(a) Which holds whole of the water that enters into it (b) Which allows percolating the water slowly from it (c) Which allows water to pass very quickly from it (d) Which allows limited amount of water to retain into …
(a) It is useful for storage (b) Tubers respire slowly (c) Starch is synthesized in tubers (d) Translocated sucrose is polymerized here Ans. a (4)
(a) Their opening and closing is not regulated (b) They allow exchange of gases (c) They always remain closed (d) They are found on the same organ of plants Ans. a (9)
(a) Adhesion (b) Cohesion (c) Osmosis (d) Plasmolysis Ans. (a) Walls of tracheids and vessels of xylem are made up of lignin and cellulose and have strong affinity for water (adhesion). (18)
एक ट्रेन में एक आदमी नोटिस करता है कि वह एक मिनट में 21 टेलीफोन पोस्ट गिन सकता है। यदि उनके बीच की दुरी 50 मीटर है, तो ट्रेन किस गति से यात्रा कर रही है? ਇਕ ਟਰੇਨ ਵਿਚ ਇਕ …
ਇਕ ਟਰੇਨ 50 ਮੀਲ ਪ੍ਰਤੀ ਘੰਟੇ ਦੀ ਰਫਤਾਰ ਨਾਲ 2.5 ਘੰਟਾ ਅਤੇ ਫਿਰ 70 ਮੀਲ ਪ੍ਰਤੀ ਘੰਟਾ ਦੀ ਰਫਤਾਰ ਨਾਲ 1.5 ਘੰਟਾ ਚਲਦੀ ਹੈ ਇਹਨਾਂ ਚਾਰ ਘੰਟਿਆਂ ਵਿਚ ਰੇਲ ਗੱਡੀ ਕਿੰਨੀ ਦੂਰੀ ਤੈਹ ਕਰਦੀ ਹੈ। a. 120miles b. 150 miles …
एक ट्रक 1 मिनट में 550 मीटर की दूरी तय करता है जबकि बस 45 मिनट में 33 किलोमीटर की दूरी तय करती है। उनकी गति का अनुपात है: ਇਕ ਟਰੱਕ 1 ਮਿੰਟ ਵਿਚ 550 ਮੀ ਦੀ ਦੂਰੀ ਤੈਹਿ …
दो बसों 300 किमी की यात्रा 7.5 घंटे में पूरी करती है और दूसरी 450 किलोमीटर की यात्रा 9 घंटे में पूरी करती है। उनकी औसत गति का अनुपात है: ਦੋ ਬਸਾਂ ਵਿਚੋ ਇਕ 300 ਕਿ. ਮੀ ਦੀ ਦੂਰੀ 7.5 …
ਇਕ ਕਾਰ 108 ਪ੍ਰਤੀ ਘੰਟੇ ਦੀ ਰਫਤਾਰ ਨਾਲ ਚਲ ਰਹੀ ਹੈ। 15 ਸੈਕੰਡ ਵਿਚ ਇਹ ਕਿਨੀ ਦੂਰੀ ਤੈਹਿ ਕਰਦੀ ਹੈ। a. 45 meters b.55 metres c 450 metresd cannot be determined e. NFT Answer: C (9)
यदि सोहाली अपने घर से कार्यालय तक 16 किमी / घंटा की रफ्तार से चलता है तो वह 5 मिनट देर से आता है। यदि वह 20 किमी / घंटा की गति से चलता है, तो वह कार्यालय समय से …
(a) Phloem is present inside the xylem (b) It can not tolerate the injury (c) Vascular bundles are scattered (d) Plants are very delicate Ans. (c) In monocot like sugarcane, maize, etc. due to absence of cambium secondary growth is …
(a) Cell wall is elastic, rigid and get stretched (b) Cell wall is living (c) Cell wall is the outer most layer of plant cell (d) Cell wall is permeable Ans. (a) Cell wall is the outermost, rigid, protective, non …
(a) Its vascular system is not directly connected (b) Its cells are loosely placed (c) It has cells without chloroplast (d) It has no root hair Ans. d (11)
(a) Diffusion (b) Osmosis (c) Surface tension (d) Active transport Ans. (c) (15)
(a) Mineral water (b) Soil water (c) Field capacity (d) Gravitational capacity Ans. (c) In field capacity, the amount of water present in soil against gravitational force is called as field capacity. (11)
(a) Clay soil (b) Lome soil (c) Silt soil (d) Sandy soil Ans. (d) Removal of large molecule from cell is also known as exocytosis. (48)
(a) To increase water uptake (b) Because it helps in rooting of cuttings (c) To reduce water loss (d) Because the cuttings need less food Ans.(c) Because loss of water takes place through leaves by transpiration. (9)
(a) Vessels (b) Sieve tubes (c) Equal in both (d) Vessels have no lumen Ans. b (32)
(a) Mycoplasma (b) Slime body (c) Golgi body (d) None of these Ans. b (25)
Cytoplasm of sieve tube (b) Vacuole of sieve tube (c) Cytoplasm and vacuole for a system (d) None of these Ans. (c) In mycotoplasm, cytoplasm of sieve tubes along with vacuolar system in which water, food …
(a) Vessels (b) Tracheids (c) Seive tubes (d) Fibres Ans. (d) Fibres are sclerenchymatous. They have thick wall and provide mechanical support. (56)
(a) O bonds (b) H bonds (c) OH bonds (d) S bonds Ans. (b) Salting of pickles and addition of sugar to jams prevent their decay by microbes, or the later get killed due to plasmolysis or due to high …
(a) Xylem and pith (b) Xylem and phloem (c) Phloem to epidermis (d) Phloem to pith Ans. b (42)
(a) More than phloem (b) Lesser than phloem (c) Equal in both (d) None of these Answer: (b) In phloem, concentration of carbohydrates is more. (16)
(a) Stomatal movements (b) Both water and food transport (c) Water transport (d) Food transport Ans. (a) Dry gum or pieces of agar-agar are placed in water, they swell and their volume increases. (11)
(a) Xylem vessels (b) Xylem tracheids (c) Sieve tubes (d) All the above Answer: C (11)
(a) All dead cells (b) Intercellular spaces (c) Cell wall spaces (d) All together Ans. (b) Meaning of diffusion is to flow out or to diffuse or to disperse or to extend in all directions. (24)
(a) Lenticels, wounds and breaks around branch roots (b) Roots and root hairs (c) Root cap (d) (a) and (c) both Ans. (b) Because the concentration of cytoplasm of pollen grains is high in comparison to dilute sugar solution or …
(a) Hadrom (b) Leptom (c) Bast (d) All the above Ans. (b) Because the concentration of cytoplasm of pollen grains is high in comparison to dilute sugar solution or water. (51)
(a) Such plants are acquired much of height (b) They have poorly developed or entirely absent root hairs (c) Their roots are much branched (d) All the above Ans. (b) In orchids, aerial roots are found which have velamen tissue, …
एक व्यक्ति 5 मिनट में 600 मीटर लंबी सड़क पार करता है। किमी प्रति घंटे में उसकी गति क्या है? ਇਕ ਵਿਅਕਤੀ 5 ਮਿੰਟ ਵਿਚ 600 ਮੀ. ਲੰਬੀ ਸੜਕ ਪਾਰ ਕਰਦਾ ਹੈ। ਕਿ.ਮੀ ਪ੍ਰਤੀ ਘੰਟੇ ਵਿਚ ਉਸ ਦੀ ਗਤੀ …
(a) Terminal portion of roots (b) Zone of cell elongation (c) Zone of cell formation (d) Zone of cell differentiation Ans. (d) Proteins are the strongest imbibants of water, starch less strong, cellulose being the weakest. That is why proteinaceous …
(a) Hydrophobic (b) Permeable (c) Semipermeable (d) Impermeable Ans. d (8)
(a) Black cotton soil (b) Sandy soil (c) Red soil (d) Ioamy soil Ans. (b) A variety of mineral elements is present in the soil but all of them are not essential for plant growth. Plants take in small quantity …
(a) Suction of water and minerals due to transpiration pull (b) Cyclosis in cell cytoplasm (c) Sugar transport in phloem (d) Distribution of hormones from one part to other (13)
(a) High temperature (b) ATP (c) Alkaline pH (d) Salts Answer: (b) Energy is usually provided by ATP or by concentration gradient of ions. (12)
(a) Wood parenchyma (b) Tracheids (c) Trachea (d) Wood fibre Answer: (a) Wood (xylem) parenchyma are the living parenchymatous cells. As found associated with xylem they are known as wood parenchyma. (16)
(a) Sieve tube (b) Companion cells (c) Bast parenchyma (d) All the above Answer: d) In phloem, sieve tube elements have thin cellulosic walls, companion cells and phloem parenchyma are simple thin walled parenchymatous cells except phloem fibres …
(a) Xylem (b) Phloem (c) Parenchyma (d) None of these Answer: (b) On removing the ring of bark, phloem and cambium are removed from stem. (7)
Exchange of substances between individual cells and their environments takes place by (a) Osmosis (b) Diffusion (c) Active transport (d) All of these Answer d (18)