Chief characteristics of stem do not include:

1. Develops from the plumule

2. Positive phototropic nature

3. Presence of nodes and internodes

4. Endogenously developed multicellular hair

Subtopic:  Morphology of Stems |
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Consider the following statements regarding aerial modifications of stem:

I. Tendrils help plants to climb as seen in passion flower and Vitis

II. Axilary and Terminal buds are modified into thorns in lemon, pomegranate and karonda

III. Prickles develop superficially at the surface of the stem and are distributed irregularly as in rose and plum

Of the given statements, correct are:

1. I and II only

2. I and III only

3. II and III only

4. I, II and III

Subtopic:  Morphology of Stems | Aerial Stem Modification |
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Match aerial modifications of stem given in column I with their descriptions in column II and choose your answer from the codes given below:

A   

Phylloclade   

P   

Green, flattened or cylindrical branches of unlimited growth

B

Cladode

Q

Branches of limited growth that become green and flat like a leaf

C

Bulbil

R

Modified vegetative bud with stored food meant for reproduction

Codes:

 

A     

B     

C

1.

P

Q

R

2.

P

R

Q

3.

R

P

Q

4 . 

Q

R

P

Subtopic:  Morphology of Stems | Aerial Stem Modification |
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In racemose type of branching:

1. Branches continue to grow indefinitely and give off further branches laterally in a basipetal order

2. Branches continue to grow indefinitely and give off further branches laterally in an acropetal order

3. Branches stop growing after some time and give off further branches laterally in a basipetal order

4. Branches stop growing after some time and give off further branches laterally in an acropetal order

Subtopic:  Inflorescence |
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In Australian Acacia, the petiole or any part of rachis becomes flattened taking the shape of a leaf and turning green in color. This structure is called as:

(1) Phylloclade

(2) Cladode

(3) Phyllode

(4) bulbil

Subtopic:  Morphology of Stems | Aerial Stem Modification |
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In the ray florets of sunflower, the condition of the flower is termed as:

(1) Superior

(2) Inferior

(3) Epigynous

(4) Hypogynous

Subtopic:  Flower & Parts of Flower: I | Flower & Parts of Flower |
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China rose is not characterized by:

(1) Axile placentation

(2) Valvate aestivation

(3) Monoadelphous stamen

(4) Superior ovary

Subtopic:  Flower & Parts of Flower: I | Flower & Parts of Flower |
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The given floral formula describes:

1. Asparagus

2. Belladonna

3. Indigofera

4. Mustard

Subtopic:  Families of Flowering Plant: II | Families of Flowering Plant |
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In vexillary aestivation:

1. The standard overlaps the wings

2. The standard overlaps the keel

3. The standard is overlapped by keel

4. The keel overlap the wings

Subtopic:  Parts of Flower: II | Flower & Parts of Flower |
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Which of the following would not be a character of Asparagus?

1. Actinomorphic flower

2. Imbricate aestivation

3. Superior ovary

4. Endospermous seed

Subtopic:  Parts of Flower: II | Flower & Parts of Flower |
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Difficulty Level: