The animal that has a four-chambered stomach for rumination is: MCQ with Answer and Explanation

Explanation:
Alveoli are thin-walled air sacs where O₂ and CO₂ exchange occurs. The voice box is the larynx; diaphragm is skeletal muscle; pulmonary veins carry oxygenated blood.

Explanation:
In C3 plants (e.g., wheat, rice), CO₂ is fixed by the enzyme RuBisCO, which catalyzes the reaction between CO₂ and RuBP, producing two molecules of 3-phosphoglycerate (3-PGA), a three-carbon compound. In C4 plants, the primary acceptor is PEP, leading to four-carbon OAA. C3 plants are the most common, but are less efficient in hot, dry conditions due to photorespiration.

Explanation:
Louis Pasteur developed pasteurization (heating to kill spoilage organisms), vaccines for rabies and anthrax, and disproved spontaneous generation.