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They consist mainly of iron-nickel metal with small amounts of sulphide and carbide minerals. During the decay of radioactive elements in the early history of the solar system, many asteroids melted and the iron they contained, being dense, sank to the centre to form a metallic core.
Explanation:
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His parents maybe a having the genotypes of GG and Gg. Galactosemia is a dominant allele so whoever gets the dominant allele, that person is positive to the disorder. Having a parent who is dominant homogeneous alleles crossed by a carrier could have a higher probability to have a child who will inherit this gene.
The distribution of sunlight
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Urbanization has environmental and economic advantages for humans, but also substantial disadvantages, including increased problems with physical and mental health/stress, a modified climate, water and energy management, and air pollution.
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The animal cells produce the collagen but the plant cell does not produce collagen that responsible for producing the complex structure of protein and carbohydrates that is called extracellular matrix cell. Collagen is an important protein that provides strength to the structural integrity. On the other hand, the plant has not collagen so they have their extracellular supportive structure. The cell wall is so rigid and covered by the cell that protects it that provides shape and support to it. The plant cell also made up of molecules and these are called cellulose. These cellulose structured into the fibers that are called micro-fibrils