Question

Which statement(s) is/are true?
(a) Open vascular bundles are found in dicot stem.
(b) Porous wood is found in Pinus.
(c) Cortex is made up of only parenchymatous cells.
(d) Passage cells are found in endodermis of orchid roots.

• A. a and b
• B. b and c
• C. c and d
• D. a and d

Answer 1

The correct option is D a and d

Open vascular bundles are found in dicot stem whereas closed vascular bundles are found in monocot stem.

Non-porous wood is present in gymnosperms such as Pinus and porous wood is present in angiosperms. Gymnosperms wood is non-porous because it lacks vessels.

A cortex is an outer layer of a stem or root in a planet, lying below the epidermis but outside the vascular bundles. The cortex is composed mostly of large thin-walled parenchyma cells but the outer hypodermis of the cortex region consists of a few layers of collenchyma or sclerenchyma cells.

Passage cells are found in endodermis of monocot roots. Orchids are monocot plants. Hence, passage cells are found in endodermis of orchid roots.