Question
Describe components of phloem. Define translocation.
✓
Answer
Phloem is made up of four types of elements: Sieve tubes, companion cells, phloem fibres and the phloem parenchyma.
-
Sieve tubes: These are tubular cells with perforated walls. These cells are responsible for transportation of food and nutrients.
-
Companion cells: These cells are found associated with sieve tubes and connected with it by simple pits. These cells are long, narrow and thin walled. These cells are living.
-
Phloem fibres: They have thick cell wall and they provide mechanical support to plant.
-
Pholem parenchyma: These cells are living and often cylindrical in shape.
The transport of food from leaves to other parts of the plant is called translocation
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Give four important functions of epithelial tissue. Name one specific place in the body where each function is carried out.
Distinguish between Nonchordata and Chordata.
Distinguish between prokaryotic and eukaryotic cells.
Mention various functions of epithelial tissues.
"We can treat an infectious disease by killing microbe". Justify the statement with suitable examples.
- Identify A and B cells.
- What will happen if B cells are kept in hypotonic solution.
- What will happen if A cells are kept in hypertonic solution.
State and explain in brief the four major factors, which are causes of disease.
“Multicellular organisms show division of labour.” Explain the statement with the help of example.
What are diploid and haploid number?
Mention three different ways in which insect pests can attack the crop plant.