Down syndrome causes a distinct facial appearance, intellectual disability, developmental delays, and may be associated with thyroid or heart disease.
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Answer:
Natural selection is the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin and is now believed to be the main process that brings about evolution while Artificial selection is Selective breeding is the process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits by choosing which typically animal or plant males and females will sexually reproduce and have offspring together.
Green in color due to the chlorophyll used to absorb energy from the sun.<span />
Respiratory system<span>, the </span>system in living organisms<span> that takes up oxygen and discharges carbon dioxide in order to satisfy energy requirements. In the </span>living organism<span>, energy is liberated, along with carbon dioxide, through the oxidation of molecules containing carbon..
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