Question No:1

Peripheral region of secondary xylem, which is light in color, is known as

[A] heartwood (duramen)
[B] sapwood (alburnum)
[C] spring wood
[D] autumn wood



Question No:2

The cells of secondary cortex are

[A] parenchymatous
[B] sclerenchymatous
[C] collenchymatous
[D] meristems



Question No:3

Bark refers to

[A] periderm
[B] secondary phloem
[C] both
[D] none



Question No:4

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 lens-shaped opening called

[A] hydathodes
[B] stomata
[C] lenticels
[D] none



Question No:5

Which of the following is correct about lenticels?

[A] It is present in most woody trees
[B] It helps in gaseous exchange
[C] It is formed by activity of Phellogen
[D] All



Question No:6

In dicot root vascular cambium is

[A] completely primary in origin
[B] partly primary and partly secondary
[C] completely secondary in origin
[D] none



Question No:7

Initially formed cambium hi dicot root is

[A] circular
[B] rectangular
[C] oval
[D] wavy



Question No:8

Secondary growth occur in

[A] dicot root
[B] dicot stem
[C] stem and root of gymnosperm
[D] all



Question No:9

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 tune of production
[C] Monocot and dicot show marked variation in their internal structure
[D] Increase in girth of dicot stem by vascular cambium only



Question No:10

Main functions of plant tissues are

[A] assimilation of food and its storage
[B] transportation of water, mineral and photosynthesis
[C] mechanical support
[D] all



Question No:11

Cambium causes growth in

[A] circumference
[B] width (diameter)
[C] leaves
[D] length



Question No:12

The function of cork cambium (Phellogen) is to produce

[A] cork and secondary cortex
[B] secondary xylem and secondary phloem
[C] cork
[D] secondary cortex and phloem



Question No:13

Other names of secondary cortex, cork cambium and cork are

[A] phellem, phelloderm and Phellogen
[B] Phellogen, phellem and phelloderm
[C] phelloderm, Phellogen and phellem
[D] Phellogen, phelloderm and phellem



Question No:14

In dicot roots, vascular cambium is derived from

[A] epidermis
[B] hypodermis
[C] cortex
[D] Pericycle