Anatomy of Flowering Plants

The main function of bulliform cells in grasses is :

1. to perform photosynthesis.
2. to minimize water loss during water stress.
3. to make the leaf impermeable to fungal spores.
4. to transport water.

Find the statement that is NOT correct with regard to the structure of monocot stem.

1. Vascular bundles are conjoint and closed.
2. Phloem parenchyma is absent.
3. Hypodermis is parenchymatous.
4. Vascular bundles are scattered.

In the given figure, which component has thin outer walls and highly thickened inner walls? [Figure]

1. C
2. D
3. A
4. B

Given below are two statements: In the light of the above statements, choose the correct answer from the options given below:

1. Both Statement I and Statement II are true
2. Both Statement I and Statement II are false
3. Statement I is true but Statement II is false
4. Statement I is false but Statement II is true

Bulliform cells are responsible for

1. Inward curling of leaves in monocots.
2. Protecting the plant from salt stress.
3. Increased photosynthesis in monocots.
4. Providing large spaces for storage of sugars.

Which of the following simple tissues are commonly found in the fruit walls of nuts and pulp of pear?

1. Sclereids
2. Fibres
3. Parenchyma
4. Collenchyma

Which one of the following is not found in Gymnosperms?

1. Sieve cells
2. Albuminous cells
3. Tracheids
4. Vessels

Which of the following helps in maintenance of the pressure gradient in sieve tubes?

1. Albuminous cells
2. Sieve cells
3. Phloem parenchyma
4. Companion cells

Given below are two statements: In the light of the above statements, choose the correct answer from the options given below:

1. Statement I is true but Statement II is false
2. Statement I is false but Statement II is true
3. Both Statement I and Statement II are true
4. Both Statement I and Statement II are false

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

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below:

1. Both Statement I and Statement II are false
2. Statement I is correct but Statement II is false
3. Statement I is incorrect but Statement II is true
4. Both Statement I and Statement II are true

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

Read the following statements about the vascular bundles: Choose the correct answer from the options given below :

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

The type of tissue commonly found in the fruit wall of nuts is :

1. Sclereid
2. Parenchyma
3. Collenchyma
4. Sclerenchyma

Initiation of lateral roots and vascular cambium during secondary growth takes place in cells of

1. Pericycle
2. Epiblema
3. Cortex
4. Endodermis

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

The transverse section of a plant shows following anatomical features : (i) Large number of scattered vascular bundles surrounded by bundle sheath (ii) Large conspicuous parenchymatous ground tissue (iii) Vascular bundles conjoint and closed (iv) Phloem parenchyma absent Identify the category of plant and its part:

1. Monocotyledonous root
2. Dicotyledonous stem
3. Dicotyledonous root
4. Monocotyledonous stem

Grass leaves curl inward during very dry weather. Select the most appropriate reason from the following:

1. Shrinkage of air spaces in spongy mesophyll
2. Tyloses in vessels
3. Closure of stomata
4. Flaccidity of bulliform cells

Phloem in gymnosperms lacks:

1. Companion cells only
2. Both sieve tubes and companion cells
3. Albuminous cells and sieve cells
4. Sieve tubes only

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

Stomata in grass leaf are

1. kidney-shaped
2. barrel-shaped
3. dumb-bell shaped
4. rectangular

Secondary xylem and phloem in dicot stem are produced by

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

Casparian strips occur in

1. pericycle
2. epidermis
3. endodermis
4. cortex

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