The nest is made of sticks and twigs and is usually high up in a tree. The breeding female will lay 3-6 eggs which will require 18 days of incubation, and an additional 35 days in the nest before the young crows are able to fly. Unlike many species of birds, American crows do not immediately leave their parents.
Etymology[edit] Probably derived from gusset. gussy up â(third-person singular simple present gussies up, present participle gussying up, simple past and past participle gussied up) (informal) To don fancy clothing; to dress up particularly in flattering or specially altered garments.
The GUS reporter system (GUS: Î²-glucuronidase) is a reporter gene system, particularly useful in plant molecular biology and microbiology.Several kinds of GUS reporter gene assay are available, depending on the substrate used. The term GUS staining refers to the most common of these, a histochemical technique.he GUS system is not the only available gene reporter system for the analysis of promoter activity. Other competing systems are based on e.g. luciferase, GFP, beta-galactosidase, chloramphenicol acetyltransferase (CAT), alkaline phosphatase.