What are the roles of allolactose in the lac operon and tryptophan in the trp operon? allolactose acts as an inducer and tryptophan acts as a corepressor. allolactose acts as a corepressor while tryptophan acts as an inducer. allolactose acts as a repressor and while tryptophan acts as a promoter.

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 menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.

the fossil record provides evidence of a common ancestor to many species.