2022
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Apr 4, 2022
(a) Which holds whole of the water that enters into it (b) Which allows percolating the water slowly from it...
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Apr 4, 2022
(a) It is useful for storage (b) Tubers respire slowly (c) Starch is synthesized in tubers (d) Translocated sucrose is...
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Apr 4, 2022
(a) Their opening and closing is not regulated (b) They allow exchange of gases (c) They always remain closed (d) ...
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Apr 4, 2022
(a) Adhesion (b) Cohesion (c) Osmosis (d) Plasmolysis Ans. (a) Walls of tracheids and vessels of xylem are made up...
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Apr 4, 2022
एक ट्रेन में एक आदमी नोटिस करता है कि वह एक मिनट में 21 टेलीफोन पोस्ट गिन सकता है। यदि...
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Apr 4, 2022
ਇਕ ਟਰੇਨ 50 ਮੀਲ ਪ੍ਰਤੀ ਘੰਟੇ ਦੀ ਰਫਤਾਰ ਨਾਲ 2.5 ਘੰਟਾ ਅਤੇ ਫਿਰ 70 ਮੀਲ ਪ੍ਰਤੀ ਘੰਟਾ ਦੀ ਰਫਤਾਰ ਨਾਲ...
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Apr 4, 2022
एक ट्रक 1 मिनट में 550 मीटर की दूरी तय करता है जबकि बस 45 मिनट में 33 किलोमीटर...
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Apr 4, 2022
दो बसों 300 किमी की यात्रा 7.5 घंटे में पूरी करती है और दूसरी 450 किलोमीटर की यात्रा 9 घंटे...
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Apr 4, 2022
ਇਕ ਕਾਰ 108 ਪ੍ਰਤੀ ਘੰਟੇ ਦੀ ਰਫਤਾਰ ਨਾਲ ਚਲ ਰਹੀ ਹੈ। 15 ਸੈਕੰਡ ਵਿਚ ਇਹ ਕਿਨੀ ਦੂਰੀ ਤੈਹਿ ਕਰਦੀ ਹੈ।...
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Apr 4, 2022
यदि सोहाली अपने घर से कार्यालय तक 16 किमी / घंटा की रफ्तार से चलता है तो वह 5 मिनट...
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Apr 1, 2022
(a) Phloem is present inside the xylem (b) It can not tolerate the injury (c) Vascular bundles are scattered (d) ...
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Apr 1, 2022
(a) Cell wall is elastic, rigid and get stretched (b) Cell wall is living (c) Cell wall is the outer...
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Apr 1, 2022
(a) Its vascular system is not directly connected (b) Its cells are loosely placed (c) It has cells without chloroplast...
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Apr 1, 2022
(a) Diffusion (b) Osmosis (c) Surface...
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Apr 1, 2022
(a) Mineral water (b) Soil water (c) Field capacity (d) Gravitational capacity Ans. (c) In field capacity, the amount of...
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Apr 1, 2022
(a) Clay soil (b) Lome soil (c) Silt soil (d) Sandy soil Ans. (d) Removal of large molecule from...
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Apr 1, 2022
(a) To increase water uptake (b) Because it helps in rooting of cuttings (c) To reduce water loss (d) Because...
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Apr 1, 2022
(a) Vessels (b) Sieve tubes (c) Equal in both (d) Vessels have no lumen Ans. b (36)
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Apr 1, 2022
(a) Mycoplasma (b) Slime body (c) Golgi body (d) None of these Ans. b (29)
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Apr 1, 2022
Cytoplasm of sieve tube (b) Vacuole of sieve tube (c) Cytoplasm and vacuole for a system (d) None of these...
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Apr 1, 2022
(a) Vessels (b) Tracheids (c) Seive tubes (d) Fibres Ans. (d) Fibres are sclerenchymatous. They have thick wall and provide...
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Apr 1, 2022
(a) O bonds (b) H bonds (c) OH bonds (d) S bonds Ans. (b) Salting of pickles and addition of...
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Apr 1, 2022
(a) Xylem and pith (b) Xylem and phloem (c) Phloem to epidermis (d) Phloem to pith Ans. b (49)
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Apr 1, 2022
(a) More than phloem (b) Lesser than phloem (c) Equal in both (d) None of these Answer: (b) In phloem,...
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Apr 1, 2022
(a) Stomatal movements (b) Both water and food transport (c) Water transport (d) Food transport Ans. (a) Dry gum or...
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Apr 1, 2022
(a) Xylem vessels (b) Xylem tracheids (c) Sieve tubes (d) All the above Answer: C (11)
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Apr 1, 2022
(a) All dead cells (b) Intercellular spaces (c) Cell wall spaces (d) All together Ans. (b) Meaning of diffusion is...
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Apr 1, 2022
(a) Lenticels, wounds and breaks around branch roots (b) Roots and root hairs (c) Root cap (d) (a) and (c)...
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Apr 1, 2022
(a) Hadrom (b) Leptom (c) Bast (d) All the above Ans. (b) Because the concentration of cytoplasm of pollen grains...
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Apr 1, 2022
(a) Such plants are acquired much of height (b) They have poorly developed or entirely absent root hairs (c) Their...
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Apr 1, 2022
एक व्यक्ति 5 मिनट में 600 मीटर लंबी सड़क पार करता है। किमी प्रति घंटे में उसकी गति क्या...
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Apr 1, 2022
(a) Terminal portion of roots (b) Zone of cell elongation (c) Zone of cell formation (d) Zone of cell differentiation...
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Apr 1, 2022
(a) Hydrophobic (b) Permeable (c) Semipermeable (d) Impermeable Ans. d (9)
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Apr 1, 2022
(a) Black cotton soil (b) Sandy soil (c) Red soil (d) Ioamy soil Ans. (b) A variety of mineral elements...
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Apr 1, 2022
(a) Suction of water and minerals due to transpiration pull (b) Cyclosis in cell cytoplasm (c) Sugar transport in...
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Apr 1, 2022
(a) High temperature (b) ATP (c) Alkaline pH (d) Salts Answer: (b) Energy is usually provided by ATP...
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Apr 1, 2022
(a) Wood parenchyma (b) Tracheids (c) Trachea (d) Wood fibre Answer: (a) Wood (xylem) parenchyma are the living parenchymatous cells....
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Apr 1, 2022
(a) Sieve tube (b) Companion cells (c) Bast parenchyma (d) All the above Answer: d) In phloem, sieve...
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Apr 1, 2022
(a) Xylem (b) Phloem (c) Parenchyma (d) None of these Answer: (b) On removing the ring of bark, phloem...
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Apr 1, 2022
Exchange of substances between individual cells and their environments takes place by (a) Osmosis (b) Diffusion (c) Active transport ...