9th Class Biology – Short Questions & Answers
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What is the significance of the cell cycle?
The cell cycle is essential for growth, repair, and reproduction of cells, allowing organisms to grow and maintain tissue function.
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Define cytokinesis.
Cytokinesis is the final step in the cell cycle where the cytoplasm divides, forming two distinct daughter cells.
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Define cytoplasm.
Cytoplasm is the gel-like substance that fills the cell, providing a medium for cellular processes and holding the cell’s organelles in place.
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What is the role of the cell membrane?
The cell membrane regulates the entry and exit of substances, protecting and maintaining the cells integrity.
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Name any two types of cells.
Two types of cells are animal cells and plant cells.
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What is the function of mitochondria?
Mitochondria generate energy for the cell through cellular respiration, converting nutrients into ATP (adenosine triphosphate).
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Define ribosomes.
Ribosomes are small organelles responsible for protein synthesis in the cell.
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Define species.
A species is a group of organisms that can interbreed and produce fertile offspring under natural conditions.
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Describe the structure and function of plant and animal cells.
Plant Cells: Have a rigid cell wall made of cellulose, a large central vacuole, and chloroplasts for photosynthesis. Animal Cells: Do not have a cell wall or chloroplasts and have smaller vacuoles. Animal cells have centrioles involved in cell division. Both plant and animal cells share organelles like the nucleus, mitochondria, and ribosomes.
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What is the importance of Latin in scientific naming?
Latin is used in scientific naming because it is a universal language that ensures clear and consistent communication among scientists worldwide, regardless of their native language.
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