Question

A common characteristic feature of plant sieve tube cells and most of mammalian erythrocyes is ______________.

• A. Absence of mitochondria
• B. Presence of cell wall
• C. Presence of haemoglobin
• D. Absence of nucleus

Answer 1

The correct option is D Absence of nucleus

• The mammalian RBCs lose their nuclei at maturity and survive for a few months only.
• The food conducting phloem cells called sieve tubes, of flowering plants also lose their nuclei at maturity but they remain functional for several years.