The correct answer is:(a) Suberin. Cork cells are made impervious to water and gases due to the presence of suberin, a hydrophobic substance that forms a protective barrier, preventing water loss and providing resistance to microbial attack. Class 9th Science ...
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The correct answer is:(d) remain at the same position. Trees grow from their tips (both at the roots and shoots), not by stretching upwards from the base. So, the nail will stay at the same height, though it might get ...
The correct answer is:(b) Collenchyma. Commercial fibers like jute and flax are derived from the collenchyma tissue, which provides mechanical support and flexibility to plants. These fibers are obtained from the stem and are widely used in making ropes, bags ...
The correct answer is:(c) Companion cells Companion cells, which are found in the phloem of vascular plants, retain their nucleus at maturity. They play a crucial role in supporting sieve tube elements, which lose their nucleus at maturity but remain ...
The correct answer is:(d) Limbs. Voluntary muscles, also known as skeletal muscles, are found in the limbs and are under conscious control, allowing for movement of body parts. Class 9th Science NCERT MCQ Questions NCERT Books MCQ Questions Session 2024-2025.
The correct answer is:(d) striated, uninucleated, branched and involuntary. Cardiac muscles are striated (having a banded appearance), uninucleated (one nucleus per cell), branched (forming a network), and involuntary (their contraction is not under conscious control). They are found in the ...
The correct answer is:(b) Tendons. Nerve cells (neurons) contain nerve endings, dendrites and axons, which are involved in transmitting electrical signals. Tendons, however, are connective tissues that attach muscles to bones Class 9th Science NCERT MCQ Questions NCERT Books MCQ ...
The correct answer is:(d) Osteocytes Osteocytes are the mature bone cells found in bony tissue. They are embedded in the bone matrix and help in maintaining bone tissue. Chondrocytes are found in cartilage, while basophils and mast cells are types ...
The correct answer is:(b) Kidney The kidney does not contain cartilage. Cartilage is present in structures like the nose, larynx and ear, where it provides support and flexibility. The kidney is made up of soft tissue and nephrons. Class 9th ...
The correct answer is:(b) Conduction of water The epidermis primarily functions in protection, transpiration and gas exchange (through stomata), but it does not conduct water. Water conduction is carried out by the xylem in plants. Class 9th Science NCERT MCQ ...