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

Question 7 Transportation in Animals and Plants - Exercise

In a tall tree, which force is responsible for pulling water and minerals from the soil?

(a) Gravitational force

(b) Transportation force

(c) Suction force

(d) Conduction force


The answer is (c) Suction force


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 valencia of electrons so let us look into this the question is number of valency electrons in chlorine ion r option a 16 option b 8 option c 17 option d 18. so coming to the answer of this question is 8 so how i will explain you as you know electronic distribution of chlorine atom will be like this follows so in k shell there will be 12 in k shell l has 8 m has 7 so this is the distribution of chlorine atom chlorine electrons in the atom so valencia electrons are 7 hence chlorine gains chlorine is ready to gain one electron for the formation of chlorine atom so hence the valency is eight hope you understand this video if you like my video please subscribe to our leader channel and if you have any doubts you can keep a message in comment box thank you"
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