We are providing NCERT Solutions for Class 9 … ... Phloem/xylem. Solution: “A group of cells that are similar in structure and/or work together to achieve a particular function is called a tissue.” Ans. A collection of questions on CBSE-Tissues with solutions created by best teachers are available as a PDF download. Xylem and phloem are types of complex tissues. 12. Which tissue makes up the husk of coconut? Define tissue. The chief difference between protophloem and metaphloem is: Secondary phloem: It has originated from the vascular cambium during the secondary growth of the plant. How many types of elements together make up the xylem tissue? Phloem Definition. Both fibres and sclereids have thin areas on them that are called pits. Draw a labelled diagram of a … Let us compare their structure and functions. It provides protection. storage organ and growing regions) On the basis of origin, phloem is classified into two categories primary and secondary phloem. Primary phloem originates from procambium and secondary phloem originates from vascular cambiilrn. Phloem is a complex tissue of a plant which was first introduced by a scientist Nageli in the year 1853. It consists of living cells like sieve cells, companion cells, phloem parenchyma and the only dead cell which is phloem fibres. Cell membrane: It is the phospholipid bilayer membrane which is present interior to the cell wall. What are the functions of areolar tissue? Sieve elements comprise of sieve tube and sieve cells. Cellulose microfibrils which are the major constituent of the sieve tube provide the mechanical strength to the sieve tube. 1. How does the cork act as a protective tissue? Therefore it carries out the translocation of the soluble organic molecules like amino acids, sugars etc. The main activity of this tissue is to transport nutrients and food from leaves to other growing parts of plants . Question 1. 4. Your email address will not be published. 10. What are the functions of the stomata? This will help them to get better marks in examinations. Along with the textbook solutions, students can also find some important questions, keynotes and other information about the topic. CBSE Ncert Notes for Class 9 Biology Tissues. Along with this topic, students can also find some interesting activities or experiments on tissues. 14. Stomata are the tiny pores present on the outer layer of the cells, the epidermis. Phloem is the complex tissue, which acts as a transport system for soluble organic compounds within vascular plants.. A tissue is defined as a cluster of cells which are similar in structure and work together to perform a particular function. It is the food conducting tissue of vascular plants. Phloem is a complex tissue or heterogeneous vascular tissue that stores and conducts principally the products of photosynthesis in vascular plants and sometimes adds mechanical strength. Complex tissues are made of more than one type of cells that work together as a unit. Differentiate between parenchyma, collenchyma and sclerenchyma on the basis of their cell wall. Practice more on Tissues. The term phloem is derived from the Greek word – φλοιός (phloios), meaning bark. Parenchyma found in aquatic plants has large air cavities which enables them to float and are hence called aerenchyma. Define the term “tissue”. Tissues Class 9 NCERT Solutions have been explained in a simple and easy to understand manner. It is composed of: (i) Sieve tubes - Sieve tubes are slender, tube-like structures composed of elongated thin-walled cells, placed end to end. The different elements of phloem include sieve tubes, companion cells, and phloem parenchyma and phloem fibres. 9 NCERT Solutions have been explained in a simple and easy language phloem tissue diagram class 9,! Tissue system in plants also allows back and forth movement of sap the... 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