Description : Read the following statements (A - E) and answer the question which follows them. (A) In liverworts, mosses and ferns gametophytes are free-living. (B) Gymnosperms and some ferns are heterosporous. (C) Sexual ... How many of the above statements are correct? (a) Three (b) Four (c) One (d) Two
Last Answer : (a) Three
Description : .Consider the following four statements whether they are correct or wrong. A. The sporophyte in liverworts is more elaborate than that in mosses. B. Salvinia is heterosporous. C. The life-cycle in all seed-bearing plants is diplontic ... are (a) A and C (b) A and D (c) B and C (d) A and B
Last Answer : (b) A and D
Description : Archegoniophores and antheridiophores are features of -Biology
Last Answer : answer:
Description : Which one of the following is a correct statement? (a) Pteridophyte gametophyte has a protonemal and leafy stage. (b) In gymnosperms, female gametophyte is free- living. (c) Antheridiophores and ... are present in pteridophytes. (d) Origin of seed habit can be traced in pteridophytes.
Last Answer : (d) Origin of seed habit can be traced in pteridophytes.
Description : 85. Which one of the following is a correct statement ? (1) Origin of seed habit can be traced in pteridophytes (2) Pteridophyte gametophyte has a protonemal and leafy stage (3) In gymnosperms female gametophyte is free-living (4) Antheridiophores and archegoniophores are present in pteridophytes
Last Answer : Origin of seed habit can be traced in pteridophytes
Description : Stomata in bryophytes are present in the of: (a) Capsule (b) Leaf (c) Stem (d) Seta
Last Answer : Ans. ((a))
Description : Select the mismatch. (a) Cycas – Dioecious (b) Salvinia – Heterosporous (c) Equisetum – Homosporous (d) Pinus – Dioecious
Last Answer : (d) Pinus – Dioecious
Description : Select the mismatch (1) Cycas – Dioecious (2) Salvinia – Heterosporous (3) Equisetum – Homosporous (4) Pinus – Dioecious
Last Answer : (4) Pinus – Dioecious
Description : Why the sporophyte of gymnosperm is heterosporous?
Last Answer : Ans: Sporophyte produces two types of spores like smaller micro spores and larger mega spores so it is heterosporous.
Description : Sporophyte of Marchantia. -Biology
Description : Selaginella and Salvinia are considered to represent a significant step toward evolution of seed habit because (a) female gametophyte is free and gets dispersed like seeds (b) female gametophyte ... by seed coat (d) embryo develops in female gametophyte which is retained on parent sporophyte.
Last Answer : (b) female gametophyte lacks archegonia
Description : Development of Sporophyte from gametophyte tissue without fusion of gametes is: (a) Apospory (b) Apogamy (c) Apomixis (d) Parthenogenesis
Last Answer : Ans. ((b))
Description : A fern differ from a moss in prossessing: (a) Swimming/flagellated anitherozoids (b) Flask-shaped archegonia (c) Independent Sporophyte (d) Independent gametophyte
Last Answer : Ans. ((c))
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 : Consider the following statements: (1) Cutin is a fatty acid polymer (2) Starch is a fatty acid polymer (3) Sucrose is monosaccharide (4) Maltose is polymer of fructose
Description : Consider the following statements: (1) The seed of pea is exalbuminous (2) The fruit of peach is drupe (3) The seed of tomato is albuminous (4) The fruit of coconut is berry
Description : Consider the following statements associated with the germination of an angiospermous seed: (1) As the seed gets hydrated and germinates, enzymatic activity is increased (2) The respiration ... The increase in the respiratory rate continues till senescence (4) Rate of enzymatic activity decreases
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 : Consider the following statements: The genetic code said to be degenerate and universal which means that, (1) Amino afids may have more than one codon (2) All amino acids have mo than one codon (3) Codons are common for higher and lower organism (4) Codons are not found in bacteria
Last Answer : Ans. ((d))
Description : Consider the following statements: (1) Cucurbits are monoecious plant (2) In mango, neuter, male and female and female flowers occur together (3) Legumenous plants how unisexuality (4) Oblique septa is found in Rosaceae
Description : In moss, the middle sterile part of capsule is called: (a) Foot (b) Protonema (c) Columella (d) Spore sac
Description : Which of the following statements is correct? (a) Ovules are not enclosed by ovary wall in gymnosperms. (b) Selaginella is heterosporous, while Salvinia is homosporous. (c) Horsetails are gymnosperms. (d) Stems are usually unbranched in both Cycas and Cedrus.
Last Answer : (a) Ovules are not enclosed by ovary wall in gymnosperms.
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 : Consider the following regions of India: (1) Eastern Himalaya (2) Eastern Ghats (3) Western Ghats (4) Western Himalaya
Description : Consider the following statement: The ex situ conservation of genetic resources can be done through: (1) Tissue culture practices (2) Maintenance of sanctuaries (3) The establishment of germplasm banks (4) The establishment of national parks
Description : Consider the following statement: (1) In plant cells, cytokinesis start with the formation of the phragmoplast (2) Phragmoplast comprises intrazonal microtubules and Golgi vesicles (3) Primary cell wall is produced by microtubules (4) Phragmoplast is formed by nucleus
Description : Read the following five statements (A - E) and answer as asked next to them. (A) In Equisetum, the female gametophyte is retained on the parent sporophyte. (B) In Ginkgo, male gametophyte is not independent. (C ... . How many of the above statements are correct? (a) Two (b) Three (c) Four (d) One
Last Answer : (d) One
Description : Read the following five statements (A to E) and select the option with all correct statements. A. Mosses and lichens are the first organisms to colonise a bare rock. B. Selaginella is a homosporous pteridophyte. C. Coralloid roots in Cycas ... D and E (b) B, C and E (c) A, C and D (d) B, C and D
Last Answer : (a) A, D and E
Description : All the following statements about epidermal growth factor are true except (A) It is a protein (B) It possess quaternary structure (C) Its receptor is made up of a single polypeptide chain (D) Its receptor possesses tyrosine kinase domain
Last Answer : Answer : B
Description : All the following statements about ceruloplasmin are correct except (A) It is a copper-containing protein (B) It possesses oxidase activity (C) It is synthesised in intestinal mucosa (D) Its plasma level is decreased inWilson’s disease
Last Answer : Answer : C
Description : Examples of heterosporous pteridophytes -Biology
Description : Difference between homosporous and heterosporous pteridophytes -Biology
Description : Select the correct statement. (a) Sequoia is one of the tallest trees. (b) The leaves of gymnosperms are not well adapted to extremes of climate. (c) Gymnosperms are both homosporous and heterosporous. (d) Salvinia, Ginkgo and Pinus all are gymnosperms.
Last Answer : (a) Sequoia is one of the tallest trees.
Description : Evolutionary important character of Selaginella is (a) heterosporous nature (b) rhizophore (c) strobili (d) ligule.
Last Answer : (a) heterosporous nature
Description : Which one of the following is heterosporous? (a) Adiantum (b) Equisetum (c) Dryopteris (d) Salvinia
Last Answer : (d) Salvinia
Description : Which of the following statement is correct ? (1) Ovules are not enclosed by ovary wall in gymnosperms (2) Selaginella is heterosporous, while Salvinia is homosporous (3) Horsetails are gymnosperms (4) Stems are usually unbranched in both Cycas and Cedrus
Last Answer : (1) Ovules are not enclosed by ovary wall in gymnosperms
Description : Distinguish between homosporous and heterosporous condition in pteridophytes.
Last Answer : Ans: Majority of pteridophytes are homosporous.All spores produced od similar type. Example: Psilotum Heterosporous pteridophytes produce macro and microspores. Example: Selaginella.
Description : Which one of the following statements is correct? (A) When the axes of rotation of the graduated circle and the verniers are not coincident, the instrument possesses eccentricity (B) The mean of the ... Vernier may be used if the readings of two verniers differ by a constant (D) All the above
Last Answer : (D) All the above
Description : Given the following statements with respect to linear programming problem: S1: The dual of the dual linear programming problem is again the primal problem S2: If either the primal or the dual problem has an unbounded objective function ... S1 and S2 (B) S1 and S3 (B) S2 and S3 (D) S1, S2 and S2
Last Answer : (D) S1, S2 and S2
Description : Are flatworms monoecious or dioecious?
Last Answer : There are monoecious hermaphrodite flatworms, like planarias and taenias, and there are dioecious (having male and female individuals) species too, like schistosomes.
Description : How is sex determined in dioecious plants?
Last Answer : Dioecious: Having male and female reproductive organs in separate plants or animals. More than 90 per cent of flowering plants produce perfect flowers that have both male and female ... and developed individuals secrete the pheromone so as to masculinise the surrounding juvenile plants.
Description : Maize belongs to the category : (A)Bisexual (B) Monoecious (C) Dioecious (D) None of these
Last Answer : (B) Monoecious
Description : The plants with male and female flowers on different plants are called (A)Dicot (B) Dichogamy (C) Dicliny (D) Dioecious
Last Answer : (D) Dioecious
Description : A good example of dioecious plant is a. Apricot b. Pear c. Plum d. Papaya
Last Answer : Papaya
Description : Dioecious, monocot fruit tree is: a. Banana b. Pomegranate c. Date palm d. Papaya
Last Answer : Date palm
Description : Which of the following vegetable has a dioecious behaviour: a. Onion b. Cabbage c. Bitter gourd d. Spinach
Last Answer : Bitter gourd
Description : Cross pollination is essential in following type of vegetables. a. Monoecious b. Dioecious c. Gynoecious d. Perigynous
Last Answer : Dioeciou
Description : A dioecious flowering plant prevents both (a) autogamy and geitonogamy (b) geitonogamy and xenogamy (c) cleistogamy and xenogamy (d) autogamy and xenogamy.
Last Answer : (a) autogamy and geitonogamy
Description : A dioecious flowering plant prevents both : (1) Autogamy and geitonogamy (2) Geitonogamy and xenogamy (3) Cleistogamy and xenogamy (4) Autogamy and xenogamy
Last Answer : (1) Autogamy and geitonogamy
Description : WHY ARE DATE PALMS REFFERED TO AS DIOECIOUS ?
Last Answer : ANS. BECAUSE THEY HAVE UNISEXUAL FLOWERS BORNE ON SEPARATE PLANTS.