Anatomy of Flowering Plants

Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R) : In the light of the above statements, choose the correct answer from the options given below :

1. Both A and R are true but R is NOT the correct explanation of A
2. A is true but R is false
3. A is false but R is true
4. Both A and R are true and R is the correct explanation of A

Identify the correct statements: Choose the correct answer from the options given below:

1. A and D only
2. A, B and D only
3. B and C only
4. B, C and E only

In old trees the greater part of secondary xylem is dark brown and resistant to insect attack due to : Choose the correct answer from the options given below :

1. A and B only
2. C and D only
3. D and E only
4. B and D only

The anatomy of springwood shows some peculiar features. Identify the correct set of statements about springwood. Choose the correct answer from the options given below:

1. A, B, D and E only
2. A, C, D and E only
3. A, B and D only
4. C, D and E only

Interfascicular cambium is present between

1. Secondary xylem and secondary phloem
2. Primary xylem and primary phloem
3. Pericycle and endodermis
4. Two vascular bundles

Match List-I with List-II. Choose the correct answer from the options given below.

1. (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)
2. (a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)
3. (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
4. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)

Select the correct pair.

1. Loose parenchyma cells rupturing the epidermis and forming a lens shaped opening in bark - Spongy parenchyma
2. Large colorless empty cells in the epidermis of grass leaves - Subsidiary cells
3. In dicot leaves, vascular bundles are surrounded by large thick-walled cells - Conjunctive tissue
4. Cells of medullary rays that form part of cambial ring - Interfascicular cambium

Identify the incorrect statement.

1. Sapwood is involved in conduction of water and minerals from root to leaf
2. Sapwood is the innermost secondary xylem and is lighter in colour
3. Due to deposition of tannins, resins, oils etc., heart wood is dark in colour
4. Heart wood does not conduct water but gives mechanical support

Which of the statements given below is not true about formation of Annual Rings in trees?

1. Activity of cambium depends upon variation in climate.
2. Annual rings are not prominent in trees of temperate region.
3. Annual ring is a combination of spring wood and autumn wood produced in a year.
4. Differential activity of cambium causes light and dark bands of tissue – early and late wood respectively

Secondary xylem and phloem in dicot stem are produced by

1. vascular cambium
2. axillary meristems
3. apical meristems
4. phellogen

Plants having little or no secondary growth are

1. deciduous angiosperms
2. grasses
3. cycads
4. conifers

The vascular cambium normally gives rise to :

1. Primary phloem
2. Secondary xylem
3. Periderm
4. Phelloderm

Which of the following is made up of dead cells ?

1. Collenchyma
2. Xylem parenchyma
3. Phellem
4. Phloem

Identify the wrong statement in context of heartwood :

1. It is highly durable.
2. It comprises dead elements with highly lignified walls
3. It conducts water and minerals efficiently
4. Organic compounds are deposited in it

The balloon-shaped structures called tyloses

1. are extensions of xylem parenchyma cells into vessels
2. originate in the lumen of vessels
3. are linked to the ascent of sap through xylem vessels
4. characterize the sapwood

Read the different components from (1) to (4) in the list given below and tell the correct order of the components with reference to their arrangement from outer side to inner side in a woody dicot stem : (1) Secondary cortex (2) Wood (3) Secondary phloem (4) Phellem The correct order is :

1. (3), (4), (2), (1)
2. (4), (1), (3), (2)
3. (4), (3), (1), (2)
4. (1), (2), (4), (3)

Lenticels are involved in

1. Food transport
2. Photosynthesis
3. Transpiration
4. Gaseous exchange

Age of a tree can be estimated by :

1. Diameter of its heartwood
2. Number of annual rings
3. Its height and girth
4. Biomass

Interfascicular cambium develops from the cells of :

1. Endodermis
2. Pericycle
3. Medullary rays
4. Xylem parenchyma

The common bottle cork is a product of

1. Phellogen
2. Xylem
3. Vascular Cambium
4. Dermatogen

The cork cambium, cork and secondary cortex are collectively called :

1. Periderm
2. Phellem
3. Phellogen
4. Phelloderm

Heartwood differs from sapwood in –

1. Having dead and non-conducting elements
2. Being susceptible to pests and pathogens
3. Presence of rays and fibres
4. Absence of vessels and parenchyma

For a critical study of secondary growth in plants, which one of the following pairs is suitable?

1. Deodar and fern
2. Wheat and maiden hair fern
3. Sugarcane and sunflower
4. Teak and pine

In a woody dicotyledonous tree, which of the following parts will mainly consist of primary tissues ?

1. Shoot tips and root tips
2. Flowers, fruit and leaves
3. Stem and root
4. All parts

Diffuse porous wood is characteristic of those plants which are growing in :

1. Tropics
2. Temperate climate
3. Alpine region
4. Cold winter regions

Main function of lenticel is

1. transpiration
2. guttation
3. gaseous exchange
4. bleeding.