
19. Seed coat is not thin, membranous in:
Answer:
Explanation:
The seed coat of a coconut is fibrous and tough, not thin or membranous.
20. What is the characteristic of haustorial roots of Cuscuta?
Answer:
Explanation:
Cuscuta, a parasitic plant, has haustorial roots that penetrate the host plants to absorb nutrients. These roots predominantly have phloem to transport the absorbed nutrients.
21. Which part of the flower is a highly modified stem?
Answer:
Explanation:
The thalamus is a part of the flower that is a modified or compressed stem where all the parts of the flower are attached.
22. Which plant lives in nitrogen-deficient soil?
Answer:
Explanation:
Drosera, commonly known as the sundew, is an insectivorous plant. It has adapted to live in nitrogen-deficient soils by trapping and digesting insects to obtain necessary nutrients.
23. Angiosperms differ from gymnosperms in:
Answer:
Explanation:
The main distinguishing feature of angiosperms is the presence of flowers and fruits with seeds inside. The ovules in angiosperms are enclosed within an ovary.
24. When any part other than the blade of a leaf becomes flattened to perform the function of a leaf, it is:
Answer:
Explanation:
A phyllode is a modified leaf where the petiole or the rachis becomes flattened and takes over the photosynthetic function of the leaf blade.
25. Pericarp and placentae are the edible part of which simple fleshy berry fruit?
Answer:
Explanation:
In tomatoes, both the pericarp and placentae are consumed. The pericarp constitutes the fleshy part while the placentae hold the seeds inside the fruit.
26. Which of the following are the characteristic features of solanaceae?
Answer:
Explanation:
The Solanaceae family, commonly known as the nightshade family, typically has exstipulate leaves and a persistent calyx.
27. Leaf lamina is reduced in:
Answer:
Explanation:
In xerophytes, the leaf lamina is often reduced to minimize water loss through transpiration due to the dry conditions they live in.
28. Grasses are examples of which type of stem?
Answer:
Explanation:
Grasses typically have rhizomatous stems which grow horizontally under the ground and help in vegetative propagation.
29. The leaves of dicotyledonous plants are mostly:
Answer:
Explanation:
In dicotyledonous plants, stomata are primarily found on the lower surface of the leaves, hence they are termed hypostomatic.
30. Parallel multicostate venation is found in:
Answer:
Explanation:
In palm leaves, the veins run parallel to each other from the base to the tip, a characteristic feature of monocots.
31. The tendrils in smilax are the modification of:
Answer:
Explanation:
In Smilax, tendrils which assist in climbing are modified leaves.
32. The vegetable cabbage is:
Answer:
Explanation:
Cabbage is a collection of leafy layers which is essentially a modified terminal bud.
33. The edible portion in radish is:
Answer:
Explanation:
Radish is a root vegetable where the primary edible part is the swollen taproot.
34. The flower is a modified:
Answer:
Explanation:
A flower is considered a modified shoot where the floral organs are modified leaves arranged on a shortened axis.
35. In potato, food is stored in:
Answer:
Explanation:
In potatoes, the food is stored in the form of starch in underground modified stems known as tubers.
36. If the leaf base is swollen, it is called:
Answer:
Explanation:
A swollen leaf base that is often involved in movements of leaves, especially in response to light, is called a pulvinus.
37. Mint plant produces:
Answer:
Explanation:
Mint plants produce stolons, which are horizontal stems that grow at the soil surface or just below it, leading to vegetative propagation.
38. The spice clove is dried:
Answer:
Explanation:
Clove is the dried unopened flower bud of the clove tree.
39. Spot out the stranger:
Answer:
Explanation:
Brinjal (or eggplant) is the odd one out as it is a fruit, while the others (Radish, Carrot, and Turnip) are roots.
40. Succulents are likely to be found in:
Answer:
Explanation:
Succulents are plants that store water in their fleshy stems or leaves. They are specially adapted to survive in arid desert conditions.
41. The family Cruciferae is also known as:
Answer:
Explanation:
The family Cruciferae is also known as Brassicaceae. It includes plants like mustard, radish, and cabbage.
42. In Compositae, the placentation is:
Answer:
Explanation:
In the family Compositae (or Asteraceae), the ovules are attached to a central axis in the ovary, which is characteristic of free central placentation.
43. Mimosa belongs to the family:
Answer:
Explanation:
Mimosa belongs to the subfamily Mimosoideae, which is a part of the Fabaceae family.
44. Perianth is reduced to lodicules in the family:
Answer:
Explanation:
In the grass family (Gramineae or Poaceae), the perianth is represented by small, scale-like structures called lodicules.