Morphogenesis-Cell (IFS Botany (Mains)): Questions 1 - 3 of 3

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Question number: 1

» Morphogenesis » Cell

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Explain Allium type of embryo sac. (Paper 1, Section B)

Explanation

Allium is a bisporic type of embryo sac.

  • When two megaspore nuclei participate in the development of embryo sac it is known as bisporic type of embryo sac.

  • Bisporic development occurs when either chalazal or micropylar dyad undergoes the second meiotic division.

  • In Allium type, non-functional dyad degenerates and functional… (175 more words) …

Question number: 2

» Morphogenesis » Cell

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Mention primitive characteristics of Magnoliaceae (Paper 1, Section B)

Explanation

Characteristics of Magnoliaceae:

  • Trees or shrubs

  • Leaves alternate, pinnately veined, simple stipules enclosing bud

  • Flowers solitary, actinomorphic

  • Stamens spirally arranged, ribbon-like

  • Simple leaves

  • Cone like floral axis with flowers that have six tepals

  • Spirally arranged stamens, and one, two, or many carpels

  • Flowers are bisexual and are borne on branch… (28 more words) …

Question number: 3

» Morphogenesis » Cell

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Differentiate between prokaryote and eukaryote. (Paper A Section A)

Explanation

Prokaryotic cells:

Prokaryotic cells are ells without nucleus. The DNA in prokaryotic cells is in the cytoplasm rather than enclosed within a nuclear membrane. Prokaryotic cells are found in single celled organisms like bacteria and organisms with prokaryotic cells are called prokaryotes.

 Image showing Prokaryotic cell.

Image Showing Prokaryotic Cell.

Bacterial cell is prokaryotic… (448 more words) …

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