Which of the following statements about prokaryotic cells is INCORRECT? MCQ with Answer and Explanation

Explanation:
The pleura is a double-layered serous membrane surrounding each lung; the visceral pleura adheres to the lung surface, and the parietal pleura lines the chest wall. The space between them contains pleural fluid, reducing friction during breathing. Pericardium surrounds the heart, peritoneum lines the abdominal cavity, meninges cover the brain and spinal cord.

Explanation:
Fossils provide a record of past life, showing changes. Homologous organs share common anatomy, Darwin proposed natural selection, Lamarck inheritance of acquired characters, natural selection can but not always lead to speciation.

Explanation:
Carbohydrates are the main and most readily available source of energy for cellular processes. Proteins are polymers of amino acids linked by peptide bonds, not fatty acids, which are components of lipids. Vitamins are micronutrients required in very small (trace) quantities for normal metabolism, unlike macronutrients. Therefore, only statement 1 is correct.