36. occurs only in vascular plants which have microspores and megaspores are the

Question

36. occurs only in vascular plants which have microspores and megaspores are the are the colorless root like projections of mosses, liverworts and hornworts, which anchor them to the substrate 38. The first plants clearly evolved from an organism if it be classified as a multicellular green 39. Fungi, together with bacteria are the principaln the biosphere 40. The tropical diseases such as sleeping sickness, East Coast fever, Chagas's disease and leishmaniosis are caused by 41. Genetic diversity in bacteria is influenced by mutation and 42. Warm-blooded vertebrates are also calledbecause they can maintain a constant body by circulating blood through blood vessels just under the epidermis 43. The cardiac output is the volume of blood pumped by eachper minute. were the first vertebrates to completely master the challenge of living on dry land. 45. composed. 46. Sharks and bony fishes replaced the primitive fishes because of their superior design for 47. In a stimulated muscle fiber, the calcium ions released by the sarcoplasmic reticulum binds to the protein -is the material of which the skeleton of chondricthes is 48. Animal locomotion is accompanied through the force of muscles acting on a rigid system 49. Stomata open when their guard cells become 50.- _are unicellular, photosynthetic organisms with chloroplasts, and double shells made of silica.

Explanation / Answer

36. Seeds only occurs in vascular plants. They are also known as tracheophyta which have microspores i.e male gametes and megaspores i.e female gametes. They are higher plants also have lignified tissue for conduction of water and minerals throughout the plants.

37. Rhizoids are the colorless rootlike structure.

They are filamentous outgrowth, which not only anchor the plants but also helps in conduction of water. In liverworts they are unicellular but in mosses they are multicellular.

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