Long answer questions (write the answers in your notebook).
1. Briefly describe the structre of nucleus and mention its any two function.
2. Name the scientist who coined the term "cell". How many lenses did he use in his microscope?
What did he observe under his microscope ?
3. Name the three essential parts of a cell. Breifly describe the structure of cell-membrane.
Answers
Explanation:
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Answer:
1.The nucleus is a spherical-shaped organelle that is present in every eukaryotic cell. The Nucleus is the control centre of eukaryotic cells. It is also responsible for the coordination of genes and gene expression. The structure of the nucleus includes nuclear membrane, chromosomes, nucleoplasm, and nucleolus.
2.Robert Hooke was an English scientist who coined the term cell for the Honeycomb structures he saw in a cork slice. Through he didn't see the inside of a cell, he discovered the cell and coined the term. He used a primitive compound microscope . He only saw cell walls as it a dead tissue.
3. A cell consists of three parts: the cell membrane, the nucleus, and, between the two, the cytoplasm. Within the cytoplasm lie intricate arrangements of fine fibers and hundreds or even thousands of miniscule but distinct structures called organelles.
Explanation:
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