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

Question 4 Transportation in Animals and Plants - Exercise

They are pipe-like, consisting of a group of specialized cells. They transport substances and form two-way traffic in plants. Which of the following terms qualify for the features mentioned above?

(a) Xylem tissue

(b) Vascular tissue

(c) Root hairs

(d) Phloem tissue

The answer is (d) Phloem tissue

Explanation:

Phloem tissue consists of a group of specialized cells. Sieve tubes are elongated tubular conducting channels of phloem through which food is transported. The contents of phloem can move in the upward as well as in the downward direction. Therefore, they form two-way traffic in plants.

Video transcript
"hello guys welcome back to the homework i am levant kumar working as a tutor that will do so today we are going to solve and explore one interesting problem so let's see what is that here subtract 2a minus 5b plus 2c minus 9 from 3 a minus 4 b minus c plus 6 it will be very very very easy so let's see how we can do that okay so from 3 a minus 4 b minus c plus 6 we need to subtract what minus of 2a minus 5b plus 2c minus 9 okay so how we can do that let's see now okay so now observe properly let's write all the like terms aside so now it will be off so 3a and here it will be 3a minus 4b minus here observe properly so minus 4b minus c plus 6 and here minus 2a and now observe properly minus multiplied by minus okay so minus multiplied by minus is equals to plus according to the rules of multiplication so minus multiplied by minus plus okay so now plus 5b and here minus multiplied by place so minus multiplied by plus is equals to minus itself okay so minus itself here so this place will be becoming as minus 2 c i need the same thing minus multiplied by minus is equals to plus so plus 9 okay so now just write all the like terms aside okay so now 3a minus 2a this it at one place and now minus 4b and here plus 5b at one place and then minus c and then minus 2c at one place and then plus 6 plus 9 at one place okay so now 3 a minus 2 a a and then minus 4 b plus 5 b so plus b only because here it is greater than 5 minus 4 plus 1 you know plus 1 only know and then minus c minus 2 c minus 3 c and then plus 15 so this is our final answer completed so the final answer we got here it has a plus b minus 3 c plus 15 is our final answer okay so i hope you have understood each and everything like what i've done here if you have any doubts please comment below don't forget to subscribe to this channel thank you so much for watching this stay tuned thank you "
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