Anatomy of Flowering Plants — BIOLOGY STD 11 Science — Question

Write the name of the smallest cell organelle.

Name any three poisonous snakes and give their scientific names.

Whose hypothesis revealed that plant purifies air while breathing animals and burning candles fouls it?

Which scientist discovered oxygen in 1774?

What are comma-shaped bacteria called?

Name a plant whose flowers are asymmetric.

State the reason for the occurrence of diabetes insipidus in an individual.

Suppose you accidentally find an old preserved permanent slide without a label. In your effort to identify it, you place the slide under microscope and observe the following features :-

1. Unicellular
2. Well defined nucleus
3. Biflagellate–one flagellum lying longitudinally and the other transversely.

What would you identify it as? Can you name the kingdom it belongs to?

In earthworm, from which segment intestine starts and where it ends?

Mitral valve, tricuspid valve, A-V valve, Venous valve.