1. some yeast, sugar and water are mixed in a test-tube.
the test tube starts bubbling after one hour.

which process causes this change?
a growth
b reproduction
c respiration
d sensitivity

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.

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus