Identify the following:
1. These plants belong to thallophyta and grow upto 100 meters in height.
2. Plants used to obtain a product which is used a solidifying agent in preparation of ice-creams and jellies.
3. Gymnosperm which has girth of about 125 feet.
4. Xerophytic fern which belongs to sphenopsida.
5. Unicellular motile alga which belongs to Chlorophyceae and shows cup-shaped chloroplast.
