IFS Botany: Questions 12 - 21 of 119

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Question number: 12

» Angiosperms » Applications of Palynology

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Comment upon the applied aspects of palynology. (Paper 1, Section B)

Explanation

Definition:

  • Palynology is the study of micro organic material such as spores, pollen, dinoflagellates and microfossils.

Applied aspects:

  • The distribution of spore genera and species in coal is an important tool to investigate stratigraphical problems like correlation of coal seams and oil fields.

  • It also helps in determining the age… (277 more words) …

Question number: 13

» Microbiology and Plant Pathology » Bacteria

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Describe the role of microbes in production of antibiotics. (Paper-1, Section-A)

Explanation

Definition

Antibiotics are the chemical substances that can inhibit the growth and destroy the microorganisms.

  • Antibiotics are chemicals that kill or inhibit the growth of bacteria and are used to treat bacterial infections.

  • Antibiotics are derived from microorganisms or living system through fermentation process.

  • Over 2, 500 years ago, Chinese… (190 more words) …

Question number: 14

» Cryptogams » Algae

Appeared in Year: 2015

Essay Question▾

Describe in Detail

With the help of labelled diagram, describe the reproductive organs of Chara. (Paper-1, Section-A)

Explanation

  • Chara is aquatic attached to muddy or sandy bottom of the pools, lakes, flowing streams and ponds of clear water.
  • In Chara, reproduction is takes place by vegetative and sexual method.

Vegetative reproduction:

Vegetative reproduction is takes place by three ways;

(1) By amylum stars: The cells of some subterranean… (491 more words) …

Question number: 15

» Microbiology and Plant Pathology » Fungal Toxins

Appeared in Year: 2015

Essay Question▾

Describe in Detail

What is the use of Bordeaux mixture? How is it prepared? (Paper-1, Section-A)

Explanation

Definition

  • Bordeaux mixture is a combination of copper sulfate, lime, and water.

  • Bordeaux mixture is an effective fungicide and bactericide that has been used for decades to control diseases of fruit and nut trees, vine fruits and ornamental plants.

  • Bordeaux mixture is an outstanding fungicide and bactericide for controlling some… (194 more words) …

Question number: 16

» Cryptogams » Pteridophytes

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Draw a well-labelled diagram through median LS of strobilus of Selaginella and discuss its main features. (Paper-1, Section-A)

Explanation

Knowing theLS of strobilus of Selaginella

Knowing theLS of Strobilus of Selaginella

What are the various parts of LS of strobilus of Selaginella

  • Selaginella is unique, however, from other lycophytes in that their strobili contain two different types of spores; megaspores and microspores.

  • There are two types of sporangia in Selaginella; Megasporangia and Microsporangia.

Megasporangia

  • Megasporangia… (130 more words) …

Question number: 17

» Cryptogams » Fungi

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Describe the asexual reproduction in Penicillium. (Paper-1, Section-A)

Explanation

  • Penicillium is saprophytic fungus and grows on vegetative fruits, meat and many other moist.

Asexual reproduction

  • In Penicillium, asexual reproduction takes place by conidia which are developed on conidiospores.

  • Conidia are non-motile and asexual spores.

  • Conidia are produce at the tip of special, erect, hyphae called conidiophores.

  • Many crops of… (145 more words) …

Question number: 18

» Cryptogams » Fungi

Appeared in Year: 2015

Essay Question▾

Describe in Detail

What is the significance of aflatoxins? (Paper-1, Section-A)

Explanation

Meaning of aflatoxins:

Aflatoxin is a toxin which is produced by mold and that can damage the liver and lead to the liver cancer.

Aflatoxin is a naturally occurring mycotoxin produced by two types of mold: Aspergillus flavus and Aspergillus parasiticus.

Aflatoxins are highly toxic compounds and can cause both… (130 more words) …

Question number: 19

» Phanerogams » Gymnosperms

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Draw the LS of Pinus seed (Paper-1, Section-A)

Explanation

Image showing Pinus seed L.S.

Image Showing Pinus Seed L. S.

Pinus is gymnosperms and it has a naked seed. After the gametophyte ovum is fertilized to become a zygote and the ovule becomes a seed.

Pinus is gymnosperms and it has a naked seed. After the gametophyte ovum is fertilized to become a zygote… (6 more words) …

Question number: 20

» Angiosperms » Pollination an Fertilization

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Explain what is parthenocarpy. (Paper 1, Section B)

Explanation

Definition:

  • 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 apparently… (344 more words) …

Question number: 21

» Microbiology and Plant Pathology » Viruses

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Explain the structure of TMV. (Paper-1, Section-A)

Explanation

Full name of TMV is Tobacco mosaic virus.

Structure

  • The structure of tobacco mosaic virus (TMV) is impossible to see with the human eye because it is very small, mainly 300 nanometers long.
  • The basic components of all viruses are as much as the same.
Various types of virus & its parts

Various Types of Virus &… (310 more words) …

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