जलीय पौधों में, बड़ी वायु गुहिकाएँ (air cavities) उन्हें उत्प्लावकता (buoyancy) प्रदान करती हैं। ये गुहिकाएँ निम्नलिखित में से किस प्रकार के ऊतकों के रूपांतरित रूप से घिरी होती हैं?

The Dandi March, also known as the Salt Satyagraha, was led by which influential leader?

Which act formally granted independence to India, marking the end of British rule?

Who was the key figure in establishing the Indian National Congress?