Daily Practice Problems Morphology of Flowering Plants

Question 1:

Choose the correct options:

1. The term used to describe the pattern of arrangement of veins and veinlets of a leaf lamina is:

(a) Aestivation

(b) Inflorescence

(d) Venation

2. Neem leaves are example of :

(a) Simple leaf

(b) Pinnately compound leaf

(d) None of the above

3. The primary tap root is short-lived among which of the following root system?

(a) Tap root system

(b) Fibrous root system

(d) Both (a) and (c)

4. Trimerous flowers could be seen in which among the following families?

(a) Liliaceace

(b) Solanaceae

(d) Malvaceae

Question 2:

Name the following:

1. A condition in which multiple stamens fuse to form one bundle.

2. The term given to the carpels present in fused condition.

3. A type of leaf in which the incisions of the lamina reach upto the midrib breaking it into number of leaflets.

4. The term given to a flower which can be divided into two equal halves when cut through only one vertical plane.

5. A proteinaceous layer that separates the endosperm and the embryo in a monocotyledonous seed.

Question 3:

Fill in the blanks with appropriate words:

1. Modification of stem and leaves, which are tender and coil spirally to help the plants in climbing are called __________.

2. The flat expanded part of the leaf with veins and veinlets is called __________.

3. In __________ compound leaves, the leaflets are attached to a common point.

4. A flower having floral appendages in multiples of five is called __________ flower.

5. The fruit developed without the fertilisation of the ovary is called a __________ fruit.

Question 4:

Complete the given analogies by observing the relation between the first two words and then filling an appropriate word at the fourth place:

1. China rose : Twisted aestivation :: Pea : __________

2. Whorled phyllotaxy : Alstonia :: Opposite phyllotaxy : __________

3. Tendrils : Climbing :: Thorns : __________

4. Tomato : Axile placentation :: Pea : __________

5. Pisum : Diadelphous:: Hibiscus : ___________

Question 5:

Give a technical term for each of the following floral conditions:

1. The stamens are attached to the tepals.

2. A type of flower in which the ovary is inferior.

3. The sepals are fused with one another.

4. A flower in which bracts are absent.

5. A type of phyllotaxy in which multiple leaves arise from a single node.

Question 6:

Define the following terms:

1. Perigynous flower

2. Inflorescence

3. Diadelphous

4. Actinomorphic

5. Aestivation

Question 7:

State whether the following statements are true or false.

1. A sterile stamen is called a staminode.

2. China rose shows polyadelphous condition of stamens.

3. In valvate aestivation, the floral appendages in a whorl overlap one another at one margin.

4. The calyx is the outermost whorl of the flower and its units are called petals.

5. Mangrove trees growing in swampy areas develop pneumatophores.

Question 8:

Match the columns A and B.

Column A	Column B
1. Whorled phyllotaxy	a. Fruit
2. Reticulate venation	b. Encloses plumule
3. Ripened ovary	c. Alstonia
4. Coleoptile	d. Encloses radicle
5. Coleorhiza	e. Dicot plants

Question 9:

Write down the floral formula of a flower based on its following floral characteristics:

Actinomorphic, hermaphrodite, hypogynous, five free sepals, five fused petals, 5 stamens fused with the petals and two united carpels with superior ovary.

Question 10:

Draw a neat labelled diagram of a vertical section through a monocotyledonous seed.

Question 11:

How are tap root, adventitious roots and fibrous roots different from one another?

Question 12:

Briefly explain with the help of a diagram the three regions of a root.

Question 13:

Name the modification of roots seen in the following cases:
1. Sugarcane

2. Rhizophora

3. Banyan tree

4. Sweet potato

Question 14:

Mention any two modifications of stem witnessed in plants belonging to areas of arid region.

Question 15:

What is meant by venation? Discuss its types. Also, state the type of venation which is a characteristic of:

(i) Monocotyledons

(ii) Dicotyledons

Question 16:

What is phyllotaxy? Discuss its types with one example of each.

Question 17:

How is racemose inflorescence different from cymose inflorescence?

Question 18:

Into how many categories could flowers be classified based on the position of ovary?

Question 19:

How are valvate, twisted and vexillary aestivation different from one another?

Question 20:

What is meant by placentation? Briefly explain axile, marginal and basal placentation.

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