Which one of the following comprises only simple tissue?

1. Parenchyma, Collenchyma and Sclerenchyma

2. Parenchyma, Xylem and Collenchyma

3. Parenchyma, Xylem and Sclerenchyma

4. Parenchyma, Xylem and Phloem

Match the following

1. A-i, B-iii, C-v, D-ii, E-iv
2. A-iii, B-i, C-ii, D-v, E-iv
3. A-ii, B-iv, C-v, D-i, E-iii
4. A-v, B-iv, C-iii, D-ii, E-i

The desert grasses, often curls their leaf to minimise water loss due to presence of 

Match the Column I and II.

        A  B  C  D
1.   1   2  3   4
2.   3   1  2   4
3.   4   1  2   3
4.   4   3  2   1

Select the correct pair amongst the following.
(1) Spring wood  - light colour, high density

(2) Spring wood  - dark colour, low density

(3) Autumn wood - light colour, high density

(4) Autumn wood - dark colour, high density

Root cambium is derived from?

(1) primary meristem

(2) secondary meristem

(3) intercalary meristem

(4) apical meristem

Tyloses are balloon-like outgrowths in the lumen of secondary xylem tracheids and vessel of duramen region. These are actually:-

As secondary growth proceeds, in a dicot stem, the thickness of.

(1) sapwood increases

(2) heartwood increases

(3) both sapwood and heartwood increases

(4) both sapwood and heartwood remains the same

Pith cavity occurs in the stem of ?
(1) Helianthus

(2) Zea mays

(3) Cucurbita   

(4) Dracaena