Select which of the following statements are true for phloem.

Bi-directional movement (up and down stem).

Elongated, tubular shape with thin walled sieve tubes.

Transportation of feed and nutrients.

Occupy the centre of the vascular bundle.

Water and mineral transport from roots to aerial parts of the plant.

Which statement describes the phloem transport system of plants?

It transports sugar and is not lignified

It transports sugar and is lignified

It transports water and is lignified

What is the effect of increasing leaf area on transpiration?

It increases transpiration rate

It decreases transpiration rate

What is the important of companion cell between source and sieve tube?

Provide ATP for active transport

Provide glucose for active transport

Provide ATP for passive transport

Provide glucose for passive transport

During translocation, which of the below is NOT correct about hydrostatic pressure in the sieve tube.

Hydrostatic pressure in source is lower than in sink

Hydrostatic pressure in source is higher than in sink

Hydrostatic pressure push the fluid from region with high hydrostatic pressure to lower hydrostatic presure.

Hydrostatic pressure increase due to low osmotic pressure in sieve tube

The pressure flow model for phloem translocation states..

the pressure gradient between the sieve elements at the source and the sink drives phloem transport

that sink strength drives transport in the pholem

that transport in treachery elements is pressure dependent

the water potential gradient in the sieve elements drives transport

In an apple tree, it is expected that the sugars produced by the tree would flow from (i)____________ to (ii)__________________. Choose the option that would correctly fill in the terms in the sentence above.

(i) a leaf (ii) a growing apple

(i) the roots (ii) a growing shoot

(i) a growing shoot (ii) a leaf

Xylem and Phloem and Plant Structures

Authored by Charles Martinez

Biology

12th Grade

NGSS covered

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

An example of adhesion is

Water molecules sticking to each other

Water molecules sticking to cellulose in xylem walls

Magnets sticking to a metal wall

Gravity pulling water down

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is it called when water sticks to water?

Cohesion

Adhesion

Capillary Action

Xylem

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When the forces of cohesion and adhesion work together, water can move up the plant against the force of gravity by....

Phototropism

Geotropism

Photosynthesis

Capillary Action

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does water enter a plant?

through the stomata

through the roots

by active transport in root hair cells

by osmosis in root hair cells

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do mineral ions enter a plant?

by osmosis in root hair cells

by active transport in root hair cells

through the stomata

through the roots

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Xylem tubes are made of...

Dead cells

Living cells

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Phloem tubes are made of...

Dead cells

Living cells

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Xylem and Phloem and Plant Structures

An example of adhesion is

What is it called when water sticks to water?

When the forces of cohesion and adhesion work together, water can move up the plant against the force of gravity by....

How does water enter a plant?

How do mineral ions enter a plant?

Xylem tubes are made of...

Phloem tubes are made of...

Xylem tubes transport..

Phloem tubes transport..

Phloem tubes transport substances in which direction?

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