B. SHORT ANSWER TYPE QUESTIONS
1. Why is cell membrane called selectively permeable ?
2. Name the cell organelles embeded in cytoplasm.
4. Name the different parts of a cell.
5. Why plastids are important for plants ?
3. What are unicellular organisms ? Name two unicellular organisms.
Answers
Answer:
Ans. 1. Plasma membrane allows some materials to pass through it while blocks other materials from entering through it. So, cell membrane is called selectively permeable.
Ans. 2. the cell organelles embeded in cytoplasm are endoplasmic reticulum, mitochondria, golgi bodies, lysosomes, ribosomes, nucleus,plastids, vacoule.
Ans. 3. Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organisms use many different cells to function. Unicellular organisms include bacteria, protists, and yeast.Unicelluler organisms are single celled organisms.eg. :- Amoeba, paramecium, euglena,etc.
Ans. 4. 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.
Ans. 5. Plastids are the site of manufacture and storage of important chemical compounds used by the cells of autotrophic eukaryotes. They often contain pigments used in photosynthesis, and the types of pigments in a plastid determine the cell's color.
Explanation:
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