The bladder is an organ in the excretory system. what is the function of the bladder? a. to take in oxygen and excrete carbon dioxide b. to break down food into useful nutrients c. to pump blood throughout the body d. to store urine until it can be excreted

92 sathe best for the question 11. most animals and plants reproduce sexually. this means that dna is passed down to new organisms from two parental organisms. which of the following is a key advantage of sexual reproduction?

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.

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