PrepBharat

1. The cells of secondary cortex are
a) Parenchymatous
b) Sclerenchymatous
c) Collenchymatous
d) Meristems

View Answer

2. Bark refers to
a) Periderm
b) Secondary phloem
c) Both (a) and (b)
d) None of these

View Answer

3. At certain region, the phellogen cuts off closely arranged parenchymatous cells on the outer side instead of cork cells. These parenchymatous cells soon rupture epidermis, forming a lensshaped opening called
a) Hydathodes
b) Stomata
c) Lenticels
d) none of these

View Answer

4. Which of the following is correct about lenticels?
a) It is present in most of the woody trees
b) It helps in gaseous exchange
c) It is formed by the activity of phellogen
d) All of these

View Answer

5. In dicot root, the vascular cambium is
a) Completely primary in origin
b) Partly primary and partly secondary
c) Completely secondary in origin
d) none of these

View Answer

6. Initially formed cambium in dicot root is
a) Circular
b) Rectangular
c) Oval
d) Wavy

View Answer

7. Secondary growth occur in
a) Dicot root
b) Dicot stem
c) Stem and root of gymnosperm
d) All of these

View Answer

8. Which of the following is incorrect?
a) Wood is actually a secondary xylem.
b) Different type of woods are found on basis of their composition and time of production.
c) Monocot and dicot show marked variation in their internal structure.
d) Increase in girth of dicot stem by vascular cambium only.

View Answer

9. Main functions of plant tissues are
a) Assimilation of food and its storage
b) Transportation of water, mineral and photosynthates
c) Mechanical support
d) All of these

View Answer

10. Cambium causes growth in
a) Circumference
b) Width (diameter)
c) Leaves
d) Length

View Answer