1. Mention the differences between parenchyma, collenchyma and sclerenchyma. Also, draw the
diagrams
2. Write a note on vascular system of plants.
3. What are the types of complex permanent tissues? Write their functions.
4. Describe in brief about the various types of tissues found in animals.
5. Draw neat diagrams of voluntary, involuntary and cardiac muscles.
OBSERVE AND PERFORM
Identify the diagram and label it. Write down its functions.
Answers
General Plant Organization | Back to Top
A plant has two organ systems: 1) the shoot system, and 2) the root system. The shoot system is above ground and includes the organs such as leaves, buds, stems, flowers (if the plant has any), and fruits (if the plant has any). The root system includes those parts of the plant below ground, such as the roots, tubers, and rhizomes.
Answer:
1.Parenchyma has a thin cell wall of their cells, and are made up of cellulose. Whereas collenchyma cells have an uneven cell wall made up of pectin and hemicellulose. There is a hard and thick cell wall present of the sclerenchyma cells, which is made up of the lignin.
2. Vascular system, in plants, assemblage of conducting tissues and associated supportive fibres. Xylem tissue transports water and dissolved minerals to the leaves, and phloem tissue conducts food from the leaves to all parts of the plant.
3.The common types of complex permanent tissue are: Xylem and phloem
XYLEM: Xylem transports water and soluble mineral nutrients from roots to various parts of the plant. It is responsible for replacing water lost through transpiration and photosynthesis.
Phloem translocates sugars made by photosynthetic areas of plants to storage organs like roots, tubers or bulbs.
