Anatomy of Flowering Plants Test

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Anatomy of Flowering Plants Test - 58

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Question 1
1 / -0

Lenticels develop through the activity of _____________.

A
Vascular cambium

B
Dermatogen

C
Phellogen

D
Intercalary meristem

Solution

C. Phellogen
EXPLANATION: Lenticels develop in woody stems where the epidermis is replaced by cork tissue and appear as raised circular spots. It helps in gaseous exchange. It is developed through the activity of phellogen which is a ring of meristematic tissues formed as a result of dedifferentiation of cortex outer cells of dicot stem during extra Stelar secondary growth.
So, the correct answer is C.
Question 2
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Ground tissue consists of

A
Epidermis and cortex.

B
All tissues internal to endodermis.

C
All tissues external to endodermis.

D
All tissues except epidermis and vascular tissues.

Solution

Ground tissue of plants consists of all tissues except epidermis and vascular tissues. It is divided into three types based on the nature of the cell walls. These are parenchyma, collenchyma and sclerenchyma.
Thus, the correct answer is option D.
Question 3
1 / -0

Water containing cavities in vascular bundles occurs in

A
Sunflower

B
Maize

C
Pinus

D
Cycas
Solution
1. Sunflower is a dicot stem plant and vascular bundles are collateral conjoint and open type.
2. In monocot like Zea mays (maize) vascular bundles are collateral, conjoint and closed type and the lowermost vessel and xylem parenchyma dissolve to form a water-containing cavity called protoxylem cavity.
3. Pinus and Cycas are gymnosperms that lacks xylem vessels.
So the correct option is 'Maize'.
Question 4
1 / -0

Consider the following families.
a. Orchidaceae
b. Potostmaceae
c. Trapaceae
In which of these the endosperm, a nutritive tissue, is NOT formed?

A
$$1$$ only

B
$$2$$ only

C
$$2$$ and $$3$$

D
$$1, 2$$ and $$3$$

Solution

The correct answer is A.
Orchidaceae lack endosperm,they form a symbiotic relationships with various mycorrhizal basidiomycetes fungi that provide them the necessary nutrients to germinate.As the chance for a seed to meet a suitable fungus is very small,only a minute fraction of all the seeds released, grow into adult plants
Question 5
1 / -0

Quiescent centre is found in a plant at

A
Root tip

B
Shoot tip

C
Cambium

D
Leaf tip
Solution
1. The quiescent center is present in the root behind a region of meristematic activity and cell of this region is either not dividing or divide very slowly but are able to attain activity of division when and where is required.
2. At shoot tip the apical meristem is present.
3. Cambium is the meristem present between vascular bundles and helps in the secondary growth.
4. Leaf tip contains cells that are not specialized.
So the correct option is 'Root tip'
Question 6
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Arrangement of vascular bundles in a dicot root is

A
Collateral.

B
Radial.

C
Bicollateral.

D
Conjoint.

Solution

Arrangement of vascular bundles in a dicot root is radial. In this, the xylem and the phloem are arranged separately. The xylem and the phloem are situated on alternate radii of an axis.
Thus, the correct answer is option B.
Question 7
1 / -0

Identify the contraceptive device shown below and identify its implantation site.Select the correct option:
Contraceptive device Site of implantation
1 Lippes Loop Uterine wall
2 LNG-20 Fallopian tube
3 Multiload 375 Uterine wall
4 Implants Subcutanceous

A
1,2,3

B
2,3,4

C
1,3,4

D
only 4

Solution

Lippes Loop, LNG-20 and Multiload 375 are Intrauterine devices to help birth control.
So, the correct option is C.
Question 8
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In the transverse section of a dicot root.

A
The protoxylem vessels are present towards the periphery and metaxylem vessels are present towards the centre

B
The protoxylem vessels are present towards the centre and metaxylem vessels are present towards the periphery

C
Protoxylem is completely surrounded by the metaxylem vessels

D
Metaxylem is completely surrounded by protoxylem

Solution

A . The protoxylem vessels are present towards the periphery and metaxylem vessels are present towards the centre.

In dicotyledonous plants, the root xylem is extrach i.e protoxylem is always from the Centre and metaxylem are towards the centre.
Question 9
1 / -0

Tissue composed of non-parenchymatous cells and having isodimetric or irregular shape is:

A
Sclereid

B
Sclerenchyma fibre

C
Sieve tube

D
Idioblast

Solution

Sclereids are composed of sclerenchymatous cells, lignified wall, and long tubular pits. The sclereids may be spherical, oval, cylindrical, T-shaped, dumbell-shaped or even stellate in shape. It serves the function of support in several plants. It prevents the soft tissues of the plant from collapsing. These are generally dead cell and isodiametric in shape.
So, the correct answer is option A.
Question 10
1 / -0

Phellogen and phellem respectively denotes-

A
Cork and cork cambium

B
Cork cambium and cork

C
Secondary cortex and cork

D
Cork and secondary cortex
Solution
Correct Option: B
Explanation:
- In the dicot stem, the cortical cells differentiate to give rise to meristematic tissue called cork cambium or phellogen.
- After the cambium divides, it forms phellem, also called cork, on the outer side.
- Towards the inner side, it forms the secondary cortex or phelloderm.
Hence, phellogen and phellem respectively denote cork cambium and cork.

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	Contraceptive device	Site of implantation
1	Lippes Loop	Uterine wall
2	LNG-20	Fallopian tube
3	Multiload 375	Uterine wall
4	Implants	Subcutanceous

Anatomy of Flowering Plants Test - 58

Result

Anatomy of Flowering Plants Test - 58

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SHARING IS CARING

Question 1

Vascular cambium

Dermatogen

Phellogen

Intercalary meristem

Solution

Question 2

Epidermis and cortex.

All tissues internal to endodermis.

All tissues external to endodermis.

All tissues except epidermis and vascular tissues.

Solution

Question 3

Sunflower

Maize

Pinus

Cycas

Solution

Question 4

$$1$$ only

$$2$$ only

$$2$$ and $$3$$

$$1, 2$$ and $$3$$

Solution

Question 5

Root tip

Shoot tip

Cambium

Leaf tip

Solution

Question 6

Collateral.

Radial.

Bicollateral.

Conjoint.

Solution

Question 7

1,2,3

2,3,4

1,3,4

only 4

Solution

Question 8

The protoxylem vessels are present towards the periphery and metaxylem vessels are present towards the centre

The protoxylem vessels are present towards the centre and metaxylem vessels are present towards the periphery

Protoxylem is completely surrounded by the metaxylem vessels

Metaxylem is completely surrounded by protoxylem

Solution

A . The protoxylem vessels are present towards the periphery and metaxylem vessels are present towards the centre. In dicotyledonous plants, the root xylem is extrach i.e protoxylem is always from the Centre and metaxylem are towards the centre.

Question 9

Sclereid

Sclerenchyma fibre

Sieve tube

Idioblast

Solution

Question 10

Cork and cork cambium

Cork cambium and cork

Secondary cortex and cork

Cork and secondary cortex

Solution

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A . The protoxylem vessels are present towards the periphery and metaxylem vessels are present towards the centre.

In dicotyledonous plants, the root xylem is extrach i.e protoxylem is always from the Centre and metaxylem are towards the centre.