Select the correct statements related to the activity of cork cambium:
1. | The outer cells differentiate into phelloderm. |
2. | The cork differentiated from cork cambium, is impervious to water due to deposition of tannins and resins. |
3. | Cuts the cells only on the outer side. |
4. | Cuts the cells on inner as well as outer side. |
Which of the following is not a character of collenchyma tissue?
1. | They provide mechanical support to the growing part of the plant |
2. | They occur in layers below epidermis in dicotyledonous plants |
3. | They consist of cells with thick corners due to cellulose deposition |
4. | They are usually dead and without protoplasts |
A: | Long-distance flow of photoassimilates in plants occurs through sieve tubes. |
R: | Mature sieve tubes have parietal cytoplasm and perforated sieve plates. |
1. | If both Assertion & Reason are true and the reason is the correct explanation of the assertion. |
2. | If both Assertion & Reason are true but the reason is not the correct explanation of the assertion. |
3. | If the Assertion is a true statement but the Reason is false. |
4. | If both Assertion and Reason are false statements. |
A: | In the dicot stem, the vascular bundles are open. |
R: | Cambium is present between xylem and phloem of the vascular bundle in the dicot stem. |
1. | If both Assertion & Reason are true and the reason is the correct explanation of the assertion. |
2. | If both Assertion & Reason are true but the reason is not the correct explanation of the assertion. |
3. | If Assertion is a true statement but the Reason is false. |
4. | If both Assertion and Reason are false statements. |