Download App

Secondary Growth — BIO BOTANY STD 11 — Question

Tamilnadu BoardEnglish MediumSTD 11BIO BOTANYSecondary Growth5 Marks
Question
Distinguish between Phellem and Phelloderm.
✓

Answer

Phellem (Cork):
  1. It is formed on the outer side of phellogen.
  2. Cells are compactly arranged in regular tires and rows without intercellular spaces.
  3. Protective in function.
  4. Consists of nonliving cells with suberized walls.
  5. Lenticels are present.
Phelloderm (Secondary cortex):
  1. It is formed on the inner side of phellogen.
  2. Cells are loosely arranged with intercellular spaces.
  3. As it contains chloroplast, it synthesises and stores food.
  4. Consists of living cells, parenchymatous in nature and does not have suberin.
  5. Lenticels are absent.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[5 Mark each]" from Secondary Growth→Secondary Growth — all question types→BIO BOTANY STD 11 question papers→Tamilnadu Board STD 11 question papers→Tamilnadu Board question paper generator→

Similar questions

Preparation of Solution Culture to find out Mineral Deficiency
1. Take a glass jar or polythene bottle and cover with black paper (to prevent algal growth and roots reacting with light).
2. Add nutrient solution.
3. Fix a plant with the help of split cork.
4. Fix a tube for aeration.
5. Observe the growth by adding specific minerals.
→
Write an essay on the role of ethylene on plant physiology and agriculture.
→
Describe the process of non – cyclic photophosphorylation.
→
Write a detailed account on Dark field microscope.
→
Define phyllotaxy. Explain its types
→
List out the functions of Golgi bodies.
→
Draw & describe the structure of mitochondrion.
→
Define bud. Explain the types of buds based on location.
→
Imbibition experiment: Collect 5 gm of gum from Drumstick tree or Babool tree or Almond tree. Immerse in 100 ml of water. After 24 hours observe the changes and discuss the results with your teacher.
→
Describe the structure and function of different kinds of parenchyma tissues?
→