What is absent in mammalian erythrocytes?

Mammalian erythrocytes are

Mammalian erythrocytes are

Mammalian erythrocytes are

Erythrocytes are

Life period of mammalian erythrocytes is

Life period of mammalian erythrocytes is

A common characteristic feature of plant sieve tube cells and most of mammalian eryhrocytes is cells and most of mammalian erythrocytes is

A common characteristic feature of plant sieve tube cells and most of mammalian erythrocytes is

A common characteristic feature of plant sieve tube cells and most of mammalian erythrocytes is