Phloem Vascular Tissue
Phloem Vascular Tissue
Phloem Vascular Tissue: In plants their are two types of conducting tissues : Xylem and Phloem . Phloem is a complex permanent tissue that translocate substances like food, minerals and hormones from the part of synthesis to other parts of the plant. The food manufactured in leaves is translocated upwards, downwards and laterally to all parts of the plant through the phloem. The phloem also conducts some other substances such as amino acids. The conducting cells of the phloem are cylindrical cells called ‘sieve tubes’, which have sieve like partitions at both ends. These partitions are called ‘sieve plates.’ Besides sieve tubes, phloem has companion cells and phloem parenchyma. Phloem consist of different type of cells :
1. Sieve tubes : These are elongated, cylindrical tubes with perforated end walls known as sieve plates. These are placed end to end in a linear row. they have vacuolated cytoplasm and lacks nucleus.
2. Companion cells: They are associated with sieve tubes.they have dense cytoplasm and nucleus. They help sieve tubes int the conduction of food material.
3. Phloem Parenchyma: They are thin walled and living and help in storage of food.
4. Phloem fibres: They provide mechanical support to the tissue. They are non living , thick walled ,elongated and spindle shaped cells. Commercially used phloem fibres are jute, Hemp, Flex etc.
Sucrose is the main form of carbohydrate that is translocated in plants. Its translocation into the phloem tissue occurs with the expenditure of energy through ATP, which increases the osmotic pressure of the tissue causing water to move into it.
_____________________ provide mechanical support to the tissue and are non living, thick walled ,elongated and spindle shaped cells. | |||
| Right Option : C | |||
| View Explanation | |||
In plants, ________________________ tissues are thin walled and help in storage of food. | |||
| Right Option : C | |||
| View Explanation | |||
Phloem is a complex permanent tissue that translocate substances like_____________________ from the part of synthesis to other parts of the plant. | |||
| Right Option : D | |||
| View Explanation | |||
Students / Parents Reviews [10]
My experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
Eshan Arora
8thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
