25- Which organelle is responsible for maintaining cell shape, providing mechanical support, and facilitating cell movement? a) Nucleus b) Endoplasmic reticulum c) Cytoskeleton d) Golgi apparatus 26- What is the function of the Golgi apparatus in a cell? a) Energy production b) Protein synthesis c) Intracellular digestion d) Processing and packaging of molecules for transport 27- Which organelle contains enzymes that break down fatty acids and detoxify harmful substances? a) Lysosome b) Peroxisome c) Vacuole d) Endoplasmic reticulum 28- Which of the following is NOT a component of the cytoplasm? a) Cytosol b) Organelles c) Nucleus d) Cytoskeleton

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Tissue renewal

In multicellular organisms, tissue is a level of structure that consists of a group of physically and functionally identical cells and their intercellular substances. Unicellular organisms do not have tissues. Tissues are absent or poorly differentiated even in the simplest multicellular animals, such as sponges. However, more evolved multicellular animals and plants have specialized tissues that may organize and govern an organism's reaction to its surroundings. The word tissue is derived from the Latin word 'weave.' Plants and animals have various kinds of tissue systems that differ in their work and composition according to the different requirements.