I need help now Which of the following has the greatest effect on climate?

A. photosynthesis

B. ozone depletion

C. greenhouse effect

D. smog

Complete the possible outcomes for each generation in the pedigree chartaa aa aa

The transport tubes for food coming down the plants are called?

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.