(a) In the 17th century (b) In the 18th century (c) In the 19th century (d) In the early 20th century Answer: (b) In the 18th century Explanation: (b) (15)
(a) Diffusion (b) Imbibition (c) Endosmosis (d) Exosmosis (e) All of the above Ans.(b) In gram and wheat the volume increase by adsorption of water, in plant systems, adsorption of water takes place by cell wall. (35)
(a) Both protoplasm and cell wall act as a single layer (b) Only protoplast acts as a single layer (c) Only cell membrane acts as a single layer (d) None of the above Ans. c (14)
(a) Diffusion (b) Osmosis (c) Imbibition (d) All the above Ans. (c) Imbibition takes place by outermost layer of seed. (16)
(a) Cell to cell movement of water (b) Movement of water through cortical cells (c) Active absorption of water through roots (d) All the above Ans. d (12)
(a) Solutes (b) Solutions (c) Semipermeable membrane (d) Solvent Ans. (c) It is essential for operation of osmosis. In plant–water relations, biomembranes largely function as semipermeable membranes. (54)
(a) Willstatter and Stoll (b) Mayor and Anderson (c) Benson and Calvin (d) Robert Mayer Answer: (d) Robert Mayer Explanation: (d) Robert Mayer (1845) proposed that light has radiant …
(a) Melvin Calvin (b) Jean Senebie (c) Julius Robert Mayer (d) Pelletier Caventou Answer: (d) Pelletier Caventou Explanation: (d) Pelletier and Caventou (1818) discovered chlorophyll. It could be separated from leaf by boiling in alcohol (12)
(a) Decreases (b) Increases (c) Unchanged (d) None of these Ans. (b) In the course of imbibition the volume of the system increases i.e., swelling occurs. The total volume of the water imbibed plus the imbibing material is less after imbibition …
(a) Chromatography (b) Electrophorosis (c) Spectrophotometery (d) Histochemistry Answers: (a) Chromatography Explanation: (a) (31)
(a) Air (b) Derive form sea water (c) Use CO2 which is produced during their respiration only (d) Do not require CO2 at all Answer: (b) Derive form sea water Explanation: (b) (39)
(a) Ruben (b) Calvin (c) Emerson (d) Arnon Answer: (c) Emerson Explanation: (c) (19)
(a) Tropeolum (b) Impatiense balsamia (c) Tradescantia (d) All the above Ans. (c) Peel of Tradescantia leaf is generaly used for the demonstration of plasmolysis in laboratory. (20)
(a) Endosmosis (b) Exosmosis (c) Imbibition (d) Isotonic solution ans. (a) Concentration of cytoplasm of fish’s cells is higher. (13)
(a) Benson and associates (b) Rouhani and associates (c) Hatch and associates (d) Arnon and associates Answer: (b) Rouhani and associates Explanation: (b) (16)
. एक व्यक्ति ने विमान, ट्रेन और बस द्वारा कुल 1800 किमी की यात्रा की। उन्होंने पूरी यात्रा का एक तिहाई भाग विमान से पूरा किया और ट्रेन से तय की दूरी बस द्वारा तय की गई दूरी का तीन-पाँचवाँ …
(a) Permeable membrane (b) Impermeable membrane (c) Semipermeable membrane (d) None of these Ans. (c) Which allow all solvents but no solute to pass through are called semipermeable membranes, e.g., parchment paper.A (16)
(a) Hypotonic solution (b) Hypertonic solution (c) Isotonic solution (d) None of these Ans. b (16)
(a) Blackman (b) Hill (c) Ruben (d) Kalmen Answer: (a) Blackman Explanation: (a) Blackman propounded the law of limiting factors. He also proposed the occurrence of a dark phase in photosynthesis. (12)
(a) Permeable membrane (b) Impermeable membrane (c) Semipermeable membrane (d) None of these Ans. (c) Which allow all solvents but no solute to pass through are called semipermeable membranes, e.g., parchment paper.A (9)
अमित अपनी शुरुआत के बाद 4 किमी / घंटा और 4 घंटे की एक समान गति से चलता है, बृजेश उसके बाद 20 किमी / घंटा की समान दर से साइकिल चलाता है। शुरुआती बिंदु से कितनी दूर होगी जब …
(a) Pure protein (gelatin) (b) Fungal hyphae (c) Meristematic cells (d) All of them Ans. (d) Adsorption is the property of colloids and hence the materials which have high proportion of colloids, are good imbibants. (11)
जब कोई व्यक्ति अपनी गति को 42 किमी / घंटा से घटाकर 36 किमी / घंटा करता है तो वह 20 मिनट सामान्य समय अधिक लेता है उसके द्वारा लिया गया सामान्य समय ज्ञात कीजिए? ਜੇਕਰ ਇਕ ਵਿਅਕਤੀ ਆਪਣੀ ਗਤੀ …
A, B से दुगनी तेजी से दौड़ता है, B, C. से तीन गुना तेज दौड़ता है। C द्वारा 72 मिनट में दूरी,तय की जातीं है A द्वारा दूरी,तय कवर करने में कितना समय लगेगा? ਏ, ਬੀ ਤੋਂ ਦੋਗੁਣਾ ਅਤੇ ਬੀ …
(a) Distribution of water across the cells (b) Turgor of the guard cells (c) Resistance to the frost (d) All the above Ans. c (10)
(a) Growth of the young cells is brought about by osmotic pressure and turgor pressure of these cells (b) Certain turgor moments in plants are determined by osmosis (c) Both (a) and (b) (d) None of these Ans.c (20)
(a) Potato osmoscope (b) Ganong’s respiroscope (c) Microscope (d) All the above Ans. (a) Potato osmoscope experiment proves that osmosis occurs across plant membranes. (23)
(a) Plant remain normal (b) Plant show vigorous growth (c) Plant is permanently wilted (d) Plant undergoes temporary wilting Ans. (c) At permanent wilting percentage or co-efficient (PWC) the soil contains 1–15% water depending upon its texture (about 10% in …
(a) Xylem is blocked (b) Cambium is blocked (c) Phloem is blocked (d) Some roots are reduced in number Ans. (a) Xylem is responsible for transport of water. If xylem is blocked, plant …
(a) Turgidity (b) Field capacity (c) Water retaining power of the soil (d) Wilting coefficient Ans. (d) In wilting coefficient, the amount of water in soil which is causal factor of wilting. (18)
कार P, शहर X से शहर y की ओर शुरू होती है। कार Q, Y की ओर से X की ओर जाती है। दोनों कारें एक साथ शुरू होती हैं और समान गति से यात्रा के बाद अपनी बैठक को …
(a) Respiration (b) Photosynthesis (c) Absorption (d) Transpiration Ans. (d) Rapid transpiration causes mid-day leaf water deficit (temporary wilting). If such condition continues for sometime, permanent water deficit permanent wilting may develop, which causes injury to plants. (17)
(a) Due to temporary wilting (b) Permanent wilting (c) Both (a) and (b) (d) None of the above Ans. a (10)
(a) Hydrophilic surfaces (b) Hydrophobic surfaces (c) Lipophilic surfaces (d) All the above Ans. (a) Hydrophilic surface is water loving in nature (21)
(a) Protein (b) Cellulose (c) Both (a) and (b) (d) Minerals Ans. (c) A dry wooden piece when soaked in water shows considerable swelling and sometimes leads to considerable increase in volume, which is due to imbibition. (27)
(a) Osmosis (b) Root pressure (c) Capillary (d) Transpiration pull Ans. (a) Because cell wall of rhizoids and assimilatory filament cells work as semipermeable membrane. (8)
(a) Osmosis (b) Osmosis and imbibition (c) Imbibition alone (d) Diffusion Ans.(b) These are the processes in plants for uptake of water. (20)
(a) Absorption (b) Transpiration (c) Osmosis (d) None of the above Ans. (c) Hydration of solute molecules changes the solution concentration and osmosis is effected by concentration. (30)
(a) Endosmosis (b) Exosmosis (c) Plasmolysis (d) Imbibition Ans. (d) Breaking of the seed coat in germinating seeds is due to greater imbibitional swelling of the seed kernel (starch and protein) as compared to seed coverings. Seedling is able to come …
बसें बस टर्मिनल से 10 मिनट के अंतराल पर 20 किमी / घंटा की गति से शुरू होती हैं। 8 मिनट के अंतराल पर बसों के मिलने पर बस टर्मिनल की ओर विपरीत दिशा से आने वाले व्यक्ति की गति …