Organisms need energy to conduct essential life activities
Answer: D.
ionic: transfer of electrons
Water vapor, steam, water in gas form.
Blood flows from the right atrium into the right ventricle through the tricuspid valve. When the ventricle is full, the tricuspid valve shuts to prevent blood flowing backwards into the atrium. Blood leaves the heart through the pulmonic valve into the pulmonary artery and flows to the lungs.
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The answer is: D four haploid gametes
