DNA fingerprinting relies on the variation in which type of DNA sequences? MCQ with Answer and Explanation

Explanation:
The Casparian strip is a waterproof band of suberin and lignin found in the radial and transverse cell walls of the endodermis (the innermost layer of the cortex) in plant roots. It acts as a barrier to the passive flow of water and dissolved minerals through the cell walls (the apoplastic pathway). This forces water and solutes to cross the selectively permeable plasma membrane and enter the symplastic pathway, allowing the plant to control and filter what enters the vascular cylinder (stele).

Explanation:
Chondrichthyes are cartilaginous fishes with a skeleton made entirely of cartilage, a ventral mouth, and lack operculum. Pristis (sawfish), Scoliodon (dogfish), and Carcharodon (great white shark) belong to this class. Labeo rohita (Rohu) and Catla catla are Osteichthyes (bony fishes). Hippocampus (seahorse) is also a bony fish. Exam tip: Chondrichthyes = cartilaginous; Osteichthyes = bony.

Explanation:
The hepatic lobule is the basic structural and functional unit of the liver, consisting of plates of hepatocytes radiating from a central vein. Bile canaliculi, sinusoids, and portal triads are key features. Nephrons are kidney units, alveoli lung units, islets pancreatic endocrine units.