Question

What helps overcome gravitational pull when water travels upward from roots to leaves?

Answer 1

Transpiration is a key part to the transport system of a plant. Transpiration is the loss of water vapor to the atmosphere through leaves and it works because water diffuses, or evaporates. That means water always moves from wetter to drier even against gravity. Inside a tree, water is pulled from the roots up to the leaves through a network of microscopic tubes called xylem made up of dead cells that have holes at either ends that are joined together to make hollow tubes that water can flow through. Water is sucked up through the xylem. The tension created by transpiration is strong enough to pull water up five hundred feet. In the leaves, the water evaporates through tiny holes, which open and close to regulate the amount of evaporation.

Answer 2

Actually it's same like drinking coke through straw. Transpiration generates a sucking effect. This is called as transpirational pull and it helps in overcoming the gravitational pull downwards.

Answer 3

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Answer 4

@Abhisar Transpiration causes the pressure that generates the suction in the xylem, actually ^-^. Xylem are a key factor in the explanation. Without them, the student may not understand where this takes place.

Answer 5

yes..i agree, xylem are the straws basically...i never went against uh \(\huge\color{green}{ت}\)
@DangerousJesse

Answer 6

Good job !
@DangerousJesse

Answer 7

And transpiration creates a pressure difference basically, it decreases the water pressure at leaves which causes a suction.
\(\color{green}{\huge\ddot\smile}\)

Answer 8

@DangerousJesse it's good you're providing answers, but don't fail to provide citations and quotation marks when coping and pasting something you didn't write yourself.

Answer 9

I actually do show sauce sometimes, I just tend to forget. I never meant to take credit for that paragraph, I was merely trying to help the student.

Answer 10

it's a good habit to keep, and i know you didn't mean to, it happens.