One reason for the early success of reptiles was that a. reptiles could reproduce away from water.
Photosynthesis. Oxygen<span> is a by-product of the photosynthetic </span>process<span>.</span><span> The light-dependent reactions use H 2 O and </span>produce<span> O 2.</span>
Answer:
unaligned chromosomes that not equal to daughter cells
Explanation:
Answer:
Explanation:
DNA mutations could be silent and have no effect, others affect protein synthesis. Mutation is a change in a DNA sequence brought about either by a mistake made when the DNA is copied or through chemical damage.
A point mutation is a single-letter swap – an exchange of two bases, adenine to cytosine, for example, at a single location in the DNA molecule. Since the sequence of letters in a gene determines the sequence of amino acids in the protein it encodes, a point mutation can change the amino acid sequence of the resulting protein. Sometimes a change in the protein's amino acid sequence can have dramatic results. For example, sickle cell disease occurs when a single-point mutation in the gene that encodes the hemoglobin molecule results in deformed red blood cells.
