Angiosperms (IFS Botany): Questions 11 - 18 of 33

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Question number: 11

» Angiosperms » Pollination an Fertilization

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Comment on the Stratification of pollen grain walls. (Paper - 1, Section - B)

Explanation

  • Pollen is micro gametophytes of seed plants which produce the male gametes or sperm cells.

  • Pollen grains have a hard coat that protects the male gametes during the process of their movement between the stamens to the pistil of flowering plants or from the male cone to the female cone… (261 more words) …

Question number: 12

» Angiosperms » Development of Male and Female Gametophytes

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Stages depicting the formation of vegetative and generative cells during male gametophyte development in angiosperms (Paper - 1, Section - B)

Explanation

  • Development of male gametophyte starts in pollen grains.

  • Microspore undergoes mitotic divisions and forms two unequal cells; vegetative cell and generative cell.

  • The larger cell is called vegetative cell and the smaller cell is called generative cell or germinative cell.

  • Vegetative cell is also called as tube cell.

  • Vegetative cell… (322 more words) …

Question number: 13

» Angiosperms » Patterns of Embryo Development

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Comment on Plumbago type of embryo sac development. (Paper - 1, Section - B)

Explanation

Tetrasporic Embryosac:

  • It is formed by all four megaspore nuclei because meiosis is not accompanied by Cytokinesis, so that four nuclei of megaspores are formed.

  • All four nuclei are collectively known as “Coenomegaspore”.

  • Generally all the four Nuclei of megaspores take part in the formation of the seven celled and… (102 more words) …

Question number: 14

» Angiosperms » Ranunculaceae

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Draw scientifically accurate diagrams of the following and label the parts: Floral formula and floral diagram of Ranunculaceae and Rosaceae (Paper - 1, Section - B)

Explanation

Ranunculaceae:

 Image showing floral formula & floral diagram of Ranunculaceae

Image Showing Floral Formula & Floral Diagram of Ranunculaceae

There is 5 calyx and 5 corolla is present which are free, stamens are numerous, carpels are numerous and flower is bisexual.

Rosaceae:

Image showing floral formula and diagram of Rosaceae family

Image Showing Floral Formula and Diagram of Rosaceae Family

In Rosaceae family, flowers are actinomorphic, 5 free… (15 more words) …

Question number: 15

» Angiosperms » Development of Male and Female Gametophytes

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Differentiate between Megasporogenesis and megagametogenesis. (Paper - 1, Section - B)

Explanation

Megasporogenesis:

  • The formation and development of megaspores is called Megasporogenesis.

  • The formation of megaspores occurs inside the ovules of seed plants. A diploid cell in the ovule is called megaspore mother cell which is undergoes to the meiosis and form four haploid megaspores.

  • In most plants, out of four only… (268 more words) …

Question number: 16

» Angiosperms » Systematics

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Write the botanical name, family, active constituents and uses of any five medicinal plants of commercial importance in India. (Paper - 1, Section - B)

Explanation

1. Turmeric (Haldi):

Botanical name: Curcuma longa

Family: Zingiberaceae

Active constituent:

Curcumin (diferuloylmethane) is a polyphenol compound responsible for the bright yellow color of turmeric.

Uses:

  • Use as the blood purifier and is very useful in the common cold, leprosy, affections of the liver, dropsy and wound healing.

  • Used… (456 more words) …

Question number: 17

» Angiosperms » Anatomy

Appeared in Year: 2013

Short Answer Question▾

Write in Short

Draw scientifically accurate diagrams of the following and label the parts: T. S. of any stem showing interxylary and intraxylary phloem (Paper 1, Section B)

Question number: 18

» Angiosperms » Systematics

Appeared in Year: 2013

One Liner Question▾

Write in Brief

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

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