Question

40. Although both algae and mosses are well adapted to survive severe dehydration for extended periods, they differ in the mechanisms of how this feature is achieved. While algae store water for extended periods in the …………………………………….. of their cell walls, bryophytes use …………………………………………………. situated ……………………………………………. to achieve the same goal.

41. Name the two plants (genus suffices) that are directly known as “resurrection plants”.

42. Name the areas where bryophytes establish the dominant vegetation!

43. The Pteridophyta or fern group is a division of plants that in addition to the true ferns includes the classes ……………………… , …………………………., ………………………, ……………………………, ………………………………..

44. The first forests on earth were neither conifer nor hardwood forests, the were made of members of the ……………………… A famous tree was Calamites belonging to the Pterodphyte class of ………………………………………, A famous tree was Lepidodendron belonging to the Pterodphyte class of ………………………………………,

45. The phylogenetically oldest pteridophytes are the ……………………………. . These plants consist of a …………………….. as the only organ in addition to attached sporangia.