Entrance Exams
Govt. Exams
Vascular cambium produces secondary xylem and phloem, while cork cambium produces cork and secondary cortex, together contributing to secondary growth.
According to the histogen theory, the calyptrogen (root cap mother region) produces the root cap, while dermatogen produces epidermis, periblem produces cortex, and plerome produces stele.
Insectivorous plants have anatomically modified leaves (pitchers, traps) with specialized glandular and digestive tissues to trap and digest insects.
The stele consists of pericycle, vascular tissues, and endodermis. The cortex lies outside the endodermis and is not part of the stele.
Petioles contain multiple vascular bundles arranged in characteristic patterns - often arc-shaped or scattered, providing strength and flexibility.
Angiosperm xylem consists of vessels (main conducting element), tracheids, xylem parenchyma (storage), and xylem fibers (support).
Collenchyma provides mechanical support with flexibility but does not transport water and minerals; that function belongs to xylem.
The cork cambium originates from the endodermis or outer cortical cells and produces cork and phelloderm as part of the periderm.
Aerenchyma is specialized parenchyma with large air spaces that provides buoyancy and allows diffusion of gases in hydrophytes.
Desert plants (xerophytes) have smaller leaves, thicker cuticles, and often sunken stomata to minimize water loss through transpiration.