Answer:
They have a backbone, most use legs,wings,or fins for movement.
<span>No, it does not mean that the interpretation or design of the first experiment was wrong. What it could mean is that using unboiled water or the lack of paraffin was not the catalyst that caused the carbon dioxide to be produced.</span>
Cross contamination means the transfer of pathogens from surface to another
Semen is the thick fluid that contains the sperm that is basic in nature, thus protecting it from the acidic nature of the vagina.
Organisms that use oxygen need it for cellular respiration, in which energy is released from glucose. Energy is needed by the organism for growth, mobility and reproduction.
