1. to provide rich food for plants in the form of leaf mould
2. because they become heavy as they grow
3. due to the weight 6f rain
4. because they fail to obtain the supply of water arid food materials
because they fail to obtain the supply of water arid food materials
1. Strasburger
2. Caesalpino
3. Malpighi
4. Linnaeus
Malpighi
1. Only phloem in the form of bark
2. Both xylem and phloem in the same plant
3. Xylem in one and bark in the other plant
4. Phloem in one and bark in the other plant
Xylem in one and bark in the other plant
1. Labelled oxygen
2. Labelled carbon
3. Butterflies
4. Aphids
Aphids
1. water will not move upwards
2. water will not move downwards
3. minerals will not move downwards
4. sugar will not move downwards
sugar will not move downwards
1. 170mm/h
2. 170cm/h
3. 270 mm/h
4. 270cm/h
270cm/h
1. 1000 sieve plates
2. 1500 to 2000
3. 10000 sieve plates
4. 15000 to 20000 plates
1500 to 2000
1. simple diffusion
2. activated
3. facilitated diffusion
4. electro-osmosis
activated
1. A-Maturation zone B-Root hair zone C-Elongation zone
2. A-Root cap B-Meristematic zone C-Elongation zone
3. A-Meristematic zone B-Maturation zone C-Elongation zone
4. A-Meristematic zone B-Root hair zone C-Elongation zone
A-Maturation zone B-Root hair zone C-Elongation zone
1. A-Plasmolysis B-Deplasmolysis Billr
2. A-Deplasmolysis B-Plasmolysis
3. A-Endosmosis B-Exosmosis
4. A-Exosmosis B-Endosmosis
A-Endosmosis B-Exosmosis