Ask a Teacher



One specific feature of its phylum: (1) Spirogyra (2) Agaricus (3) Moss (4) Fern (5) Pinus (6) Angiosperms (7) Earth worm (8) Cockroach (9) Bony fish (10) bird.

 The cell walls of all spirogyra have two walls that contain pectin and cellulose.
Agaricus is in a form of an umbrella.  The head part is red-brown in color and large and the stem is grayish and thick and long.  It is mostly found in the highlands located in suburban Sao Paulo.
Mosses have a multicellular rhizoid, a root-like subterranean tissue that absorbs water and nutrients from the soil.
Spore-producing ferns (the one we usually see) are asexual and consist of basic roots, stems and fronds (leaves). The fronds often consist of leaflets referred to as pinnae. On some or all of the leaves, or sometimes on just one specialized portion of a special leaf, are the structures called sporangia. These are usually clustered into groups called sori, which are the visible dark round things on the bottom of the fronds. Sometimes the sori are protected by flaps or disk structures called indusia, or covered by the rolled over edge of the pinnae.
 Pines have acicular-shaped leaves, commonly called needles. Needles mostly occur in fascicles of 2 to 8, except Pinus monophylla, in which they usually occur singly. The fascicle sheath is comprised of bud scales which can be either deciduous or persistent.

The seed cone usually matures in 2 (rarely 3) years.




comments powered by Disqus