NCERT Exemplar Solutions Class 7 Science Solutions for Transportation in Animals and Plants - Exercise in Chapter 11 - Transportation in Animals and Plants

Question 19 Transportation in Animals and Plants - Exercise

Paheli noticed water being pulled up by a motor-pump to an overhead tank of a five-storeyed building. She wondered how water moves up to great heights in the tall trees standing next to the building. Can you tell why?


Roots absorb water and minerals from the soil continuously. Evaporation of water from leaves creates a suction force which causes the water to move upwards.

Video transcript
"hello everyone welcome to little this is priya and here we have a question about atom so the question is if z equal to 3 what would be the valency of the element and also name the element so given atomic number is given atomic number is atomic number is set equal to three so when coming to the electronic configuration of electrons in that element are atom if you see in the k shell it occupies the 12 electrons and in l shell it occupies one electron so the valency of these atom will be 1 so valencia of this atom is one because it is ready to lose one electron and the atom will becomes positive charge and the element according to the atomic number what has given said the atomic number of atom which has three is a lithium so lithium is an atom which kind of which has an atomic number of three so this is about the question hope you understand this video if you like my video please subscribe to leader channel and if you have any doubts you can keep a message in comment box thank you"
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