What initiates this cell to express the specific gene into mRNA?

an active transcription factor
a chemical signal that is specific to the receptor
any hormone released by the body
a phosphorylation cascade

pregnancy happens more and more

the missing space is phylum

glacial erosion, the picking up and movement of earth beneath a glacier, is also referred to as plucking. erosion and transportation of individual pieces of bedrock, especially large "joint block occur as a result of this glacial erosion. plucking is type of erosion in which rocks become frozen into the bottom and sides of the glacier.as the glacier moves downhill it 'plucks' the rocks frozen into the glacier from the ground.