The movement of water through a semipermeable membrane from a region of lower solute concentration to higher solute concentration is: MCQ with Answer and Explanation

Explanation:
Pellagra (niacin deficiency) presents with the three D's: dermatitis, diarrhea, and dementia. Bleeding gums is scurvy (vitamin C), bone deformities rickets (vitamin D), night blindness vitamin A deficiency.

Explanation:
Rhodopsin (visual purple) is a photopigment in rod cells consisting of opsin and retinal (from vitamin A). It bleaches upon absorbing light, initiating signal transduction for vision in low light. Cone cells contain iodopsin for color vision. Melanin is skin pigment, hemoglobin carries oxygen.

Explanation:
The Mesozoic era (about 250-65 million years ago) is called the 'Age of Reptiles' or 'Age of Dinosaurs' because reptiles, especially dinosaurs, dominated terrestrial ecosystems. It is divided into Triassic, Jurassic, and Cretaceous periods. The Cenozoic is the 'Age of Mammals', the Paleozoic saw the rise of fishes and amphibians, and the Proterozoic is earlier.