Answer:
A variety of genes are involved in the control of cell growth and division. Tight regulation of this process ensures that a dividing cell's DNA is copied properly, any errors in the DNA are repaired, and each daughter cell receives a full set of chromosomes.
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Nuclear fusion takes place at the core of the sun
Answer:
The Linnaean system of classification consists of a hierarchy of groupings, called taxa(singular, taxon). Taxa range from the kingdom to the species (see Figure below). The kingdom is the largest and most inclusive grouping
Explanation:
Symbiotic bacteria have already established their colonies in the host hence prevent the invasion of other bacteria through competition. They act as a barrier to keep nastier pathogens at bay. These bacteria are also important in mucosal immunology of humans by influencing on the development and function of both innate and adaptive branches of the immune system.