Practice Jan 2025

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What is meiosis?

Back

Meiosis is a type of cell division that reduces the chromosome number by half, resulting in the production of gametes (sperm and eggs) with half the genetic material of the parent cell.

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Why is meiosis important for reproduction?

Back

Meiosis is crucial for sexual reproduction as it ensures that offspring have the correct number of chromosomes, combining genetic material from both parents.

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What is the role of gametes in human reproduction?

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Gametes are specialized reproductive cells (sperm and eggs) that carry half the genetic information needed to form a zygote.

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What is the function of mitochondria in cells?

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Mitochondria are the powerhouse of the cell, providing energy (ATP) through cellular respiration.

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What is the difference between mitosis and meiosis?

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Mitosis results in two identical daughter cells for growth and repair, while meiosis produces four genetically diverse gametes for reproduction.

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What is DNA and its role in cells?

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DNA (deoxyribonucleic acid) contains the genetic instructions for the development, functioning, growth, and reproduction of all known living organisms.

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What happens to energy as it moves up an energy pyramid?

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As energy moves up an energy pyramid, it decreases due to energy loss as heat and the inefficiency of energy transfer between trophic levels.

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What is the significance of the nucleus in a cell?

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The nucleus contains the cell's genetic material (DNA) and controls cellular activities, including growth, metabolism, and reproduction.

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What is ATP and its importance in cells?

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ATP (adenosine triphosphate) is the primary energy carrier in cells, providing energy for various cellular processes.

Front

What is differentiation in biology?

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Differentiation is the process by which cells become specialized in structure and function to perform specific tasks in an organism.