Phyllotaxy

Q.

Explain with suitable examples the different types of phyllotaxy?

Q.

Explain with suitable examples the different types of phyllotaxy?

Q. The type of phyllotaxy in guava is

1. alternate
2. opposite decussate
3. opposite superposed
4. whorled

Q.

Assertion: plants lack excretory organs. Reason: Plants usually absorb essential nutrients and lead a passive life.

1. Both the reason and assertion are false
2. Both assertion and reason are true and the reason is the correct explanation for the assertion.
3. Both the reason and assertion are true but the assertion is not the correct explanation for reason.
4. Assertion is true but the reason is false.

Q.

Why do aquatic plants have narrow and thin ribbon-like leaves?

Q.

Each plant has different arrangement of leaves on the stem. This is called as __.

Q.

Leaf base is sheathing in-

1. Wheat

2. Maize

3. Grass

4. All of the above

Q.

Which type of phyllotaxy can be found in Alstonia?

Q. Alstonia has _____________ at each node.

1. single leaf
2. two leaves
3. more than two leaves
4. two terminal buds

Q.

Nature of defence mechanism in plants like Acacia and Cactus (Opuntia) is

1. physiological

2. morphological

3. biochemical

4. anatomical

Q. Identify in order the plants showing alternate, opposite and whorled phyllotaxy.

1. China rose, Calotropis and Nerium
2. Nerium, Calotropis, China rose
3. Nerium, China rose, Calotropis
4. China rose, Nerium, Calotropis

Q.

What is circinate ptyxis and furcate venation in fern?

Q.

Give two examples of each of the following:

Alternate arrangement

Q. The arrangement of leaves on the stem is called

1. phyllotaxy
2. venation
3. circinate vernation
4. heterophylly

Q.

Which one of the following possesses winged petiole?

1. Acacia

2. Citrus

3. Bombax

4. Asparagus

Q. Phyllotaxy in Calotropis is

1. opposite
2. none of these
3. whorled
4. alternate

Q. The type of phyllotaxy in guava is

1. alternate
2. whorled
3. opposite decussate
4. opposite superposed

Q. While describing a plant, what does the term alternate refer to?

1. Arrangement of veins in the lamina
2. Arrangement of leaves on the stem
3. Arrangement of calyx and the corolla in floral buds
4. None of these

Q.

Which of these options is correct about the leaves at each node in Alstonia?

1. Each node has one leaf

2. Each node has two leaves

3. Each node has more than two leaves

4. All options possible

Q. Water is lost in a liquid state is some plants through hydathodes. These hydathodes

1. Remain closed at night
2. Remain closed during day
3. Remain always open
4. Do not show any specificity in opening and closing

Q.

In the following question, a statement of assertion is followed by a statement of reason. Mark the correct choice.
Assertion: In opposite phyllotaxy, two leaves are borne on the opposite sides of a single node.
Reason: Opposite phyllotaxy is seen in China rose and Oleander.

1. If assertion is true but reason is false

2. If both assertion and reason are true and reason is the correct explanation of assertion

3. If both assertion and reason are true but reason is not the correct explanation

4. If both assertion and reason are false

Q.

Name a plant that has alternate phyllotaxy.

Q. Identify in order, the plants showing alternate, opposite and whorled phyllotaxy respectively.

1. Mustard, Calotropis, Alstonia
2. Sun flower, Nerium, Guava
3. Nerium, Guava, Sun flower
4. Nerium, Sun flower, Guava

Q. From which type of cells the petiole of leaf is made up of ?
OPTIONS
a) Collenchyma. b) Sclerenchyma.

Q. Alstonia has _____________ at each node.

1. single leaf
2. two leaves
3. more than two leaves
4. two terminal buds

Q. Describe different types of phyllotaxy with the help of diagrams and give one example for each.

Q. Identify in order, the plants showing alternate, opposite and whorled phyllotaxy respectively.

1. Mustard, Calotropis, Alstonia
2. Sun flower, Nerium, Guava
3. Nerium, Sun flower, Guava
4. Nerium, Guava, Sun flower

Q. While describing a plant, what does the term alternate refer to?

1. Arrangement of veins in the lamina
2. Arrangement of leaves on the stem
3. Arrangement of calyx and the corolla in floral buds
4. None of these

Q.

Give one-word for the following:

The arrangements of leaf on the stem

Q. The arrangement of leaves on the stem is called

1. venation
2. phyllotaxy
3. circinate vernation
4. heterophylly