Evolution appears directional if we view the fossil record’s progress from simple unicellular creatures to multicellular ones, then invertebrates, dinosaurs, mammals and humans. This is supported by certain biologist’s who argue evolution favours the directional development of complex life .
However, life is not a straightforward progression towards complexity. Natural selection can’t explain revolutionary change because while species produce evolutionary trends through their adaptive challenges, there are random events such as mass extinctions that dramatically alter the progress of life.
Life on earth emerged from a series of fortuitous accidents. The distance of the Earth from the Sun, the Moon’s tidal forces, the geomagnetic field that extends from Earth's interior into space, all support life. If any of them were different by the tiniest margin, life would not exist. Similarly, unpredictable events have influenced life’s progression and become catalysts for emerging complex life …show more content…
Bacteria had been in existence for billions of years however, 1.6bya during the Proterozoic era, we suddenly find the emergence of complex eukaryotic cells. All eukaryote cells share one common ancestor which emerged just once in 4 billion years of life on earth and all plants, protists, algae, animals and fungi are constituted by these cells. The cellular structure of bacteria and eukaryotes are so different there is no evidence to support the ‘directional’ evolution of eukaryotes from bacteria..
Biologists can’t explain eukaryote emergence only confirm their symbiotic capture of free living bacteria for energy purposes. Bacterial cells are many times smaller and have none of this eukaryote complexity. There was a quantum leap in evolution which saw eukaryotes emerge as a chimera in an abrupt transition already displaying their complex array of membrane and cellular
However, life is not a straightforward progression towards complexity. Natural selection can’t explain revolutionary change because while species produce evolutionary trends through their adaptive challenges, there are random events such as mass extinctions that dramatically alter the progress of life.
Life on earth emerged from a series of fortuitous accidents. The distance of the Earth from the Sun, the Moon’s tidal forces, the geomagnetic field that extends from Earth's interior into space, all support life. If any of them were different by the tiniest margin, life would not exist. Similarly, unpredictable events have influenced life’s progression and become catalysts for emerging complex life …show more content…
Bacteria had been in existence for billions of years however, 1.6bya during the Proterozoic era, we suddenly find the emergence of complex eukaryotic cells. All eukaryote cells share one common ancestor which emerged just once in 4 billion years of life on earth and all plants, protists, algae, animals and fungi are constituted by these cells. The cellular structure of bacteria and eukaryotes are so different there is no evidence to support the ‘directional’ evolution of eukaryotes from bacteria..
Biologists can’t explain eukaryote emergence only confirm their symbiotic capture of free living bacteria for energy purposes. Bacterial cells are many times smaller and have none of this eukaryote complexity. There was a quantum leap in evolution which saw eukaryotes emerge as a chimera in an abrupt transition already displaying their complex array of membrane and cellular