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Rachis is defined as?
Rachis is an extension of a compound leaf or it can be main stem of a compound leaf.
What is the central cylinder of a feather?
rachis
This structure branches off from the rachis and is similar to branches in a tree?
barb
What is the rib or shaft of a feather?
A feather has a main shaft, called the rachis.
Use a table to compare the lifecycles of 3 phyla of bryophytes?
the rachis of a fern
What are the name of the tiny hooks that weave together in a feather?
the Rachis is the central part of the feather, Barbs branch of the Rachis, Barbules branch off the Barbs and Barbicels (Hooks) branch off the Barbsbarbules
How would you differentiate the rachis of a compound leaf from branch?
is that rachis is (botany) the main shaft of either a compound leaf, head of grain, or fern frond while branch is the woody part of a tree arising from the trunk and usually dividing.
How does the structure of the rachis fit its functions?
The rachis, the central shaft of a feather, has a lightweight yet sturdy structure that supports the vanes while allowing for flexibility and aerodynamic efficiency. Composed of a hollow, keratin-based material, it minimizes weight without sacrificing strength, enabling birds to achieve flight with agility. Additionally, its segmented design provides attachment points for barbs, which create the necessary surface area for lift and insulation. Overall, the rachis's structure is optimally adapted to enhance the feather's primary functions of flight and temperature regulation.
Sections of a compound leaf called?
The sections of a compound leaf are known as leaflets. These leaflets are attached to a common stalk called a rachis. Compound leaves can be either pinnately compound, with the leaflets arranged along the rachis like a feather, or palmately compound, with the leaflets arranged like the fingers of a hand.
What are the parts of a contour feather?
Contour feather is the largest feather of a bird. It has 7 basic part and they are the Calamus, Rachis, Vane, Barbs, Barbules, Hooklets, and the Afterfeather.
Is wood apple leaf is compound leaf?
In woodapple the leaf is compound. It is generally trifoliate.
How can compound leaves be identified?
Compound leaves can be identified by their multiple leaflets attached to a single leaf stem, called a rachis. Each leaflet has its own stalk, called a petiole, and together they form a larger compound leaf structure.
