The process of obtaining a large number of identical copies of a gene or organism is: MCQ with Answer and Explanation

Explanation:
Root hairs, unicellular extensions of epidermal cells in the root maturation zone, greatly increase surface area for water and mineral absorption from the soil. Water enters by osmosis. Leaves absorb some water through stomata but primarily lose water. The stem transports, and flowers are reproductive.

Explanation:
Bacteria exhibit diverse roles; many are beneficial (e.g., gut flora, nitrogen fixers, decomposers), while some are pathogenic and cause diseases. Fungi are extensively used in food production, such as yeast (Saccharomyces) in baking and brewing, and molds (Penicillium) in cheese making (e.g., Roquefort, Camembert). Viruses are considered non-living outside a host cell because they lack metabolic machinery and cannot replicate independently; they only exhibit living characteristics when inside a host. Thus, statements 1 and 2 are correct.

Explanation:
Biodiversity hotspots are biogeographic regions with high levels of species richness and endemism that are under threat. The Western Ghats and Sri Lanka, along with the Himalayas, are recognized biodiversity hotspots in India. They harbor a vast array of flora and fauna, many of which are found nowhere else in the world, due to their unique geographical and climatic conditions.