1.How can evolution explain the formation of complex structures such as the eye
ID: 49796 • Letter: 1
Question
1.How can evolution explain the formation of complex structures such as the eye or the flagella motor?
2.What causes variation in a species? To put this another way: all humans have the same genes, yet we do not look alike. What is the reason for the phenotypicdifferences between individuals of the same species? What is genetic recombination?
3. What are the dangers of small populations of a species from a genetic and evolutionary standpoint? What is the bottleneck effect?
4.. How does speciation occur? What is the importance of geographic isolation? How is this illustrated in the Galapagos?
5. What is Darwinian Medicine and how does it help us better understand medical conditions?
Explanation / Answer
1.)
Steps for evolution of eye
The earliest predecessors of the attention were photoreceptor proteins that senses light-weight, found even in unicellular organisms, referred to as "eyespots".
Early eyes :
Basic processing of light unit of eyes is photoreceptor cell, a specialised cell containing 2 kinds of molecules during a membrane: the protein, a sensitive supermolecule, encompassing the chemical group, a pigment that distinguishes colours.
Lens formation and diversification
In a lensless eye, an overseas purpose of sunshine enters and hits the rear of the attention with regarding an equivalent size as once it entered. Adding a lens to the attention directs this incoming light-weight onto a smaller area, while not reducing the intensity of the input.
Other developments
Colour vision
Location
Polarization vision
Focusing mechanism
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