Consider the following statements about biodiversity: 1. Biodiversity includes genetic, species, and ecosystem diversity. 2. Hotspots are regions with high endemism and habitat loss. 3. The Western Ghats is a biodiversity hotspot. Which of the above is/are correct? MCQ with Answer and Explanation
Consider the following statements about biodiversity:
1. Biodiversity includes genetic, species, and ecosystem diversity.
2. Hotspots are regions with high endemism and habitat loss.
3. The Western Ghats is a biodiversity hotspot.
Which of the above is/are correct?
A. 1 and 3 only
B. 1, 2, and 3
C. 1 and 2 only
D. 2 and 3 only
Answer: Option B
Solution (By JKSSB Mock Tests)
All are correct: biodiversity has three levels; hotspots have high endemism and threat; Western Ghats is a recognized hotspot.
In plant physiology, the 'Guttation' is the process by which water is exuded from the plant in liquid form. This typically occurs from specialized structures at the leaf margins called:
Explanation:
Guttation is the exudation of water in liquid form from the intact, uninjured surfaces of plants, typically from the margins or tips of leaves. This occurs when root pressure is high (usually at night or early morning when transpiration is low and soil moisture is high) and the rate of water absorption exceeds the rate of transpiration. The water is forced out through specialized structures called hydathodes (or water stomata), which are located at the leaf margins and lack the mechanism to close like regular stomata.
Explanation:
Vitamin C is a cofactor for enzymes that hydroxylate proline and lysine in procollagen, essential for proper collagen triple helix formation. Deficiency results in weak collagen and scurvy. Vitamin A is for vision, D for calcium, K for clotting.
Explanation:
Malaria is a life-threatening mosquito-borne infectious disease caused by protozoan parasites of the genus Plasmodium. Four species infect humans: P. falciparum (most severe), P. vivax, P. ovale, and P. malariae. The parasite undergoes a complex life cycle in both humans (asexual phase) and the female Anopheles mosquito (sexual phase).
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