first left (up) trachea
first left (down) diaphragm
right (up) bronchiole
right (down) alveolus
Mitochondrial DNA (mtdna) recovered from a fossil hominin from sima de los huesos in northern spain shows connections to the mtdna of the Denisovans.
The Sima de los Huesos showed distinctive proof of DNA survival over an extended period of time. Based on the enzymatic amplification of a few short mitochondrial DNA (mtDNA) fragments from Middle Pleistocene cave bear bones. Given that the Sima de los Huesos fossils have Neanderthal-derived characteristics (such as in their dental, mandibular, midfacial, supraorbital, and occipital morphology), it is unexpected that the mtDNA from these fossils has a common origin with Denisovan rather than Neanderthal mtDNAs.
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It contracts and relaxes!
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Binary fission refers to the type of asexual reproduction. It is the most general kind of reproduction in prokaryotes like bacteria. It takes place in some unicellular cells like Paramecium and Amoeba.
