Some vascular bundles are described as open because these
Options
(a) are surrounded by pericycle but not endodermis (b) are capable of producing secondary xylem and phloem (c) possess conjunctive tissue between xylem […]
Function of companion cells is
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(a) providing energy to sieve elements for active transport (b) providing water to phloem (c) loading of sucrose into sieve elements by passive transport (d) loading of […]
In Kranz anatomy, the bundle sheath cells have
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(a) thin walls, many intercellular spaces and no chloroplasts (b) thick walls, no intercellular spaces and large number of chloroplasts (c) thin walls, no […]
Heartwood differs from sapwood in:
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(a) presence of rays and fibres (b) absence of vessels and parenchyma (c) having dead and non -conducting elements (d) being susceptible to pests and pathogens
Correct […]
Passage cells are thin walled cells found in
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(a) phloem elements that serve as entry points for substance for transport ot other plant parts (b) testa of seeds to enable emergence of […]
Pentamerous, actinomorphic flowers, bicarpellate ovary with oblique septa and fruit a capsule of berry, are characteristic features of
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(a) Brassicaceae (b) Solanaceae (c) Liliaceae (d) Asteraceae
Correct Answer:
Solanaceae
Explanation:
Pentamerous, actinomorphic […]
Velamen is found in
Options
(a) ferns (b) halophytes (c) orchids (d) gymnosperms
Correct Answer:
orchids
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting […]
Secondary phloem remains functional generally
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(a) less than 1 year (b) more than 1 year (c) for 1 year (d) as long as plant lives
Correct Answer:
for 1 year
Explanation:
No […]
Which of the following is the largest root parasite
Options
(a) Rafflesia (b) Areuthobium (c) Monotrapa (d) Pistia
Correct Answer:
Rafflesia
Explanation:
No explanation available. Be the first to write the explanation for […]
Desert grasses often roll their leaves due to presence of
Options
(a) oily surface (b) bulliform cells (c) spines (d) none of these
Correct Answer:
bulliform cells
Explanation:
No explanation available. Be the […]
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