Which of the following is an algal biofertilizer used in rice fields? MCQ with Answer and Explanation

Explanation:
The pleural cavity between the visceral and parietal pleura contains a thin layer of pleural fluid, lubricating the surfaces to reduce friction during lung expansion and contraction. Synovial fluid is in joints, cerebrospinal fluid surrounds the CNS, lymph is in the lymphatic system. Pleural effusion is excess accumulation.

Explanation:
The cerebellum, located at the back of the brain, integrates sensory input and fine-tunes motor activity, posture, and equilibrium. The cerebrum handles conscious thought and voluntary actions, the thalamus relays sensory information, the medulla controls vital autonomic functions like breathing and heart rate.

Explanation:
Mitochondria are double-membrane organelles with circular DNA (like prokaryotes) and 70S ribosomes, supporting the endosymbiotic origin. They are absent in prokaryotes. They are the site of aerobic respiration. The matrix contains enzymes for Krebs cycle. The inner membrane forms cristae, housing electron transport chain and ATP synthase.