NEET-UG Biology · Class 11
Stem and leaf, and how each is modified — NEET & JEE Questions
Stem and leaf, and how each is modified is a topic in Morphology of Flowering Plants, a Class 11 Biology chapter of the NEET-UG syllabus. TestBudy holds 13 published NEET-UG questions on Stem and leaf, and how each is modified, each with the marking scheme of the real paper.
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Stem and leaf, and how each is modified MCQs with solutions
10 of the 13 published questions on this topic, exactly as they appear in a test. Answers and worked solutions come with your result rather than on this page.
Which underground stem modification is found in potato?
- A. Tuber
- B. Rhizome
- C. Corm
- D. Bulb
How can a potato tuber be recognised as a stem rather than a root?
- A. It bears nodes and buds called eyes
- B. It absorbs water from the soil
- C. It stores starch
- D. It grows below ground
A potato tuber is considered a modified stem mainly because it
- A. bears nodes and buds called eyes
- B. has root hairs
- C. lacks vascular tissue
- D. develops only from the radicle
A tendril formed from a leaf or leaflet mainly helps the plant in
- A. climbing and support
- B. water absorption from soil
- C. nitrogen fixation
- D. secondary growth
Bulliform cells are responsible for
- A. Inward curling of leaves in monocots.
- B. Protecting the plant from salt stress.
- C. Increased photosynthesis in monocots.
- D. Providing large spaces for storage of sugars.
Which of the following statement is not correct?
- A. The rhizome is thick, prostrate and branched
- B. Rhizome is a condensed form of stem
- C. The apical bud in rhizome always remains above the ground
- D. The rhizome is aerial with no distinct nodes and internodes
Identify the correct set of statements: (a) The leaflets are modified into pointed hard thorns in Citrus and Bougainvillea (b) Axillary buds form slender and spirally coiled tendrils in cucumber and pumpkin (c) Stem is flattened and fleshy in Opuntia and modified to perform the function of leaves (d) Rhizophora shows vertically upward growing roots that help to get oxygen for respiration (e) Subaerially growing stems in grasses and strawberry help in vegetative propagation Choose the correct answer from the options given below:
- A. (b) and (c) only
- B. (a) and (d) only
- C. (b), (c), (d) and (e) only
- D. (a), (b), (d) and (e) only
A climbing plant bears a slender coiled structure arising from an axillary bud and used for support. Which organ has been modified?
- A. Stem
- B. Root
- C. Leaflet
- D. Stipule
In a desert plant, leaves are reduced to spines while a green flattened stem performs photosynthesis. What is the main adaptive advantage of this arrangement?
- A. Reduced water loss while maintaining photosynthesis
- B. Increased transpiration and cooling
- C. Greater dependence on leaf stomata
- D. Elimination of the need for chlorophyll
Organ X is green, flattened, bears nodes and performs photosynthesis; organ Y is a leaf modified into a spine. Which observation most strongly supports the conclusion that X is a stem?
- A. Presence of nodes and axillary buds
- B. Green colour
- C. Exposure to sunlight
- D. Ability to photosynthesise
Common mistakes in Stem and leaf, and how each is modified
Recorded against questions in this topic that are not shown above, so none of these points at an answer you can see on this page.
- Calls every underground organ a root despite clear stem characters.
- Identifies the photosynthetic stem as a leaf merely because it is green and flattened.
- Classifies modifications only by function without considering organ origin.
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