Animalscaretips
- What is Megaphyll Fern?
- What is the difference between a Megaphyll and microphyll?
- What did the Megaphyll evolve from?
- Where are megaphylls found?
- Does Moss have Megaphyll?
- What is a fern frond?
What is Megaphyll Fern?
A type of foliage leaf in ferns and seed plants that has branched or parallel vascular bundles running through the lamina. The megaphylls of ferns are large pinnate leaves called fronds. A megaphyll was formerly called a macrophyll. Compare microphyll.
What is the difference between a Megaphyll and microphyll?
Microphylls are defined as leaves of small size, with simple venation (one vein) and associated with steles that lack leaf gaps (protosteles). By contrast, megaphylls are defined as leaves of generally larger size, with complex venation and associated with leaf gaps in the stele [3].
What did the Megaphyll evolve from?
According to the telome theory, megaphylls evolved from the three-dimensional lateral branches of early vascular land plants in a hypothetical series of three transformations; first, the formation of determinate lateral branches (overtopping); second, the development of 'flattened' branch systems (planation); and third ...
Where are megaphylls found?
Megaphylls are seen in ferns and more derived vascular plants. In addition to photosynthesis, leaves play another role in the life of the plants. Pine cones, mature fronds of ferns, and flowers are all sporophylls—leaves that were modified structurally to bear sporangia.
Does Moss have Megaphyll?
Club mosses differ from other vascular seedless plants due to the presence of microphylls, very small leaves that only have a single vein. Most other plants have megaphylls, leaves with more than one vein. Like all vascular plants, club mosses reproduce via alternation of generations.
What is a fern frond?
The leaves of ferns are often called fronds. Fronds are usually composed of a leafy blade and petiole (leaf stalk). ... Parts of a fern leaf. The midrib is the main axis of the blade, and the tip of the frond is its apex. The blade may be variously divided, into segments called pinnae; single leaflets are pinna.
