Irrespect of gravity why plants and trees grow upwards ?

Question

Irrespect of gravity why plants and trees grow upwards ?

Answer 1

Since plants need sunlight to live, they need to grow up, often against gravity. Plants contain chemicals called hormones, just like humans do, and these control how they grow.

Plant seeds contain stored energy that the plant can use to sprout within the dirt and make its way up to find the sun. If it runs out of this energy before it can reach the surface, it will die. Some hormones may even be able to tell which way gravity is pulling on it, so it can grow the opposite direction, since that will be where the sunlight is.  

Answer 2

It's because of negative gravitational tropism and positive phototropism.The plant grows away from the centre of gravity (i.e the soil ) but towards the light (i.e the sun).Plant hormones called auxins (I stand corrected) facilitate these growth patterns.Botany can be a wonderful subject sometimes.

Answer 3

plants grow towards the sun, thats why the grow up

Answer 4

To reach for the sun.  They need light to grown.  

Answer 5

now this is, at first, a counter intuitive  problem.

sunlight retards growth.

HUH?

have you seen seedlings grown in the dark?

they'er long and spindly.

sunlight retards that abnormal growth.

if you take such a seedling, that's fallen over, so it's laying down, and put it in the sun, it will turn upward.

the reason it does that is that the side that's up is getting light, and not growing (much) but the bottom is getting less light, and growing more.

which produces the curve that turns the plant more vertical.  

Answer 6

its been said

go to a jungle

and you will see the struggle

for every plant and tree to reach for the sun light