AIIMS Botany Anatomy Of Flowering Plants Class 11 Questions

Assertion: Annual rings are used to calculate the age of tree. Reason: Secondary growth is not found in Bamboo

The quiescent centre in root meristem serves as a:

Pith cavity occurs in the stem of

Which of the following statement is true?

In Kranz anatomy, the bundle sheath cells have

The given figures are types of elements (A and B) which constitute one type of complex tissue (C) of a plant. Identify A, B and C.

Each of these questions contains two statements. Assertion (A) and Reason (R). Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a), (b), (c) and (d) given below. Assertion (A) Secondary growth in dicot roots occur with the help of vascular cambium and phellogen. Reason (R) Vascular cambium is formed from conjunctive parenchyma and part of Pericycle.

Tyloses are balloon-like outgrowths in the lumen of secondary xylem tracheids and vessel of duramen region. These are actually

Pith cavity occurs in the stem of

Which of the following statement is true?

In Krnaz anatomy, the bundle sheath cell have

Assertion (A) Secondary growth in dicot roots occur with the help of vascular cambium and phellogen. Reason (R) Vascular cambium is formed from conjunctive parenchyma and part of pericycle.

Math the Column I with Column II.

Sporopollenin is a constituent of pollen exine. It can be degraded by the action of

Select the correct pair amongst the following.

Assertion: Protostele is the simplest stele. Reason: Protostele is the most advanced type of stele.

What is the characteristic of tapetum?

Given figure shows

Assertion : Movement of materials inside phloem is bidirectional i.e. it can be both upwards or downwards. Reason : Movement of molecules inside xylem is unidirectional i.e. always upwards.

Assertion : In angiosperms, transport of food and water is more efficient than gymnosperms and pteridophytes. Reason : In angiosperms longitudinally arranged sieve elements and vessels with perforated end walls are present.

Why are vascular bundles closed in monocots?

Assertion : Cork prevents the loss of water by evaporation. Reason : Cork cells contain tannins.

Bark refers to

The branched sclereids present in hydrophytes are

The cells of the quiescent centre are characterised by

Assertion: Protoplasmic continuity is maintained in perforated septum. Reason: Usually a small pore remains in the centre of the septum.

Assertion (A) : In woody stems, the amount of heart wood continues to increase year after year. Reason (R) : The cambial activity continues uninterrupted.

Grafting is successful in dicots but not in monocots because the dicots have

Which one of the following statements pertaining to plant structure is correct?

The sugarcane plant has

In a plant organ which is covered by periderm and in which the stomata are absent, some gaseous exchange still takes place through

Companion cells in plants are associated with

Cork cambium results in the formation of cork which becomes impermeable to water due to the accumulation of

In a dicotyledonous stem, the sequence of tissues from the outside to the inside is:

Passage cells are found in

Assertion : The collenchyma is thick walled living tissue. Reason : The collenchyma is thickened due to the deposition of pectin.

Porous wood contains:-

Velamen is a specialized tissue found in

Coconut's Husk fibre coir of commerce is extracted from

Stomata opens

Assertion : Stomata remain open during day. Reason : Stomata help in exchange of gases.

Assertion : Monocot stem bear collateral open vascular bundles. Reason : If cambium is absent such vascular bundles are called closed type.

A scientist wants to study the viral effects on plants. Which of the following part of the plant should he exclude?

Root cap is formed by

Assertion: Vascular cambium is considered as lateral meristem. Reason: It gives rise to lateral shoots.