B State wh
1. Root hair increase the surface area for absorption of water.
2. Transport of food takes place in the xylem of plants.
3. Water enters the root hair by osmosis.
4. Phloem consists of tracheids and vessels.
5. Root hair are multicellular and very delicate.
6. Iron is essential for chlorophyll formation.
C Identify the error(s) in the given statements.
1. Phloem transports water and minerals.
2. Tracheids are the only living component of phloem tissue.
3. In xylem, water moves in downward direction.
4. In roots, water is absorbed by diffusion as its concentration is higher in soil.
5. Transportation produces a cooling effect on the plant due to evaporation of water fr
6. Wind decreases the rate of transpiration since water evaporates slower on a windy
D. Choose the correct option.
Answers
ANSWER :
B :
1. Roots have hairlike projections called root hairs protruding from their surface. These root hairs help the plant absorb more nutrients and water because they increase the available surface area.
2. The xylem tissue transports water and minerals from the roots to the leaves whereas the phloem tissue transports food from the leaves to the other parts of the plant. ... When transpiration in plants occurs, water gets evaporated from the leaves. This results in more water being pulled from the root.
3. Water entered through the root of the plant is transported to leaves and is lost in the air. The hair of the root is hypertonic to the surrounding soil or water. This causes the entry of water from the soil to the root hair through the process of osmosis.
4. Tracheids and vessel elements: Tracheids (top) and vessel elements (bottom) are the water conducting cells of xylem tissue. Phloem tissue is responsible for translocation, which is the transport of soluble organic substances, for example, sugar.
5. The root hairs are unicellular, thin walled and un-branched structures and are short lived. However, there are exceptions such as the ones found in the aerial adventitious roots of Kalanchoe where these are multicellular.
6. Iron is an essential micronutrient for almost all living organisms because of it plays critical role in metabolic processes such as DNA synthesis, respiration, and photosynthesis. In plants, iron is involved in the synthesis of chlorophyll, and it is essential for the maintenance of chloroplast structure and function.
C :
1. Phloem transports soluble organic compounds.
2. Sieve tubes, Companion cells and Phloem parenchyma are the living component of Phloem tissue.
3. In Xylem, water moves in upward direction.
4. In Roots, water is absorbed by osmosis as its concentration is higher in soil.
5. Transpiration produces a cooling effect on the plant due to evaporation of water.
6. Wind increasea the rate of transpiration since water evaporates higher on a windy day.
HOPE IT HELPS.....