B3 - Transport Through Plants Flashcards

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1
Q

What do phloem tubes do?

A

They transport food substances made in the leaves to growing regions and storage organs of the plant
The transport is in both directions

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2
Q

What is phloem?

A

It is made from columns of living cells with small holes in the ends to allow food substances to pass through

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3
Q

What do xylem tubes do?

A

They carry water and minerals from the roots to the stem and leaves in the transpiration stream

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4
Q

What is xylem?

A

Made of dead cells joined end to end with no end walls between them and a hole down the middle

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5
Q

What is transpiration?

A

The loss of water from the plant which is caused by evaporation and diffusion of water from inside the leaves

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6
Q

How are the effects of transpiration counterbalanced?

A

The water is replaced by the steady stream of water from the xylem vessels

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7
Q

What is the transpiration stream?

A

The continuous cycle of water evaporating off the leaves and being replaced by the roots at the sane rate as it is lost

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8
Q

Why does transpiration happen?

A

The way that leaves are adapted to perform photosynthesis means that water is lost through the stomata as a side-effect of photosynthesis

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9
Q

What are the 2 types of plant vessel?

A

Xylem

Phloem

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