The distinction between prokaryotes and eukaryotes is mainly based on:

Strasburger is famous for

Choose the correct option regarding cell structure and components:

Identify the correct statements w.r.t. the given cell diagram:
$A$. Concerned with lipid and steroidal hormone synthesis.
$B$. Outer non-living rigid structure which gives shape to the cell and protects from mechanical damage and infection.
$C$. Both lie perpendicular to each other and each has an organisation like the cart wheel.
$D$. Responsible for trapping light energy for the synthesis of sugar.
$E$. Present in cells actively involved in protein synthesis and secretion.
$F$. Spherical structures,rich in hydrolytic enzymes.

According to the modern colloidal theory,the cytoplasm is a polyphasic colloidal system. Who first proposed this?

Which of the following organelles is not a part of the endomembrane system?