20. The answer is 1 (Precambrian)
21. The answer is 4 (Pennsylvanian)
22. The answer is 2 (Bony Fishes, Dinosaurs, and Mammals)
23. The answer is 2 (Reptiles)
It would takes around 175 hours to walk 700 miles.
Answer:
The genetic modification variations result in the change in the genome of the organism. In this case, the variations result in expression of a trait in different form than usual. These variations results in genetic mutation, which can be inherited from one generation to another.
In sexual reproduction, the genome of the organism is not altered. In this only an exchange between the maternal and the maternal alleles takes place, these changes does not result in mutations.
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A way we can reduce disadvantages of human made materials is simply by finding new uses for them such as when plastic is molded and used for a container of a liquid.
