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If plants lacked anthocyanin, no part of the plant would display purple or blue colour. Anthocyanin attracts the insects for pollination and seed dispersal. These processes will be affected due to lack of anthocyanin. These pigments are also said to be protective in nature for the plant. This protection will not be given to the plant in absence of anthocyanin.

Mitochondria carry out oxidation of carbohydrates, fats, etc. with the help of enzymes. Plastids are synthesising carbohydrates with the help of solar energy and chlorophyll. Both the cell organelles have their own sets of different enzymes as per their role. If there would have been no difference between mitochondria and plastids, the specific functions would not have been taken place.

Plastids are present only in plant cells. 

Plastids mainly of two types. 

1. Chromoplasts (coloured) and 

2. leucoplasts (colourless). 

Chloroplasts are the type of chromoplasts present only in plants. 

The primary function of a chloroplast is to trap the energy of sunlight and transform it to chemical energy thus helping to carryout photosynthesis. 

Chromoplasts are responsible for having various colours of fruits, flowers and leaves. 

Leucoplasts are used to store starch, oil and proteins.

(i) Cell wall is mainly composed of carbohydrates like cellulose and pectin.

(ii) Plasma membrane is said to be a selectively permeable membrane as it allows some substances to enter the cell, while prevents other substances.

(iii) Homeostasis is maintained in the cell by plasma membrane.

(iv) An organelle is a specialized subunit having specific function within the cell.

1. All the cell organelles are spread in the cytoplasm of a cell. 

2. The cytoplasm is the medium for many cellular chemical reactions. 

3. The cytosol which is the part of cytoplasm other than cell organelles stores many vital substances like amino acids, glucose, vitamins, etc. 

4. Cytosol also helps in the cellular movements.

1. Nucleus is the most important part of the eukaryotic cell. 

2. Inside the nucleus there is round darkly stained nucleolus. 

3. The nucleus is covered over by double membrane which is porous. 

4. The nuclear pores allow the transport of different substances in and out of the nucleus to cytoplasm.

5. Inside the nucleus is the chromatin network which contains chromosomes. Chromatin fibres are thin which condense to form chromosomes. The chromosomes become clear and distinct at the time of cell division. 

6. In every cell there are specific number of chromosomes. Chromosomes contain genes which are bearers of hereditary characters.

(i) Nucleolus. (All the others are cell organelles but nucleolus is not a cell organelle present in cytoplasm.)

(ii) Chlorophyll. (DNA and Ribosomes are present in plant as well as in animal cells. Chlorophyll is present only in plant cells.)

1. The jelly like material present between the cell membrane and nucleus is called cytoplasm. 

2. Cytoplasm without cell organelles is called cytosol. 

3. All the cell organelles are spread in the cytoplasm. 

4. Cytosol stores many vital constituents such as amino acids, glucose, vitamins, etc. 

5. The cytoplasm of animal cells is dense and granular while that of plant cells is thin and peripheral. It is pushed to sides due to large central vacuole.

1. Lysosome helps in the destruction of attacking viruses and bacteria and thereby help in the immune response.

2. Lysosomes act as demolition squads. They destroy worn-out cellular organelles and organic debris. This process is called autolysis which All Pagesmeans self-destruction. 

3. They are also called suicide bags as in a worn out, damaged or old cell, lysosomes automatically burst. The lytic enzymes present in the lysosome digest their own cells. 

4. Lysosomes can digest stored proteins, fats during starvation.

1. Vacuoles maintain the osmotic pressure of the cell. 

2. Various metabolic byproducts and end products such as glycogen, proteins, water, etc. are stored in the lysosome. 

3. In food vacuole of amoeba, the food is temporarily stored till digestion. In other animal cells, vacuoles can store waste products and food.

4. Vacuoles of plant cells can provide turgidity and rigidity as it contains good amount of cell sap.