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**A nail is inserted in the trunk of a tree at a height of 1 meter from the ground level. After 3 years the nail will**

**(a) move downwards**

**(b) move upwards**

**(c) remain at the same position**

**(d) move sideways**

Answer:

The answer is (c) remain at the same position

**Explanation:**

Longitudinal growth in the stem always takes place on the top hence apical meristem in the below region remains constant hence there will be no change in the position of the nail inserted in the trunk of the tree.

"hello students welcome to leader
learning this is ashwini i teach science
at lido
so here in this question if a nail is
inserted in the trunk of a tree
at a height of 1 meter from the ground
after 3 years the nail will be a
move downwards b move upwards
c remain at the same position and d it
moves sideways
so the correct option is c
it will remain at the same position
why is it so because as we see
in the plant okay suppose i'm drawing
here a tree
that okay now
if we place a nail here okay at this
point that is one meter above from the
ground
after three years the tree's height will
be
suppose this is like it will grow
somewhat bigger so will the nail will
going to shift in the upward direction
or downward direction or remain at the
same position
or it will going to move sideway
so the answer it it will going to remain
at this position after three years or
after 10 years
because the growth the longitudinal or
the growth and
length of the tree increases only at
towards the top okay so the tree will
increase its length like this in the
upward direction
it will not going to affect this
downward portion or the base portion
okay so it will be like this and apical
meristem is present here
at the tip part okay so apical meristem
will going to increase the height of the
plant from the tip okay so it will going
to increase the length so there will be
no change in the position of
this nail it will be at the one meter
distance from the
trunk or the ground level i hope
everything is clear to you
if you have any doubts then please put
it down in the comment section for more
such video solutions please subscribe
leader learning thank you"

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