Nondisjunction causes errors in chromosome number, such as trisomy 21 (Down syndrome) and monosomy X (Turner syndrome). It is also a common cause of early spontaneous abortions.
Ultraviolet light can cause thymine dimers, potentially creating a mutation that could lead to cancer.
<h3>What Causes Thymine Dimers ?</h3>
In a single POLYNUCLEOTIDE CHAIN a pair of THYMINE residues that have become chemically bonded by the action of ULTRAVIOLET LIGHT. The lesion can inhibit DNA replication unless repaired.
Pyrimidine Dimers or thymine dimers are usually covalent links between adjacent pyrimidine bases on the same strand of DNA.
Thymine dimers distorts the DNA shape and prevents the accurate copying of DNA, which causes mutations.
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Three layers. The epidermis is the top layer of skin. This layer is for making new skin cells, provides a waterproof barrier, gives skin its color and is your protective layer. The dermis which is responsible for supply blood to your skin, hair growth, and the production of sebum (oil) and sweat. Lastly, the hypodermis which is basically made of connective tissue and fat and good for regulating your body temperature (1, 2, 3).
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A)Flocking provides aerodynamic efficiency and schooling provides hydrodynamic efficiency.
<span>Successive decomposition of dead material and modified organic matter results in the formation
of a more complex organic matter called humus. As they
break down the organic matter, any excess nutrients are
released into the soil in forms that plants can use.</span>
