Cambium Rings

Q.

Secondary growth is due to

1. Lateral meristem

2. Apical meristem

3. Intercalary meristem

4. All of the above

Q.

Maximum activity of cambium is in

1. spring

2. very cold region

3. all of these.

4. Autumn

Q.

Given the diagram of L.S of a part of bark region of plant. Choose the answer with the correct combination of parts and alphabets.

1. A = hydathode, B = epithem, C = phellem, D = phellogen, E = phelloderm.

2. A = lenticular opening, B = cortex, C = phellogen, D = phellem, E = phelloderm

3. A = stoma, B = secondary cortex, C = phellem, D = phellogen, E = phelloderm

4. A = lenticular opening, B = complementary cells C = phellem, D = phellogen, E = phelloderm.

Q.

Which of the following is not a product of secondary growth activity of a plant?

1. Pith

2. Lenticel

3. Cork

4. Heartwood

Q. The cambial activity is maximum in _______ and minimum in _________ season respectively.

1. winter, summer
2. spring, winter
3. autumn, spring
4. winter, autumn

Q. Which among the following is not formed as a result of redifferentiation process?

1. Secondary xylem
2. Interfascicular cambium
3. Phellem
4. Phelloderm

Q.

What constitutes the cambial ring?

Q.

A transverse section of the trunk of a tree shows concentric rings which are known as growth rings. How are these rings formed? What is the significance of these rings?

Q. Sea shore trees do not show annual rings because

1. There is little climatic variations.
2. They belong to monocots.
3. There is enough moisture.
4. Soil is sandy.

Q. Which of the following is responsible for the growth in circumference or girth of stem and root in plants (in crucifers)?

1. Phloem
2. Xylem
3. Cortex
4. Cambium (meristematic tissue)