Transport In Plant

Question 1

Function of xylem

Answer 1

Transports water and minerals up from root to other parts of plant

Question 2

Function of phleom

Answer 2

Transport sucrose and ammino acids up and down the plant

Question 3

Role of xylem in plants

Answer 3

-Xylem made of many hallow dead cells joined end to end
-End walls of cells have disappeared so long open tube formed
-Xylem vessel run from root of plant right up through stem,branch out into every leaf
-Xylem vessel contain no cytoplasm no nucleus
-Walls made of celluose and lignin

Question 4

How water absorbed by root hair cell

Answer 4

water moves by osmosis from high water potential in soil to low water potential in root hair cells through semi permeable membrane

Question 5

What is transpiration

Answer 5

Loss of water from leaves by evaproution of water at surface of mesophyll cells followed by loss of water vapor through stomata by diffusion

Question 6

What is transpiration Stream

Answer 6

Water from xylem vessels in leaf will travel to cells by osmosis to replace it

Question 7

Importance of Transpiration

Answer 7

√Constant uptake and transport of mineral ionse
√Provide water to keep cells turgid to support upward growth of plant
√Provide water to photosynthesize cells in leaves to conduct photosynthesis
√Keep leaves cool by evaporative cooling

Question 8

Explain condition affect transpiration rate

Answer 8

Transpiration increases as increasing temperature
Light Intensity increase so transpiration increase
Humidity higher so less watery will evaporate from leaves
Wind speed increase so transpiration increase

Question 9

Role of phloem vessel in plants

Answer 9

Translocation: movment of sucrose and amino acids in phloem from regions of production to region of storage
Phleom: transport sucrose and ammino acid up and down the plant according to seasonal changes in summer and spring from leaves to all plant parts while in winter from root to all plant parts

Question 10

What is vascular bundles

Answer 10

Group of specialized tissues the xylem and phloem that transport water dissolved salts and food throghout plant

Question 11

Position of vascular bundle in root

Answer 11

At center

Question 12

Position of vascular bundle in stem

Answer 12

Arranged in ring near outside edge

Question 13

Position of vascular bundle in leaf

Answer 13

In mesophyll tissue