Next, several biochemical tests are run to further identify the microorganism. Lactose fermentation is run for 24 hours at 37⁰c in lactose broth containing a durham tube and phenol red indicator. The result shows a red broth with no air bubbles in the durham tube.

What kinds of antigens are found on the rbcs of a person with a+ blood

In the image, layer a is the topmost layer. layer c contains fossils from the precambrian era. layer b contains dinosaur fossils, and layer a contains fossils of mammals. which two statements are supported by this evidence? 1. mammals lived before the precambrian era. 2. dinosaurs and mammals existed in the precambrian era. 3. dinosaurs evolved after precambrian organisms. 4. precambrian organisms evolved after dinosaurs. 5. precambrian organisms were the first life-forms to become fossilized, according to this sample.

Iknow this isn't a question, but is there someway to ask a question under public safety or is there no category for it? i don't know if i'm overlooking it or not.