The enzyme that begins protein digestion in the stomach is: MCQ with Answer and Explanation

Explanation:
Producers (green plants, algae, cyanobacteria) form the first trophic level, converting solar energy into biomass. Consumers depend on them.

Explanation:
The cranium (skull) is composed of several bones fused together, encasing and protecting the brain. Vertebrae protect the spinal cord, sternum protects the heart and lungs anteriorly, pelvis supports abdominal organs and connects to legs. The cranium also provides attachment for muscles.

Explanation:
The corpus callosum is the largest white matter structure in the brain, consisting of over 200 million axons. It forms a broad, flat band located deep in the longitudinal fissure (the cleft between the two hemispheres). Its primary function is to serve as the main communication pathway, allowing the left and right cerebral hemispheres to share information, coordinate activities, and integrate sensory, motor, and cognitive functions.