2006-10-14 13:55:07 · 12 answers · asked by STORMY K 3 in Science & Mathematics ➔ Botany
A sprout contains an embryo situated between the two cotyledons. When watered the embryo grows and due to the gravity and sunlight, the embryo comes out as a shoot. It has great affinity towards sunlight. this is my answer.
2006-10-14 14:00:23 · answer #1 · answered by arawind 1 · 0⤊ 1⤋
It's called geotropism - the way a plant seed responds to gravity. Once the sprout breaks the surface, then heliotropism (how a plant responds to sunlight) takes over.
Here is a good discussion:
http://school.discovery.com/lessonplans/programs/tropisms/
2006-10-14 21:08:53 · answer #2 · answered by F. Frederick Skitty 7 · 3⤊ 2⤋
It doesn't. What it follows is the light and moisture, the root goes towards the moisture in the dirt and the sprout goes towards the light.
It is called phototropism. Positive phototropism is when the stem grows towards light and negative phototropism is when root grows away from light.
2006-10-14 20:58:56 · answer #3 · answered by smarties 6 · 2⤊ 0⤋
Its simple....The plant just follows the direction of where the sunlight is coming from. Dont believe me? Try this. You kno vines? Well, you might observe that they keep on curving up on all sorts of things. Obseve their ends. Yes. They are facing the light. Got my point? Hope i helped. =)
2006-10-14 23:23:26 · answer #4 · answered by Charlene A 2 · 0⤊ 1⤋
Heat from the sun... if it too deep it wont sprout.
2006-10-14 21:02:17 · answer #5 · answered by Selene 2 · 0⤊ 1⤋
the wonderful "intelligence" that makes birds able to migrate also helps plants know which way is "up".... plus gravity and sunlight
2006-10-14 20:56:53 · answer #6 · answered by leavemealonestalker 6 · 0⤊ 1⤋
They are effected by gravity, they grow away from the pull of gravity
2006-10-14 21:05:55 · answer #7 · answered by teddybear 3 · 0⤊ 1⤋
heat of the sun
2006-10-14 20:56:48 · answer #8 · answered by soda7020 2 · 1⤊ 1⤋
sunlight
2006-10-14 21:02:17 · answer #9 · answered by hector 4 · 0⤊ 0⤋
your mom knows which was is up
2006-10-14 22:37:57 · answer #10 · answered by ArmyGirlfriend 3 · 1⤊ 0⤋