Question

The position of antipodals in mature embryo sac in angiosperm plant is

• A. At chalazal end
• B. At micropylar end
• C. In central part
• D. In synergid

Hint:

In embryo sac: \[ \text{Micropylar end} \rightarrow \text{Egg apparatus} \] \[ \text{Chalazal end} \rightarrow \text{Antipodal cells} \]

Answer 1

The Correct Option is A

The mature embryo sac of angiosperms is typically: \[ 7\text{-celled and }8\text{-nucleate} \] It contains:
• Three antipodal cells
• Two synergids
• One egg cell
• One central cell containing two polar nuclei
Step 1: Position of egg apparatus
• Egg cell and synergids together form the egg apparatus.
• They are present at the micropylar end.
Step 2: Position of antipodal cells
• Antipodal cells are located opposite to the micropylar end.
• Hence they are present at the chalazal end. Option analysis:
• Option (A): Correct
• Option (B): Incorrect, egg apparatus is present here
• Option (C): Incorrect
• Option (D): Incorrect, synergid is a cell type not a position Therefore: \[ \boxed{\text{(A)}} \]