Point mutations are those that alter a single base pair or base location, and include substitutions and frameshift mutations. they can range in severity from no phenotypic change to complete loss of function. rank the following point mutations in order of least damaging to most damaging if they occur in the middle of the coding sequence of a polypeptide. view available hint(s)

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.

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leaves enable photosynthesis to occur. photosynthesis is the process by which leaves absorb light and carbon dioxide to produce glucose (food) for plants to grow. leaves are adapted to perform their function, eg they have a large surface area to absorb sunlight.

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