Inhibition of transcription by lac repressor involves its binding to the promoter a. true b. false

The images show fossils of a modern bird and two extinct organisms (a tyrannosaurus rex and an archaeopteryx). based on the structure of the three organisms, it can be concluded that . the archaeopteryx and bird have wings, while dinosaurs have limbs. so, it can be concluded that .

Explain why in any given geographical region, women tend to have lighter skins( by 3-4% on average) than men?

Which of the following represents a negatively charged ion? of t 7