Identity human and natural factors in the loss of biodiversity

What type of plant is good for a bioassay and where can i buy it? i only have a month.

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.

Which of these reproductive method is the only on available to mosses and fernsspores