IFS (Forests Services) Botany (Mains): Questions 146 - 155 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: 146

» Cryptogams » Pteridophytes

Edit

Appeared in Year: 2014

Essay Question▾

Describe in Detail

What are the xerophytic and hydrophytes characters found in the Rhizome anatomy of Equisetum?

Explanation

  • The sporophyte of equisetum is divided into three part stem, root, and leaves.

  • The main stem is underground creeping and perennial rhizome. That is differentiated into nodes and internodes.

Xerophytic character

  • Presence of ridges and grooves.

  • The outer and radial walls of epidermal cells are impregnated with silica.

  • Presence o

… (98 more words) …

Question number: 147

» Cryptogams » Bryophytes

» Cryptogams » Pteridophytes

Edit

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Write notes on the distribution of bryophytes and pteridophytes in deciduous and evergreen forests of india.

Explanation

In india most of the land is covered with evergreen or decicious forest. hence in most of the area bryophytes and teridophytes are found.

Distribution of pteridophytes

  • Variable climate and altitude variantion and dur to this evergreen forest and decidious forest are foun all over the sub contimuette of india.

  • These forest are found in him

… (492 more words) …

Question number: 148

» Angiosperms » Systematics

Edit

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Differentiate between normal and abnormal secondary growth in dicot stem. Discuss with diagram whenever necessary.

Explanation

In most of the dicot stems after differentiation of primary tissue they increase in breadth by secondary growth. This growth is due to the activity of lateral Meristems

  • The vascular cambium and phellogen or cork cambium

  • The vascular cambium differentiate into the stelar is and secondary xylem and secondary phloem. The phellogen on the other

… (569 more words) …

Question number: 149

» Angiosperms » Palynology

Edit

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Comment on stratification of pollen grain walls.

Explanation

Pollen grains (male gametophyte mother cell) or Microspore

  • During gametogenesis the nucleus of pollen grain divides into a small lenticular generative cell and large vegetative cell. The generator cell again divides and to form two male gametes and hence Pollen Grain is called the male gametophyte of plant.

  • Stratification of pollen grain

… (294 more words) …

Question number: 150

» Cryptogams » Algae

Edit

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Comment on contractile vacuoles in euglena.

Explanation

  • Contractile vacuole is vacuole type which expands and contract according to water availability inside the sell.

  • Its function is to regulate water concentration inside the cell.

  • A single cell organism lacking cell wall have contractile type of vacuole, which expand and contract itself to remove extra water from organism.

  • Point of con

… (160 more words) …

Question number: 151

» Microbiology and Plant Pathology » Viruses

Edit

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Differentiate between Isotype and Syntype.

Explanation

  • Plant name publication and designation of type of specimens follows the rules developed at the international botanical congress current rules.

  • International code of nomenclature for algae, fungi, and plants require that a single type specimen be designated at the time of publication (holotype).

  • Duplicates of the specimen with the same c

… (194 more words) …

Question number: 152

» Plant Breeding, Biotechnology and Biostatistics » Micropropagation

Edit

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Explain to what extent has the technique of Micropropagation been successful in achieving our goals.

Explanation

The techniques of Micropropagation has been successful in achieving our goals upto very long extent some of the examples are that Micropropagation techniques are now after preferred to conventional practices of a sexual propagation because of the given reasons not only for commercial point of you but also with regard to crop improvement program-

… (545 more words) …

Question number: 153

» Microbiology and Plant Pathology » Viruses

Edit

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Differentiate between Palaeozoic and Cenozoic plants.

Explanation

Types of plant found in Palaeozoic ERA and Cenozoic Era

Palaeozoic era

  • The vegetation is both aquatic and land plants.

  • Aquatic plants like Nematothallus and prototaxites showed resemblance with thallophytes. The first Fossil of land plants were found in the Silurian and Devonian period of this era.

  • Manograptus, sporogonites, zosterophyl

… (236 more words) …

Question number: 154

» Angiosperms » Ranunculaceae

» Angiosperms » Rosaceae

Edit

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Floral formula diagram of Ranunculaceae and Rosaceae.

Explanation

In ranunculaceae family there are generally three type of floral structure are seen. They are ranunculus, delphinium, clematis. Some examples are Butter cup, Larkspur, Virgins-bower.

Ranunculacese

Image shows Ranunculacese

Image Shows Ranunculacese

Image shows Ranunculacese

Image shows Delphinium

Image Shows Delphinium

Image shows Delphinium

Image shows Clematis

Image Shows Clematis

Image shows Clematis

Rosac

… (12 more words) …

Question number: 155

» Angiosperms » Embryology

Edit

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Differentiate megasporangenesis and mega gametogenesis.

Explanation

Megasporogenesis and mega gametogenesis

  • Megasporogenesis and mega gametogenesis is a very important process in angiosperms.

  • The ovule develops as multicellular Placenta outgrowth. In further development nucleus and one or two integuments are formed.

  • Hypodermal cell of nucleus become differentiated from the other and that’s call archespo

… (278 more words) …