IFS (Forest Services) Botany: Questions 20 - 27 of 1252
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Question 20
Appeared in Year: 2015
Describe in Detail Subjective▾
Explain what is parthenocarpy. (Paper 1, Section B)
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Parthenocarpy
- Parthenocarpy is the production of fruit without fertilization of an egg in the ovary.
- In botany and in horticulture, parthenocarpy means virgin fruits mean it is naturally or artificially induced fruit production without the fertilization of ovules.
- The fruit produced by parthenocarpy is seedless.
- Stenospermocarpy may also produce appare…
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Question 21
Appeared in Year: 2015
Describe in Detail Subjective▾
Explain the structure of TMV. (Paper-1, Section-A)
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Structure of TMV
- Full name of TMV is Tobacco mosaic virus.
- The structure of tobacco mosaic virus (TMV) is impossible to see with the human eye because it is very small, mainly 300 nano-meters long.
- The basic components of all viruses are as much as the same.
- Nucleic acid genome and a protein capsid that covers the geno…
… (249 more words, 25 figures) …
Question 22
Appeared in Year: 2015
Describe in Detail Subjective▾
Write short notes on the following: Protoplast fusion (Paper 1, Section B)
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Protoplast Fusion
Protoplast fusion is a technique by which two protoplasts are fused to form hybrid cells that can grow into mature hybrid organisms.
Methods of Protoplast Fusion
Spontaneous Fusion
- Protoplasts during isolation often fuse spontaneously and this phenomenon is called spontaneous fusion.
- Simply …
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Question 23
Appeared in Year: 2015
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Give the salient features of Engler and Prantl՚s system of classification and compare it with that of Bentham and Hooker՚s system of classification.
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Salient Features of Engler and Prantl՚s System
- Monochlamydeous is completely put an end to and families are distributed in the large series called Archichlamydeae.
- This Engler system dominates over all the natural system but not to the rejection of other.
- They accept the theory of descends and threw light or the phylogeny of various groups.
- It traces u…
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Question 24
Appeared in Year: 2015
Describe in Detail Subjective▾
How are the fungal toxins classified according to their source of origin? (Paper-1, Section-A)
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Defining Toxins
- Toxins are harmful products, which are produced by living organisms, bacteria plants or animals.
- A toxin is a product of microorganism or of a microorganism host complex, which acts on living host protoplast to influence disease development or symptoms.
- Toxins is an injurious substances produced by organisms.
Types of Toxins
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Question 25
Appeared in Year: 2015
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With the help of suitable diagrams, describe the development of sporophyte in bryophytes. (Paper-1, Section-A)
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Sporophyte in Bryophytes
- A sporophyte is created by sexual reproduction of the gametophyte generation.
- Gametophytes make haploid unicellular gametes, or sperm and eggs.
- When a sperm cell fuses with an egg cell, this is called fertilization.
- It creates a unicellular diploid zygote.
- This zygote undergoes many rounds …
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Question 26
Appeared in Year: 2015
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What are the various methods of genetic recombination in bacteria? (Paper-1, Section-A)
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Genetic Recombination
- Genetic recombination is a process where genetic materials, contained in two separate genomes, are brought together within one unit.
- Genetic recombination is when genes from two different sources are combined to form a new genetic combination.
Recombination Takes Place by Three Methods
- Transformation
- Transduction
- Conjugation
Transfor…
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Question 27
Appeared in Year: 2015
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Write down the botanical names and the uses of the plants of economic importance belonging to the family Cucurbitaceae. (Paper 1, Section B)
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Family Cucurbitaceae
- Mainly all Cucurbitaceae family plants are economically important as vegetables used in kitchen, some plants have medicinal value and hard dried shells are used to form flasks as vessels and utensils.
- It also used as blowpipe of snake charmer, drum for tambura, soraja etc. in making musical instrument.
- Some plants are economically…
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