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Study the given statements carefully and...

Study the given statements carefully and give the answer.
(A)Bark is a nontechnical term that refers to all tissues exterior to the vascular cambium only
(B)Phellem, phellogen and phelloderm are collectively called pericarp.
(C)In the dicot stem vascular cambium is completely secondary in origin.
(D)In dicot stem endodermis cells are rich in starch grains and the layer is also called starch sheath.

A

A, B correct, C, D incorrect

B

A, C correct, B, D incorrect

C

A, B, C correct, D incorrect

D

B, C incorrect, A, D correct

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Assertion: In dicot stem, endodermis is also called as starch sheath. Reason: The cells of the endodermis are rich in starch grains.

Consider the following statement: (a) Complimentary cells are thin walled, rounded, colourless parenchymatous and non-suberized (b) secondary phloem and periderm are included in bark. (c) In a dicot root, vascular combium is completely secondary in origin (d) In a dicot root, vascular cambium is initially wavy which later becomes circular. How many of above statemetns are correct?

How many of the following meristems are completely secondary in origin ? A. Cork cambium of a dicot stem B. Vascular cambium of a dicot stem C. Cork cambium of a dicot root D. Vascular cambium of a dicot root

State true (T) or false (F) to the given statements and select the correct option.(a) All tissue layers exterior to the vascular cambium constitute bark.(b) Root hypodermis is sclerenchymatous. (c) Ground tissue of leaves is called mesophyll.(d) Due to presence of casparian strips, endodermis is impervious to water.

Which of the following statements are incorrect? (i). Secondary growth usually occurs in monocotyledons. (ii). Bark refers to all tissues interior to vascular cambium. (iii). Lenticels permit the exchange of gases between the outer atmosphere and the internal tissue of the stem. (iv). Annual rings give an estimate of the age of the tree.

Which of the following statement is / are not true A. Cork cambium is otherwise called phellogen B. Cork is otherwises called phellem C. Secondary cortex is otherwise called peirderm D. Cork cambium, cork and secondary cortex are collectively called phelloderm

(a.) In the young dicot stem, cambium present in patches as a single layer between xylem and phloem. (b.) Vascular and cork cambium both are form the lateral meristem. (C.) The medullary cells are derived from the interfascicluar cambium. In given statements, which of the following are correct ?

Identify the correct Statement with respect to secondary growth in dicot roots . a. Vascular cambium arises from the parenchyma. b. This secondary meristem is known as interfascicluar cambium c . The outer layer of pericycle given rise to the phellogen . d. Growth rings are well Marked and distinct .

State true(T) or false(F) to the given statements and select the correct option. ( a ) Annual rings are distinct in plants growing in temperate regions. ( b ) Lenticels occur in most woody trees and permit the exchange of gases. ( c ) Due to stelar secondary growth, central cylinder of wood surrounded by secondary phloem is formed. ( d ) The cells of endodermis opposite to protoxylem divide to give rise vascular cambium in dicot roots.

Read the following statements. A. All tissue on the inner side of the endodermis constitute the stele. B. Peripheral vascular bundles are generally larger than the centrally located ones in monocot stems. C. In late wood, cambium produces a large number of xylary elements having vessels with wider cavities. D. The cork is impervious to water due to suberin deposition in the cell membrane. How many of the above statements are incorrect?

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