Reverse transcriptase synthesizes

Transpiration is the evaporation of water from

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.

How do the sperm cells get from the stigma to the ovules?