In the human body, the 'Corpus callosum' is a large band of nerve fibers that connects the: MCQ with Answer and Explanation

Explanation:
Analogous organs are structures that perform similar functions but have different anatomical structures and evolutionary origins. The wings of a bird (modified forelimbs with bones and feathers) and the wings of an insect (membranous extensions of the exoskeleton) both evolved for flight but are not derived from a common winged ancestor. This is an example of convergent evolution.

Explanation:
The Blood-Brain Barrier (BBB) is a highly selective semipermeable border that protects the brain from many substances in the blood. It is primarily formed by the tight junctions between the endothelial cells of the brain's capillaries. These endothelial cells are closely associated with the foot processes of astrocytes (a type of glial cell), which induce and maintain the tight junctions, restricting the passage of large molecules, toxins, and pathogens into the brain tissue.

Explanation:
Alveoli are tiny, thin-walled air sacs surrounded by a network of pulmonary capillaries. Oxygen diffuses from alveolar air into blood, and CO₂ diffuses from blood into alveolar air. Bronchi and bronchioles are air passages, trachea is the windpipe. The large surface area of alveoli (about 70 m²) facilitates efficient gas exchange.