Description : Consider the following statements: Marchantia polymorpha (1) Is dioecious (2) Possesses antheridiophores and archegoniophores (3) Lacks foot and seta in its sporophyte (4) Is heterosporous
Last Answer : Ans. ((b))
Description : What is stomata ?
Last Answer : There are many small holes on the surface of the leaves of the tree , these are called stomata.
Description : Sporocarp is a reproductive structure of (a) Some algae (b) Some aquatic ferns (c) Angiosperms having spores (d) Bryophytes
Description : Double fertilization is found in: (a) Bryophytes (b) Angiosperms (c) Gymnosperms (d) Pteridophytes
Description : In Caryophyllaceae the stomata are
Last Answer : In Caryophyllaceae the stomata are – Diacytic
Description : Classification of stomata was first given by
Last Answer : Classification of stomata was first given by – Metcalfe and Chalk (1950)
Description : Whent the subsidiary or neighboring cells have a common origin with the guard cells such type of stomata ontogeny is called as –
Last Answer : Whent the subsidiary or neighboring cells have a common origin with the guard cells such type of stomata ontogeny is called as – Mesogenous development
Description : Dumbell shaped stomata are found in
Last Answer : Dumbell shaped stomata are found in – Members of family Poaceae
Description : Stomata are absent in family
Last Answer : Stomata are absent in family – Balanophoraceae
Description : In spite of several angiospermic features Gnetum is a gymnosperm because…. a) polyembryony is a common features b) prothallial cell is present in the male gametophyte c) seed is naked d) stem exhibit anomalous secondary growth
Last Answer : c) seed is naked
Description : In moss, the middle sterile part of capsule is called: (a) Foot (b) Protonema (c) Columella (d) Spore sac
Last Answer : Ans. ((c))
Description : Stomata that is present on only under surface of leaf.
Last Answer : Ans. Apple and Mulberry type
Description : Stem tailed drill seen in which plant ?
Last Answer : : Stem tailed drill is found in bone marrow plants.
Description : What are the totiptent stem cells of plants ?
Last Answer : : Totiptent stem is the type of cell from which it is possible to produce plant seedlings directly.
Description : Arrangement of leaves on a stem branch is: (a) Venation (b) Venation (c) Ptyxis (d) Phyllotaxy
Last Answer : Ans. ((d))
Description : Aerosols having carbon and fluorine compounds are chiefly released by: (a) Refineries (b) Automobiles (c) Industries (d) Jets 3. Coir of commerce is obtained from: (a) Endocarp of coconut (b) Mesocarp of coconut (c) Stem of jute (d) Leaves of coconut
Description : Stem is reduced in (a) Rhizome (b) Corm (c) Bulb (d) Tuber
Description : The resin duct in Pinus stem represents a................ a)large vacuole b)intercellular space c)lysigenous cavity d)schizogenous cavity.
Last Answer : d)schizogenous cavity.
Description : Sphenopteris hoeninghausii is the….. a)stem b)root c)leaves d)ovule
Last Answer : c)leaves
Description : Name the sub-aerial stem modification seen in free floating aquatic plants. How does it help in vegetative propagation?
Last Answer : Ans: Off-set is the sub-aerial modified stem seen in free floating hydrophytes. It is brittle and has leaves and roots at its only node. When broken accidentally, it is separated from parent plant and can lead independent life.
Description : Which aerial stem modification is concerned with vegetative propagation? Give two examples.
Last Answer : Ans: Bulbils. Ex: Agave americana, Dioscoria bulbifera
Description : Which underground stem modification does not possess roots? Mention its scientific name.
Last Answer : Ans: Stem tuber is the underground stem modification that does not possess roots. Solanum tuberosum is its scientific name.
Description : Banana is propagated by a) Stem cutting b) Tillers c) Suckers d) Crown
Last Answer : c) Suckers
Description : A common example of stem tuber is a) Ginger b) Garlic c) Onion d) Potato
Last Answer : d) Potato
Description : Onion and garlic are examples of a)Rhizome b) corm c) stem tuber d) bulb
Last Answer : d) bulb
Description : Tissue culture is a good technique to a) Cross two varieties b) Rapidly increase the size of a trees by strengthening the stem c) Eliminate virus d) Improve yield of crops
Last Answer : c) Eliminate virus
Description : What is a thorn leaf ?
Last Answer : : When a leaf is cut, it is called a thorn leaf. E.g .: lemon.
Description : In angiosperm, triple fusion is necessary for the formation of: (a) Embryo (b) Pollen (c) Endosperm (d) Leaf
Description : Water potential in leaf tissue is “positive” (near zero) during: (a) Low transpiration (b) Excessive absorption (c) Excessive transpiration (d) Gestation
Description : Abscission layer developed during leaf fall is made of: (a) Cork cells (b) Sclerenchymatous cells (c) Sclerenchymatous cells (d) Parenchymatous cells
Description : The specific characters of C4 plant is: (a) Bulliform cells (b) Kranz anatomy (c) Parallel venation (d) Isobilateral leaf
Description : Haploid plants can be obtained from: (a) Leaf culture (b) Bud culture (c) Root culture (d) Anther culture
Description : Which Pollutant causes leaf curling a) CO b) H2S c) O3 d) SO2
Last Answer : d) SO2
Description : Which of the following structures is involved in gaseous exchange in woody stem of a plant? (a) Stomata (b) Lenticel (c) Hydathode (d) Epidermis
Last Answer : (b) Lenticel
Description : Examine the given figure and select the correct option giving all the four parts (A, B, C and D) rightly identified. A B C D (a) Archego- Female Gemma Rhizoids niophore thallus cup ( ... thallus (c) Seta Sporo- Proto- Rhizoids phyte nema (d) Antherid- Male- Globule Roots iophore thallus
Last Answer : (a) Archego- Female Gemma Rhizoids niophore thallus cup
Description : Serial port interrupt is generated, if ____ bits are seta) IE b) RI, IE c) IP, TI d) RI, TI
Last Answer : d) RI, TI
Description : In most plants stomata on a leaf must be during open the Calvin-Benson cycle.?
Last Answer : Need answer
Description : Leaves of many grasses are capable of folding and unfolding because (1) their mesophyll is not differentiated into palisade and spongy parenchyma (2) they have stomata on both sides of the leaf (3) they have high levels of silica (4) they have specialised bulliform cells
Last Answer : (4) they have specialised bulli-form cells Explanation: Bulliform cells are large, bubbleshaped epidermal cells that occur in groups on the upper surface of the leaves of many grasses. These cells, by their turgor changes, cause rolling and unrolling of the leaves thus regulating water loss.
Description : Stomata in grass leaf are (a) dumb-bell shaped (b) kidney-shaped (c) rectangular (d) barrel-shaped.
Last Answer : (a) dumb-bell shaped
Description : List the steps of preparation of temporary mount of a leaf peel to observe stomata.
Last Answer : Answer. The steps are: i. Removal of peel from leaf. ii. Stain with safranin. iii. Put the stained peel on a clean slide. iv. Mount it with glycerine and cover slip.
Description : Stomata in grass leaf are (1) Dumb-bell shaped (2) Kidney shaped (3) Rectangular (4) Barrel shaped
Last Answer : (1) Dumb-bell shaped
Last Answer : they have specialised bulliform cells
Description : In plants auxin are mainly present in: a. Root tips b. Stem end c. Shoot tips d. Leaf margins
Last Answer : Shoot tips
Description : Consider the following statements: (1) Copper is present in cytochrome oxidane (2) Pantothenic acid is precursor of co-enzyme-A (3) Thiamine prohosphate is the prosthetic group in decarboxylases (4) Zinc is present in RNA and DNA polymerases
Description : In the bacteria: (1) Mesosome is present (2) Nucleoid represents the genome (3) Ribosomes are found in cytoplasm (4) Histone proteins complexed with DNA
Last Answer : Ans. ((a))
Description : Air spaces are present in (a) Hydrophytes (b) Xerophytes (c) Mesophytes (d) Al1these
Description : What tissue present in leaves of Pinus conducts food and water laterally? (a) Transfusion tissue (b) Phloem (c) Xylem (d) Medullary rays
Description : Select the correct statement: (a) Legumes are incapable of fixing nitrogen (b) Legumes fix nitrogen through bacteria living in fruits root (c) Legumes fix nitrogen only by bacteria present in nodules (d) None of the above
Last Answer : Ans. (c)
Description : Feather stigma is present in: (a) Pea (b) Hibiscus (c) Wheat (d) Poppy
Description : The pollination between two different flowers present on same plant is called as
Last Answer : The pollination between two different flowers present on same plant is called as – Geitonogamy