Q52 of 105 Page 141

What is the shape of red blood cells in human blood? What function do red blood cells perform ?

Red blood cells (RBCs) are usually spherical in shape. The main function of red blood cells is to carry oxygen from the lungs to the tissues around the body.


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50

Which of the following are plant organs and which are animal organs ?

Brain, Leaf, Lungs, Roots, Stem, Kidneys, Flower, Heart

 51

What are the functions of the following organs ?

(a) Heart (b) Brain


(c) Roots (d) Leaves

 53

State the difference between prokaryotes and eukaryotes.

 53

Name two prokaryotes and two eukaryotes.