Primary and secondary structure of plant body

............ are pore like opening present on surface of the stem.

• Lenticels

• Vascular bundles

• Casparian strips

• Mesophyll cells

Scattered vascular bundles are present in ................

• Mango leaf

• Maize root

• Sunflower leaf

• Maize stem

Radial type of vascular bundles are present in ..............

• Mango leaf

• Maize root

• Sunflower leaf

• Maize leaf

The band like structure present in the radial and transverse walls of the endodermal cells are called..............

• Casparian strips

• Xylem

• Phloem

• Pericycle

Vascular bundles surrounded by a sheath is called as ...............

• Bundle sheath

• Leaf sheath

• Endodermis

• Pericycle

In maize leaf ........... Patches of sclerenchyma are present above and below the large vascular bundles.

• One

• Two

• Three

• Four

Tetrarch vascular bundles are present in...............

• Sunflower root

• Sunflower stem

• Maize stem

• Maize root

Increase in the girth or thickness of stem or root is known as.............

• Medullary rays

• Secondary growth

• Primary growth

• None of these

When the secondary growth shows deviation in normal secondary growth it is known as........................ Secondary growth.

• Abnormal

• Normal

• Regular

• Irregular

In Bignonia the secondary growth takes place due to the abnormal behaviour of normal................

• Xylem

• Phloem

• Cambium

• Parenchyma