Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
There are dead tissues in the __________.
banana peel
orange peel
guava peel
coconut husk
coconut husk
Dead tissues in plants primarily refer to the non-living components of the sclerenchyma and xylem tissues. Among the given options, the coconut husk is the most characteristic example because it is composed of sclerenchyma fibers, which are dead cells at maturity that provide structural support and protection.
Dead tissues in plants primarily refer to the non-living components of the sclerenchyma and xylem tissues. Among the given options, the coconut husk is the most characteristic example because it is composed of sclerenchyma fibers, which are dead cells at maturity that provide structural support and protection.
Think of the coconut husk like the protective frame of a heavy-duty luggage case; the living part of the seed (the kernel) is safely protected by these rigid, dead, fibrous outer layers, much like clothes inside a suitcase.
In plant biology, tissues are categorized as meristematic or permanent. Permanent tissues can be simple (like parenchyma, collenchyma, and sclerenchyma) or complex (xylem and phloem). Sclerenchyma cells, which form the tough outer layers of many plant structures like the coconut husk, possess thick, lignified secondary walls that lack protoplasm upon maturity, making them dead. This structure provides high tensile strength and rigidity, essential for protecting the seed embryo.
Sclerenchyma is a type of simple permanent tissue characterized by dead cells at maturity.
Lignin deposition in the cell walls of sclerenchyma is responsible for the hardness and death of the cells.
The coconut husk is rich in sclerenchyma fibers, which make it extremely durable and water-resistant.
Living plant tissues like parenchyma are responsible for photosynthesis and storage, whereas dead tissues mainly serve mechanical functions.
Dead tissues like sclerenchyma provide mechanical support to plant organs.
Lignified cell walls provide protection against physical damage and pathogens.
Used in the extraction of coir fiber for mats and ropes.
Provides structural integrity to trees, allowing them to grow tall without collapsing.
Banana, orange, and guava peels consist primarily of living parenchyma cells and some collenchyma for flexibility during growth.
Coconut husk is specifically known for its high concentration of sclerenchyma fibers (coir).
D is correct тАФ The coconut husk is primarily composed of dead sclerenchyma tissues which provide structural strength to the fruit.
Always remember that in biology, 'dead' tissue in plants is not a sign of decay but a structural adaptation for stability and protection.
Get instant step-by-step AI explanations, full shift Previous Year Papers (SSC GD, RRB, SSC JE), and regional rank analysis on the official Examoogle App.
Free Download тАв 100K+ Aspirants