Question

From the following select the type where the sixteen nucleate embryo sac is not seen?

• A. Endymion type
• B. Tetraporic type
• C. Penaea type
• D. Pepromia type

Answer 1

Answer:

A. Endymion type

The sixteen nucleate embryo sac is not seen in the Endymion type.

• The Endymion type is a bisporic embryo sac type and typically has 8 nuclei, not sixteen. It is formed from the micropylar dyad and its developmental pattern creates an 8-nucleate embryo sac.

• The types that show a sixteen nucleate embryo sac are the tetrasporic types, which include Penaea type and Pepromia type.

• The term "Tetraporic type" is not a standard or widely recognized name in embryo sac classification, but tetrasporic types with sixteen nuclei are known (such as Penaea and Pepromia).