Smaller teeth and jaws are due to genetic variation, which occurred by mutations (errors in DNA replication) and were selected to fill a suitable niche.
<h3>What is evolution?</h3>
Evolution is the mechanism of change of one species to adapt given environment, whereas mutations are the raw material for evolution.
In this regard, scientific evidence supports the fact that jaws evolved to become shorter in humans and thus adapt to a pastoral lifestyle.
In conclusion, smaller teeth and jaws emerged by mutations and were selected to fill a suitable niche.
Learn more about human evolution here:
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Ocean basins<span> are those areas found under the sea. They can be relatively inactive areas where deposits of sediment slowly collect or active areas where tectonic plates meet. Learn how </span>ocean basins<span> form and about features such as </span>oceanic<span> ridges and trenches</span>
The heterozygous for three characteristics have 9 possible genotypes.
<u>Explanation:</u>
There are three types of genotypes. The homozygous dominant (AA), Homozygous recessive (aa) and heterozygous (Aa). Genotypes are the specific combination of alleles present in the individual. Genotypes are the genetic makeup of the cell and it is the genetic identity of an individual. Heterozygous means combination of particular alleles.
Genotypes are normally expressed in capital and small letters. When heterozygous three characteristics in genotype link with each other according to Mendel’s law produce offspring of nine different characteristics.
Answer:
child birth creates all movement of the body generates heat provides a frame stores minerals and protects abdominal organs
Explanation:
That should be correct
