Plants grow after being cut because intercalary meristematic tissues remain active at nodes and internodes. These cells divide rapidly and produce new branches or shoots, helping grasses, hedges and other plants regenerate after cutting or grazing.
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Plant and animal tissues differ because plants are fixed and require support, transport and growth tissues. Animals move actively and need flexible tissues for movement, coordination and sensing. Their tissues develop differently according to nutrition methods, body structure and lifestyle.
Life starts from a single cell called a zygote. It divides repeatedly through mitosis to form many cells. These cells differentiate into tissues organs and organ systems, eventually developing into a complete multicellular organism with specialised functions.
In multicellular organisms, specialised cells form tissues, tissues form organs and organs form systems. Each structure performs particular functions efficiently. This division of labour improves coordination, reduces workload on individual cells and enables organisms to perform complex life processes successfully.
The study of cells and tissues helps us understand growth, repair, transport, movement and coordination in living organisms. It also supports medical research, tissue culture, disease treatment, crop improvement and scientific advancements that improve agriculture, healthcare and overall human welfare.