All living things are made up of cells. The cell is the basic structural and functional unit of life. They were discovered by Robert Hooke in the year 1665. Cells consist of cytoplasm, organelles and nucleus enclosed within a plasma membrane. The membrane contains biomolecules such as proteins and lipids.

Match the following: Column A Column B (a)Unicellular (i)Green Plants (b)Multicellular (ii) Amoeba (c)Phototropism (iii)Plants and Animals (d)Autotrophs (iv)Animals (e)Heterotrophs (v)Growth towards light

(a)- (ii) Unicellular organisms are made up of only one cell that carries out all the functions needed by the organism. Unicellular organisms include bacteria, protists like Amoeba , and yeast. (b) - (iii) Multicellular organisms are composed of more than one cell, with groups of cells differentiating to take on specialised functions. Animals (Example: earthworm) and plants (Example: Mango) are multicellular organisms. (c) - (v) The movement of plant parts in response to light is called phototropism. The roots of the plant grow away from light while stem grows towards the light. Roots are negatively phototropic and stem is positively phototropic. (d) - (i) Green plants produce their own food by a process called photosynthesis. Therefore, plants are called autotrophs. (e) - (iv) Animals do not contain chlorophyll (a green coloured pigment), therefore cannot prepare their food. All animals depend on plants and other animals for their food. Therefore, they are called heterotroph. Column A Column B (a) Unicellular (ii) Amoeba (b) Multicellular (iii) Plants and animals (c) Phototropism (v) Growth towards light (d) Autotrophs (i) Green plants (e) Heterotroph (iv) Animals

Cell is the structural and functional unit of life. It is discovered by the scientist called Robert Hooke in 1665. The components of cell are cell membrane, nucleus, and cytoplasm. It contains a jelly-like structure which contains many organelles such as, mitochondria, chloroplast, nucleus, Golgi complex, ribosomes etc.

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Which of these is the correct order of arrangement from smallest to largest?

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Important Questions on Living Beings

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Science>Biology>Living Beings>General Introduction of Cell and Microorganisms.

Why diffusion process is not suitable for transportation in multicellular organisms ?

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Science>Biology>Living Beings>General Introduction of Cell and Microorganisms.

The shell of an egg is removed by dissolving it in :

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Science>Biology>Living Beings>General Introduction of Cell and Microorganisms.

What is a cell?

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Science>Biology>Living Beings>General Introduction of Cell and Microorganisms.

What are the basic parts of all the cells?

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Science>Biology>Living Beings>General Introduction of Cell and Microorganisms.

The basic unit of living things is called :

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Science>Biology>Living Beings>General Introduction of Cell and Microorganisms.

What is the basic similarity among all the living organisms (plants and animals)?

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Science>Biology>Living Beings>General Introduction of Cell and Microorganisms.

Can the various parts of a flower be observed by a microscope/hand lens/ electronic microscope? Give reason.

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Science>Biology>Living Beings>General Introduction of Cell and Microorganisms.

What is the basic structural and functional unit of life?

EASY

Science>Biology>Living Beings>General Introduction of Cell and Microorganisms.

_____ is the smallest entity of our body.

MEDIUM

Science>Biology>Living Beings>General Introduction of Cell and Microorganisms.

Match the following:

Column A	Column B
(a)Unicellular	(i)Green Plants
(b)Multicellular	(ii)Amoeba
(c)Phototropism	(iii)Plants and Animals
(d)Autotrophs	(iv)Animals
(e)Heterotrophs	(v)Growth towards light