Leaf Modifications

Q.

In pitcher plant, which part of the leaf is modified into the pitcher?

1. petiole

2. lamina

3. midrib

4. veins

Q.

What is leaf modification? What are the different leaf modifications in plants? [5 MARKS]

Q.

Tendrils of pea is a modification of the stem.

1. True

2. False

Q.

Rearrange the jumbled words and phrases into meaningful sentences.

The first one has been done as an example. Example: in/the cactus/very hot, /grows/dry places The cactus grows in very hot, dry places. (a) do not/leaves/have/they/but/spiny/needles (b) owers/and/bloom/some of them/cacti/at night/are big (c) absorb/from fog/water/in the air/cacti can

Q.

Green stems in desert plants can perform photosynthesis.

1. True

2. False

Q. In what way does a large surface area of leaves help the plant?

1. Absorbs as much sunlight as possible
2. Absorbs as much water as possible
3. Attracts insects for pollination
4. Attracts insects for pollination

Q.

What is a flower stem called?

Q.

Which of the following is a function of the spines in cactus?

1. Spines check the loss of water from the plant body

2. Spines protect the plant from herbivores feeding on them

3. Spines help the plant is climbing

4. Spines help the plant to trap insects

Q.

Which of the following does not have a modification of leaf?

1. Venus flytrap

2. Cactus

3. Onion

4. Neem

Q. Why does a cactus plant have fleshy leaves like photosynthetic stem?

Q.

Give examples of two plants in which leaves are modified into leaf tendrils.

Q.

Which of these do not have modified leaves?

1. Venus flytrap

2. Cactus

3. Onion

4. Neem

Q.

Sam carried out an experiment using two potted plants.He took one wooden chamber and made a slit in the chamber so that it allows the sunlight to enter the chamber and he placed one of the potted plant inside it. He then took the other potted plant and placed it directly in sunlight.What are his observations?

1. The stem of the plant kept inside the wooden chamber bends and grows towards the direction of sunlight.

2. The stem of the plant kept inside the wooden chamber grows upward without any bend.

3. The stem of the plant kept outside the wooden chamber bends and grows towards the direction of sunlight.

4. All of the above

Q. The stem of some plants occur in the form of thin thread-like leafless branches called__________.

1. tendril
2. twiner
3. phylloclade
4. thorn

Q. Match the following:

$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ \text{A.}& \text{Stem}& I& \text{Spinach}\\ \text{B.}& \text{Root}& II& \text{Carrot}\\ \text{C.}& \text{Leaf}& III& \text{Potato}\end{array}$

1. A-II, B-III, C-I​
2. A-I, B-III, C-II​
3. A-I, B-II, C-III​
4. A-III, B-II, C-I​

Q.

In Nepenthes, the pitcher is a modified:

1. Leaf

2. Flower

3. Stem

4. Branch

Q.

How do the following modifications of leaves help the plant?

a. spines

b. tendrils

c. scales

Q. Which of the following root is consumed as food?

1. Potato
2. Radish
3. Pumpkin
4. Wheat

Q.

Where does the lateral branch originate from in the banana?

Q. Match the following:

$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ \text{A.}& \text{Stem}& I& \text{Spinach}\\ \text{B.}& \text{Root}& II& \text{Carrot}\\ \text{C.}& \text{Leaf}& III& \text{Potato}\end{array}$

1. A-I, B-III, C-II​
2. A-I, B-II, C-III​
3. A-III, B-II, C-I​
4. A-II, B-III, C-I​

Q. This is the main function of the leaf

1. exchanging gases
2. manufacturing food
3. anchoring plant
4. no function

Q. Draw the figure of a plant to show the parts, namely, the root, stem and leaves in it.

Q. Leaves arise from the ______ on a stem.

1. leaf base
2. bud
3. petiole
4. nodes

Q.

Photoperiod affect the ________________

Q. Alex is measuring the distance between two points of branching on a stem . He is measuring:

1. Length of midrib
2. Length of shoot
3. Length of petiole
4. Length of internode

Q. In one plant, underground stems are modified to store food and in another plant, the stem tendrils develop from axillary buds to help plant climb. They are

1. Ginger, Cucumber
2. Carrot, Jasmine
3. Sweet Potato, Bougainvillea
4. Cactus, Water hyacinth
5. Sweet Potato, Mint

Q.

Some plants have spines present in them, so how can we know which type of root does the plant has

Q.

Give two examples for each of the following: plants whose leaves are modified to store food.

Q.

In pitcher plant, which part of the leaf is modified into the pitcher?

1. petiole

2. lamina

3. midrib

4. veins

Q. This is the main function of the leaf

1. exchanging gases
2. manufacturing food
3. anchoring plant
4. no function