When humans started industrialization we cleared land that once was habitats for other animals and global warming started when we started using all of those fossil fuels cause all that gas don't go nowhere and if a volcano erupt the lava can cover the whole island which will start the ecological succession or a thunder storm when lightning hit the ground it can cause a forest fire.
Cells are the basic building blocks of life, which can join together to form tissues, while different groups of tissues join together to form organs. These organs are then connected together to form organ systems , such as the digestive system , which includes the stomach , esophagus , intestines and other organs .
A single point mutation in the DNA near the lactase gene changes the cytosine (C) nucleotide to a thymine (T). Individuals with the thymine (T) nucleotide are lactose tolerant and can digest the milk products in adulthood.
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