IFS (Forests Services) Botany (Mains): Questions 107 - 115 of 160

Access detailed explanations (illustrated with images and videos) to 160 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. Subscription can be renewed yearly absolutely FREE! View Sample Explanation or View Features.

Rs. 500.00 or

How to register?

Question number: 107

» Angiosperms » Asteraceae

Edit

Appeared in Year: 2013

Essay Question▾

Describe in Detail

Comment critically on the following: Advanced features of Asteraceae (Paper 1, Section B)

Explanation

  • Herbaceous nature of the majority taxa

  • Aggregation of flowers into heads or capitula with attractive ligulate florets and dense tubular disc florets

  • The capitula are surrounded by conspicuous involucral bracts

  • The construction of capitula enables a single visit of insect can help in pollinating several florets, there is no necessity fo

… (147 more words) …

Question number: 108

» Morphogenesis » Protoplast Culture

Edit

Appeared in Year: 2013

Essay Question▾

Describe in Detail

Write Short Notes on: Methods of protoplast fusion (Paper 1, Section B)

Explanation

Protoplast fusion is the joining of two plant cells together to form one cell with multiple nuclei.

There are two methods of Protoplast fusion; Spontaneous fusion and induced fusion.

Image showing protoplast fusion methods.

Image Showing Protoplast Fusion Methods.

There are mainly two types of method of protoplast fusion n further division is also seen in image.

Spontaneous Fusion:

… (449 more words) …

Question number: 109

» Angiosperms » Pollination an Fertilization

Edit

Appeared in Year: 2013

Essay Question▾

Describe in Detail

Comment on: Double fertilization and triple fertilization in Angiosperms (Paper 1, Section B)

Explanation

  • The process of double fertilization occurs in angiosperms (flowering plants).

  • In the process of double fertilization, out of the two sperm nucleus, one sperm nucleus fuses with the egg nucleus to form an embryo in process called syngamy and another male sperm nucleus fuses with polar nuclei to form endosperm in process is called triple fusi

… (400 more words) …

Question number: 110

» Angiosperms » Euphorbiaceae

Edit

Appeared in Year: 2013

Essay Question▾

Describe in Detail

Make a comparison of the following: Inflorescence of Apiaceae and Euphorbiaceae (Paper 1, Section B)

Explanation

Inflorescence of Apiaceae versus Inflorescence of Euphorbiaceae

Table showing the Inflorescence of Apiaceae versus Inflorescence of Euphorbiaceae

Inflorescence of Apiaceae

Inflorescence of Euphorbiaceae

Simple or compound umbel type of inflorescence is found in Apiaceae family.

Cyathium type of inflorescence is found in Euphorbiaceae family.

… (112 more words) …

Question number: 111

» Microbiology and Plant Pathology » Major Plant Diseases

Edit

Appeared in Year: 2013

Essay Question▾

Describe in Detail

Discuss briefly the following: Causal organisms, symptoms and control of wheat rusts in India (Paper 1, Section A)

Explanation

Three types of wheat rusts are known and all of them frequently occur in India.

  1. Black or stem rust

  2. Orange – Brown rust

  3. Yellow stripe rust

Black or stem rust:

Causal organism: Puccinia graminis tritici

Symptoms:

  • Symptoms are produced on almost all aerial parts of the wheat plant but are most common on stem, leaf sheaths and upper a

… (458 more words) …

Question number: 112

» Microbiology and Plant Pathology » Major Plant Diseases

Edit

Appeared in Year: 2013

Essay Question▾

Describe in Detail

Discuss briefly the following: Dissemination of pathogens by insects (Paper 1, Section A)

Explanation

  • Since the discovery by Waite that bees and wasps can transmit bacteria causing fire blight of apple and pear, Erwinia amylovora, much information has been accumulated on the role of insects and other small animals in the dissemination of plant-pathogenic viruses, bacteria and fungi.

  • Many small animals help in the dissemination of some patho

… (175 more words) …

Question number: 113

» Cryptogams » Bryophytes

Edit

Appeared in Year: 2013

Essay Question▾

Describe in Detail

Discuss briefly the following: Economic importance and distribution of Bryophytes (Paper 1, Section A)

Explanation

Economic importance of Bryophytes:

  • Protection from soil erosion: Bryophytes, especially mosses, form dense mats over the soil and prevent soil erosion by running water.

  • Soil formation: Mosses are an important link in plant succession on rocky areas. They take part in binding soil in rock crevices formed by lichens. Growth of Sphagnum ultim

… (369 more words) …

Question number: 114

» Angiosperms » Systematics

Edit

Appeared in Year: 2013

One Liner Question▾

Write in Brief

Write the botanical name, family and part used of each of the following: Jasmine (Paper 1, Section B)

Question number: 115

» Phanerogams » Cycadales

Edit

Appeared in Year: 2013

Short Answer Question▾

Write in Short

Draw scientifically accurate diagrams of the following and label the parts: T. S. of coralloid root of Cycas (Paper 1, Section B)