Question

Other names for cork, cork cambium and secondary cortex are
A. Phloem, phellogen, and phelloderm
B. Phellogen, phellem, and phelloderm
C. Phelloderm, phellem, and phellogen
D. Phelloderm, phellogen, and phellem

Answer 1

Hint: Cork is a buoyant material present in a particular layer of bark tissue. It is harvested for its commercial use. Cork cambium forms the epidermis of the vascular tissues in plants. It also forms a layer of bark. Below the epidermis is the outer layer of stems called the secondary cortex.

Complete answer: The plants are specialized organisms having various specialized parts present for particular functions. The cork is a buoyant tissue present in the layer of the bark of the plant. Thus, it is also called phelloderm. It is used commercially in various processing units. It is made up of suberin which is a hydrophobic substance that makes cork an impermeable substance. It is generally used as wine stoppers due to its elastic and impermeable properties. Cork cambium is tissue present in vascular plants that have conducting tissues. It forms a part of the epidermis. It forms one of the layers of bark of a tree. It is present between the cork and the primary phloem which is conductive tissue. It is responsible for secondary growth which replaces the epidermis in stems and roots. It is generally found in woody plants. It is also called bark cambium, pericambium, and phellem. The secondary cortex is derived from the cortex. The cortex is the outer layer of a stem or root. It lies below the epidermis and outside the vascular tissue system. It is also called phellogen. Thus, we can conclude that cork, cork cambium, and secondary cortex are called phelloderm, phellem, and phellogen respectively.
So, the correct answer is option C.

Note: The plants grow in the primary growth phase and secondary growth phase. The primary growth refers to longitudinal growth that increases in the length of plants. The secondary growth refers to the increase in the width of plants. The secondary growth is the thickness of plants.