Hormogonia are vegetative reproductive structure of: (a) Spirogyra (b) Ulothrix (c) Oscillatoria (d) Yeast

Hormogonia are vegetative reproductive structure of: (a) Spirogyra (b) Ulothrix (c) Oscillatoria (d) Yeast
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Hormogonia are the vegetative reproductive structures of (a) Chlamydomonas (b) Spirogyra (c) Oscillatoria (d) Ulothrix

Description : Hormogonia are the vegetative reproductive structures of (a) Chlamydomonas (b) Spirogyra (c) Oscillatoria (d) Ulothrix

Last Answer : Ans. ((c))

In Ulothrix/Spirogyra, reduction division (meiosis) occurs at the time of (a) gamete formation (b) zoospore formation (c) zygospore germination (d) vegetative reproduction.

Description : In Ulothrix/Spirogyra, reduction division (meiosis) occurs at the time of (a) gamete formation (b) zoospore formation (c) zygospore germination (d) vegetative reproduction.

Last Answer : (c) zygospore germination

Which one of the following is commonly known as Pond Silk'? (1) Spirogyra (2) Rhizopus (3) Yeast (4) Ulothrix

Description : Which one of the following is commonly known as Pond Silk'? (1) Spirogyra (2) Rhizopus (3) Yeast (4) Ulothrix

Last Answer : (1) Spirogyra Explanation: Pond silk is the common name of Spirogyra (algae) because it is very slimy in shape. It is also known as pond silk, water silk, pond scum or mermaid's trees because of its bright green silky appearance. Its filaments shine like silk due to the presence of mucilage.

Which one of the following is commonly known as ‘Pond Silk’? (1) Spirogyra (2) Rhizopus (3) Yeast (4) Ulothrix

Description : Which one of the following is commonly known as ‘Pond Silk’? (1) Spirogyra (2) Rhizopus (3) Yeast (4) Ulothrix

Last Answer : Spirogyra

Columella is a specialized structure found in the sporangium of (a) Spirogyra (b) Ulothrix (c) Rhizopus (d) none of these.

Description : Columella is a specialized structure found in the sporangium of (a) Spirogyra (b) Ulothrix (c) Rhizopus (d) none of these.

Last Answer : (c) Rhizopus

An alga which can be employed as food for human being is (a) Ulothrix (b) Chlorella (c) Spirogyra (d) Polysiphonia.

Description : An alga which can be employed as food for human being is (a) Ulothrix (b) Chlorella (c) Spirogyra (d) Polysiphonia.

Last Answer : (b) Chlorella

The sexual reproduction is absent in (a) Spirogyra (b) Nostoc (c) Ulothrix (d) Volvox.

Description : The sexual reproduction is absent in (a) Spirogyra (b) Nostoc (c) Ulothrix (d) Volvox.

Last Answer : b) Nostoc

An alga, very rich in protein, is (a) Chlorella (b) Nostoc (c) Spirogyra (d) Ulothrix.

Description : An alga, very rich in protein, is (a) Chlorella (b) Nostoc (c) Spirogyra (d) Ulothrix.

Last Answer : (a) Chlorella

Which one of the following shows isogamy with non-flagellated gametes? (a) Sargassum (b) Ectocarpus (c) Ulothrix (d) Spirogyra

Description : Which one of the following shows isogamy with non-flagellated gametes? (a) Sargassum (b) Ectocarpus (c) Ulothrix (d) Spirogyra

Last Answer : (d) Spirogyra

An example of colonial alga is (a) Volvox (b) Ulothrix (c) Spirogyra (d) Chlorella

Description : An example of colonial alga is (a) Volvox (b) Ulothrix (c) Spirogyra (d) Chlorella

Last Answer : (a) Volvox

An example of colonial alga is : (1) Volvox (2) Ulothrix (3) Spirogyra (4) Chlorella

Description : An example of colonial alga is : (1) Volvox (2) Ulothrix (3) Spirogyra (4) Chlorella

Last Answer : (1) Volvox

Formation of diploid embryosac from diploid vegetative structure, e.g., nucellus or integument etc., without meiosis is called: (a) Apospory (b) Apomixis (c) Diplospory (d) Adventives polyembryony

Description : Formation of diploid embryosac from diploid vegetative structure, e.g., nucellus or integument etc., without meiosis is called: (a) Apospory (b) Apomixis (c) Diplospory (d) Adventives polyembryony

Last Answer : Ans. ((a))

Which one of the following is the earliest land plant? (a) Rhynia (b) Cycas (c) Ulothrix (d) Synchytrium

Description : Which one of the following is the earliest land plant? (a) Rhynia (b) Cycas (c) Ulothrix (d) Synchytrium

Last Answer : Ans. ((a))

Sporocarp is a reproductive structure of (a) Some algae (b) Some aquatic ferns (c) Angiosperms having spores (d) Bryophytes

Description : Sporocarp is a reproductive structure of (a) Some algae (b) Some aquatic ferns (c) Angiosperms having spores (d) Bryophytes

Last Answer : Ans. ((b))

Which of the following pairs are correctly matched? (1) Fertile spike —Ophioglossum (2) Sporangiophore—Equisetum (3) Synangium—Psilotum (4) Apophysis—Spirogyra

Description : Which of the following pairs are correctly matched? (1) Fertile spike —Ophioglossum (2) Sporangiophore—Equisetum (3) Synangium—Psilotum (4) Apophysis—Spirogyra

Last Answer : Ans. ((a))

Ulothrix can be described as a (a) filamentous alga lacking flagellated reproductive stages (b) membranous alga producing zoospores (c) filamentous alga with flagellated reproductive stages (d) non-motile colonial alga lacking zoospores.

Description : Ulothrix can be described as a (a) filamentous alga lacking flagellated reproductive stages (b) membranous alga producing zoospores (c) filamentous alga with flagellated reproductive stages (d) non-motile colonial alga lacking zoospores.

Last Answer : (c) filamentous alga with flagellated reproductive stages

Vegetative propagation in mint occurs by:a) Rhizomeb) Suckerc) Runnerd) Offset

Description : Vegetative propagation in mint occurs by:a) Rhizomeb) Suckerc) Runnerd) Offset

Last Answer : b) Sucker

Vegetative propagation is an example of

Description : Vegetative propagation is an example of 

Last Answer : Vegetative propagation is an example of – Recurrent apomixis

Write short notes on leaves that help in vegetative reproduction

Description : Write short notes on leaves that help in vegetative reproduction

Last Answer : Ans: Leaves which have epiphyllous buds help in vegetative reproduction. Such leaves are called as reproductive leaves. In Bryophyllum, notches of leaf margins have epiphyllous buds which upon shedding strike ... buds arise at the leaf tip and in Begonia from the wounded regions of leaf.  

Name the sub-aerial stem modification seen in free floating aquatic plants. How does it help in vegetative propagation?

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.  

Which aerial stem modification is concerned with vegetative propagation? Give two examples.

Description : Which aerial stem modification is concerned with vegetative propagation? Give two examples. 

Last Answer : Ans: Bulbils. Ex: Agave americana, Dioscoria bulbifera 

Who recognized the importance of floral characters in Taxonomy? Why are floral characters more useful than vegetative characters in classification?

Description : Who recognized the importance of floral characters in Taxonomy? Why are floral characters more useful than vegetative characters in classification? 

Last Answer : Ans: Linnaeus. Floral characters show more variations and more stable than vegetative characters. 

Advantages of Artificial Methods of Vegetative Reproduction include a) Crops with better quality b) Crops with more yield c) Ability to produce plants with desirable qualities d) All of these

Description : Advantages of Artificial Methods of Vegetative Reproduction include a) Crops with better quality b) Crops with more yield c) Ability to produce plants with desirable qualities d) All of these 

Last Answer : c) Ability to produce plants with desirable qualities 

Artificial methods of vegetative propagation includes a) Cloning b) grafting c) cuttings d) both b and cn

Description : Artificial methods of vegetative propagation includes a) Cloning b) grafting c) cuttings d) both b and cn

Last Answer :  d) both b and cnswe

Considering corms of natural vegetative propagation, buds are present at a) Front side of corm b) Backside of corm c) Top of corm d) End of corm

Description : Considering corms of natural vegetative propagation, buds are present at a) Front side of corm b) Backside of corm c) Top of corm d) End of corm

Last Answer : c) Top of corm

Example of natural vegetative propagation does not include a) Corals b) bulbs c) corms d) rhizomes

Description : Example of natural vegetative propagation does not include a) Corals b) bulbs c) corms d) rhizomes

Last Answer : a) Corals

Example of plant in which vegetative propagation is occurred by leaves is called a) Cannabisn b) Chrysanthemum c) Cryophyllum d) Brassica

Description : Example of plant in which vegetative propagation is occurred by leaves is called a) Cannabisn b) Chrysanthemum c) Cryophyllum d) Brassica

Last Answer : c) Cryophyllum

In cutting method of vegetative propagation, cuttings are mainly taken from a) Leaves of parent plant b) Roots or stems of parent plant c) Shoots of parent plant d) Buds of parent plant

Description : In cutting method of vegetative propagation, cuttings are mainly taken from a) Leaves of parent plant b) Roots or stems of parent plant c) Shoots of parent plant d) Buds of parent plant

Last Answer : b) Roots or stems of parent plant

External agencies are not required in a) natural vegetative propagation b) sexual reproduction c) bisexual reproduction d) trisexual reproduction

Description : External agencies are not required in a) natural vegetative propagation b) sexual reproduction c) bisexual reproduction d) trisexual reproduction

Last Answer : a) natural vegetative propagation

Disadvantages of natural vegetative propagation includes a) lack of dispersal mechanisms b) no fertilization is involved c) area is quickly colonized d) daughter plants can grow quickly

Description : Disadvantages of natural vegetative propagation includes a) lack of dispersal mechanisms b) no fertilization is involved c) area is quickly colonized d) daughter plants can grow quickly

Last Answer : a) lack of dispersal mechanisms

What is the name of the reproductive organ ?

Description : What is the name of the reproductive organ ?

Last Answer : Stolon is the name of the reproductive organ.

Mary’s biological concept of species is mainly based on: (a) Morphological traits (b) Reproductive isolation (c) Modes of reproduction (d) Morphology and reproduction

Description : Mary’s biological concept of species is mainly based on: (a) Morphological traits (b) Reproductive isolation (c) Modes of reproduction (d) Morphology and reproduction

Last Answer : Ans. ((b))

Ergot is obtained from: (a) Albugo (b) Yeast (c) Claviceps Purpurea (d) Alternaria

Description : Ergot is obtained from: (a) Albugo (b) Yeast (c) Claviceps Purpurea (d) Alternaria

Last Answer : Ans. ((c))

Golgi apparatus is absent in (a) Higher plants (b) Yeast (c) Bacteria and blue-green algae (d) Liver cells

Description : Golgi apparatus is absent in (a) Higher plants (b) Yeast (c) Bacteria and blue-green algae (d) Liver cells

Last Answer : Ans. ((c))

Nitrogen in vegetables is needed for a. Vegetative growth b. Ripening /maturity c. Reproductive growth d. None of these

Description : Nitrogen in vegetables is needed for a. Vegetative growth b. Ripening /maturity c. Reproductive growth d. None of these

Last Answer : Vegetative growth

Floral features are chiefly used in angiosperm identification because (a) flowers can be safely pressed (b) reproductive parts are more stable and conservative than vegetative parts (c) flowers are nice to work with (d) flowers are of various colours.

Description : Floral features are chiefly used in angiosperm identification because (a) flowers can be safely pressed (b) reproductive parts are more stable and conservative than vegetative parts (c) flowers are nice to work with (d) flowers are of various colours.

Last Answer : (b) reproductive parts are more stable and conservative than vegetative parts

Auxospores and hormogonia are formed, respectively, by (a) some diatoms and several cyanobacteria (b) some cyanobacteria and many diatoms (c) several cyanobacteria and several diatoms (d) several diatoms and a few cyanobacteria.

Description : Auxospores and hormogonia are formed, respectively, by (a) some diatoms and several cyanobacteria (b) some cyanobacteria and many diatoms (c) several cyanobacteria and several diatoms (d) several diatoms and a few cyanobacteria.

Last Answer : (d) several diatoms and a few cyanobacteria.

What is the structure of sclerenchyma tissue ?

Description : What is the structure of sclerenchyma tissue ?

Last Answer : The cells of this tissue are hard , very long and have thick walls. Tissue is protoplasm -free , lignin-containing, and is specifically for mechanical work. Although protoplasm is present in the ... very thick and ligninous. Mature scleroid cells are usually dead. The cell wall is well-contained.

In onion, the swollen underground structure is: (a) Root (b) Rhizome (c) Bulb (d) Tuber

Description : In onion, the swollen underground structure is: (a) Root (b) Rhizome (c) Bulb (d) Tuber

Last Answer : Ans. ((c))

Give an account on the structure and function of tRNA

Description : Give an account on the structure and function of tRNA  

Last Answer : Ans: Transfer RNA is the smallest among the RNAs. It is also known as adaptor RNA or decoding RNA or soluble RNA. It accounts for 10 - 15% of total cellular RNA. It consists of 80 - 90 ... significance. tRNA brings the aminoacids to the surface of ribosomes at the time of protein synthesis. 

Describe the structure of ovule with the help of neat labeled diagram

Description : Describe the structure of ovule with the help of neat labeled diagram

Last Answer : Ans: Ovules are seen in flowering plants. In Gymnosperms they are exposed and in angiosperms they are enclosed.   Typical ovule has a stalk known as Funiculus and ovule body. ... as in Monocots and Polypetalae and ategmic without integuments as in parasites such as Balanophora, Loranthus.  

Describe the structure of anther with the help of a neat diagram

Description : Describe the structure of anther with the help of a neat diagram 

Last Answer : Ans: Structure of anther is clearly understood in the transverse section of anther. In the T.S. of a dithecous anther the two thecae are joined by connective consisting of sterile ... later separate from each other and liberated individually. Individual microspores are called as pollen grains. 

Which one of the following is not used in organic farming? (a) Glomus (b) Earthworm (c) Oscillatoria (d) Snail

Description : Which one of the following is not used in organic farming? (a) Glomus (b) Earthworm (c) Oscillatoria (d) Snail

Last Answer : d) Snail

The common nitrogen-fixer in paddy fields is (a) Rhizobium (b) Azospirillum (c) Oscillatoria (d) Frankia.

Description : The common nitrogen-fixer in paddy fields is (a) Rhizobium (b) Azospirillum (c) Oscillatoria (d) Frankia.

Last Answer : (b) Azospirillum

Select the correct group of biocontrol agents. (a) Nostoc, Azospirillium, Nucleopolyhedrovirus (b) Bacillus thuringiensis, Tobacco mosaic virus, Aphids (c) Trichoderma, Baculovirus, Bacillus thuringiensis (d) Oscillatoria, Rhizobium, Trichoderma

Description : Select the correct group of biocontrol agents. (a) Nostoc, Azospirillium, Nucleopolyhedrovirus (b) Bacillus thuringiensis, Tobacco mosaic virus, Aphids (c) Trichoderma, Baculovirus, Bacillus thuringiensis (d) Oscillatoria, Rhizobium, Trichoderma

Last Answer : (c) Trichoderma, Baculovirus, Bacillus thuringiensis

Oxygenic photosynthesis occurs in (a) Oscillatoria (b) Rhodospirillum (c) Chlorobium (d) Chromatium.

Description : Oxygenic photosynthesis occurs in (a) Oscillatoria (b) Rhodospirillum (c) Chlorobium (d) Chromatium.

Last Answer : (a) Oscillatoria

Which among the following is not a prokaryote? (a) Saccharomyces (b) Mycobacterium (c) Nostoc (d) Oscillatoria

Description : Which among the following is not a prokaryote? (a) Saccharomyces (b) Mycobacterium (c) Nostoc (d) Oscillatoria

Last Answer : (a) Saccharomyces

Which among the following is not a prokaryote ? (1) Saccharomyces (2) Mycobacterium (3) Nostoc (4) Oscillatoria

Description : Which among the following is not a prokaryote ? (1) Saccharomyces (2) Mycobacterium (3) Nostoc (4) Oscillatoria

Last Answer : (1) Saccharomyces

Which of the following is an example of parasitic alga? (1) Ulothrix (2) Cephaleuros (3) Oedogonium (4) Sargassum

Description : Which of the following is an example of parasitic alga? (1) Ulothrix (2) Cephaleuros (3) Oedogonium (4) Sargassum

Last Answer : (2) Cephaleuros Explanation: Cephaleuros is a genus of parasitic thalloid algae comprising approximately 14 species. Its common name is red rust. The alga is parasitic on tea, coffee, mango and guava causing damage limited to the area of algal growth on leaves.

Ulothrix filaments produce (a) heterogametes (b) basidiospores (c) isogametes (d) anisogametes

Description : Ulothrix filaments produce (a) heterogametes (b) basidiospores (c) isogametes (d) anisogametes

Last Answer : (c) isogametes