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5. THE FUNDAMENTAL UNIT OF LIFE
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How do substances like $CO_2$ and water move in and out of the cell ? Discuss.
Option A
Option B
Option C
Option D
Solution
Substances like $CO_2$ accumulate in high concentration inside the cell. There is $CO_2$ concentration difference in the internal and external environment of a cell. $CO_2$ moves out of the cell, from a region of high concentration to a region of low concentration outside the cell by the process of diffusion.
Standard 9
Science
Similar Questions
Full in the gaps in the following table illustrating differences between prokaryotic and eukaryotic cells.
| Prokaryotic Cell | Eukaryotic Cell |
| $1.$ Size : generally small $(1-10 \,\mu \,m )$ $1 \,\mu \,m =10^{-6} \,m$ |
$1.$ Size : generally large $(5-100 \,\mu \,m )$ |
| $2.$ Nuclear region : ………………. and …………… | $2.$ Nuclear region: well defined and surrounded by a nuclear membrane |
| $3.$ Chromosome : single | $3.$ More than one chromosome |
| $4.$ Membrane-bound cell organelles absent | $4.$ ……………………. |
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