Underground Stem Modifications

Q. What are Gemmae cups?

Q.

Which of the following plant parts in garlic onion is edible?

1. Underground stem

2. Fleshy scale leaves

3. Tunic

4. Adventitious roots

Q. Which of the following is a pair of modified stem and modified root respectively, for food storage?

1. Ginger and onion
2. Turmeric and garlic
3. Sweet potato and carrot
4. Banana and radish

Q.

Name two plants in which thorns can be seen.

Q.

___ is an example of an underground stem.

Q. Stems modified into flat green organs performing the functions of leaves are known as

1. Scales
2. Cladodes
3. Phyllodes
4. Phylloclades

Q.

What is bud dormancy?

Q.

Justify the following statements on the basis of external features:

(i) Underground parts of a plant are not always roots

(ii) Flower is a modified shoot

Q.

What type of stem modification is found in Zaminkand?

Q.

Which one of the following is correctly matched?

1. Onion - Bulb

2. Ginger - Sucker

3. Chlamydomonas - Conidia

4. Yeast - Zoospores

Q.

Describe modifications of the stem with suitable examples.

Q.

In which plant clinging roots can be found?

Q. How many plants among Canna, Oxalis, Eichhornia, ginger, garlic, lemon, wheat, Gladiolus and saffron have underground modified stems?

1. Three
2. Five
3. Six
4. Four

Q.

Which one of the following is correctly matched?

1. Chlamydomonas - Conidia

2. Yeast - Zoospores

3. Onion - Bulb

4. Ginger - Sucker

Q.

Ginger and sweet potato are modifications of

1. stem and adventitious root respectively

2. stem

3. root

4. stem and tap root respectively

Q.

What is the eye of potato?

1. Axillary bud

2. Adventitious bud

3. Apical bud

4. Accessory bud

Q. Which of the following is a pair of modified stem and modified root respectively, for food storage?

1. Ginger and onion
2. Turmeric and garlic
3. Sweet potato and carrot
4. Banana and radish

Q. The stem of potato, the root of carrot and bulb of onion

1. help in photosynthesis
2. both a and c
3. store food
4. are underground

Q.

Non-flowering plants reproduce by means of ______.

Q. The given diagram shows a potato plant forming new tubers. Which route would be taken by most of food at this time?

1. $1\to 4\to 2\to 3$
2. $6\to 5\to 2\to 3$
3. $1\to 4\to 5\to 6$
4. $6\to 5\to 4\to 1$

Q.

Ginger and sweet potato are modifications of

1. Stem

2. Root

3. Stem and tap root respectively

4. Stem and adventitious root respectively

Q.

Nodes are important part of the stem because

1. It helps in vegetative propagation

2. It is the point of leaf growth

3. It marks the end of the stem

4. It is necessary for stem growth

Q.

Why is a thorn modified branch?

Q. What is a trichome?

Q. The stem of potato, the root of carrot and bulb of onion

1. are underground
2. help in photosynthesis
3. store food
4. both a and c

Q.

Taking an example of a plant, explain that stems are modified for making food in some plants.

Q.

What is an example of red algae?

Q. Trichomes take part in

1. Protection and reduction of transpiration
2. Transpiration and exchange of gases
3. Exudation of water drops
4. Desiccation

Q. State whether the following are true or false.​

Bean is a monoecious plant.​

1. True
2. False

Q. Hormogonia are the vegetatively reproducing structure of

1. Oscillatoria
2. Ulothrix
3. Chlamydomonas
4. Spirogyra