What is common to all plants?

All plant cells have organelles and nucleus. Chloroplasts are found in all plants. Food is prepared by plants using chlorophyll which is present in chloroplasts. You can read about the Plant Tissues – Classification, Definition, Types in the given link.

Further readings:

1. Science & Technology Notes For UPSC – General Science Notes 
2. Science & Technology Questions in UPSC Mains GS-3