European Journal of Science and Mathematics Education
By Vitharana, P. R. K. A
“Student misconceptions about plant transport – a Sri Lankan example”
Publisher:
3/3
Pp. 275-288
2015
Student misconceptions about plant transport – a Sri Lankan example
Type: Empirical
Data collection method: Interview, Test
Number of subjects, range: Large — 31 or more
Grade and age of subjects: 9th-12 grade — 15-18 years
Student misconceptions of plant transport
Water absorption
- The movement of water to the root hair cells occur due to osmosis since solute concentration in the fluid inside root hair cells is lesser than in the fluid outside (soil).
Mineral salt absorption
- Absorption of mineral irons in plants occur due to concentration gradient.
- Absorption of mineral irons take place through permeable membranes.
- Absorption of mineral irons occur due to osmosis since it is to according to concentration gradient.
Transportation of water
- A continuous water column maintains in xylem vessels in a tall plant due to the force exerted by root system.
- A continuous water column maintains in the xylem vessels due to lose of water vapor from plants.
- Transportation of water through xylem vessels to leaves of a tall plant occur due to transpiration pull since it loses water from leaves and fills vacant places.
- Transportation of water to the leaves of a tall plant through xylem vessels occurs due to continuous upward pressure excreted by roots.
Transpiration
- A person under a large tree in a sunny day feels cool due to transpiration since water vapor releases from different parts of the plant.
- Transpiration is loss of water vapor from different parts of a plant.
- Transpiration Rate of Transpiration is greater when the humidity is higher since temperature increases in the environment.
- When the humidity in the environment is higher, the amount of water vapor in the air becomes limited.
- Rate of transpiration is slower when the humidity is higher since temperature decrease in the environment.
Organic food transportation
- Plants obtain organic food by root hairs and transport all parts of plants.
- Food storage in plants occurs only in the upper parts of plants.
Organic food transportation
- The movement of food in phloem tissues takes place due to the concentration gradient.
- Mass flow occurs due to the movement of materials to a direction due to gravitational force.
- Mass flow is the movement of particles to the same direction due to pressure changes.