The pigment that gives red algae their characteristic color is: MCQ with Answer and Explanation

Explanation:
Cacti, xerophytes, have spiny leaves to minimize surface area and transpiration, conserving water. Thus, R correctly explains A.

Explanation:
Bacterial cell walls (except Mycoplasma) contain peptidoglycan (murein), a polymer of N-acetylglucosamine and N-acetylmuramic acid cross-linked by short peptides. Chitin is in fungi and arthropods, cellulose in plants, hemicellulose in plant cell walls along with cellulose.

Explanation:
The retina is the inner lining of the eye containing rods and cones, the photoreceptor cells for vision. The cochlea is a spiral-shaped cavity in the inner ear containing the organ of Corti, essential for converting sound vibrations into nerve impulses. Taste buds are primarily on the tongue but are also found on the soft palate, epiglottis, and upper esophagus. Thus, statements 1 and 2 are correct.