Genes have two alleles.
Some genes have a variety of different forms, which are located at the same position, or genetic locus, on a chromosome. Humans are called diploid organisms because they have two alleles at each genetic locus, with one allele inherited from each parent. Each pair of alleles represents the genotype of a specific gene.
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B. processes to make them take longer than a human's lifetime
Lyosome is an organelle that contains enzymes that breakdown and digest unneeded cellular components, such as damaged organelles.
Speciation! Speciation occurs when a single species becomes two or more separate populations by a geographical barrier. This changes each population’s environment which forces them to adapt. Eventually these populations will become so different from each other that they will not be able to interbreed populations and create fertile offspring. This is what makes them different species, but they still share a common ancestor.
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ancient organism remains, fossil layers, similarities among organisms alive today, similarities in DNA, and similarities of embryos.
