Osteogenesis imperfects is a genetic disorder in which a person has very fragile bones due to the lack of collagen. In order to study the disease effectively, the defective gene is inserted into the nucleus of mice embryos so that they will develop the disease.

answer: tributaries flow into rivers.

wetland is a biome that develops when the water gets accumulated in a land exhibiting a huge depression. these form either seasonally or permanently. the water in the wetland comes from rivers, lakes, ocean, flood, rain or other sources. the wetlands includes mangroves, marshes and peatland.

tributaries flow into the rivers develops a wetland because such water will get deposited in the depression and will restrict the original flow of tributary water. hence, water with low drainage current combines with the river water.