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The formula used to calculate the percentage of water absorbed by raisins is (W₂ - W₁)/W1 × 100. W₂ in the formula refers to:
When a cell is placed in a medium, and it increases in size, then the external medium is:
Alex conducts an experiment with a de-shelled egg by placing it first in pure water and then in a concentrated salt solution. What will be the observations in each condition?
Define osmosis and explain how it differs from diffusion, providing different examples to illustrate each process.
In brief, explain what happens when the following organelles are removed from a plant cell: (a) Nucleus (b) Cell wall (c) Cell membrane (d) Vacuole (e) Golgi apparatus
Give reason for the following: (a) Meristematic cells possess a prominent nucleus and dense cytoplasm but are devoid of vacuoles. (b) Plants like cacti have thick epidermis. (c) Chewing a pear fruit gives a crunchy and granular sensation. (d) It is challenging to remove the husk from a coconut. (e) Bones are strong and non-flexible.
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