Each bone has a humerus. The ones that have these bones are humans, lions and birds
Answer:
All cells require at least some of the molecular machines that you see in the video above, Engineering is one field where information about how physics and chemistry are used to create machines that use coded information to control their functions, Biology is the other. There are no other known systems that use coded information to do anything at all. And of course our genetic code causes the construction of programmable metabolic pathways that allow cells to adapt to their environment in real time, and epigenetics pathways that allow long term adaption. We don't compare biology to human engineered technology out of laziness but because it's the only known comparable phenomenon.
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Answer AND Explanation:
<u>FACTORS THAT CAUSE GENETIC VARIATIONS</u>
- Crossing over. At the chiasmata during prophase I of meiosis, breakage may occur and exchange of genetic information may take place. New gene combinations which result in variations.
- Independent assortment. The arrangement of homologous chromosomes at the equator of the spindle during metaphase of the first meiotic division is random. These homologous chromosomes segregate into different daughter cells which contain different genetic combinations which brings about variation
- Fertilisation permits parental genes to be brought together in different combinations. This is the cause of variations in members of the same family.
- Mutation is the spontaneous change in the genetic makeup of an organism. These changes may be inherited by the offspring therefore beginning variation.
