Which term would be applied to a regulatory condition that occurs when protein is associated with a particular section of dna and greatly reduces transcription?

Galileo was the first to notice that the moon has craters, valleys, and mountains. how might this have changed people's perception of the moon at the time?

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

Apebble is thrown into a calm lake, ripples are formed from the center and move outward. the water particles in the lake travel in a circular pattern that moves up and down on the surface of a lake, and the energy travels a) diagonally. b) downward. c) horizontally. d) upward.