The waxy layer that covers the outer surface of leaves to reduce water loss is the:
A. Palisade mesophyll
B. Epidermis
C. Cuticle
D. Spongy mesophyll
Answer: Option C
Solution (By JKSSB Mock Tests)
The cuticle is a waxy, water-repellent layer secreted by epidermal cells on the outer surface of leaves and young stems. It minimizes water loss through transpiration. Its thickness varies with plant species and habitat; xerophytes often have a thick cuticle. The epidermis is the tissue layer, palisade and spongy mesophyll are photosynthetic tissues.
Explanation:
Mendel selected Pisum sativum because it had distinct contrasting traits, was easy to cultivate, and was naturally self-pollinating, allowing controlled crosses. R explains A correctly.
Explanation:
Tuberculosis is an infectious disease caused by Mycobacterium tuberculosis, spreading through airborne droplets. Cancer, diabetes, and hypertension are non-communicable.
Explanation:
Metabolism is the sum of all chemical reactions occurring in a living body. It is the only feature present in all living organisms without exception. While growth and reproduction are common, they are not universal (e.g., sterile mules). Non-living things can also exhibit growth by accumulation or movement, making metabolism the true defining property.
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