Darwin studied actual birds on the Galapagos Islands instead of using a simulation, List at least three possible
challenges Darwin might have faced.

The double bond between a carbon atom and two oxygen atoms (a molecule of carbon dioxide) has two characteristics. what are they? a.an ionic bond is formed between the oxygen and carbon atoms. b.four valence electrons are shared. c.two valence electrons are shared. d.valence electrons are shared between oxygen atoms.

Need with these questions . need the answers in a rush for these questions are the answers i put down are correct or not? ?

In the diagram below, which organelle is a ribosome, which combines amino acids and produces proteins? оооо