Answer:
your answer is antibodies reacting to foreign antigens.
At birth the cranial bones are not fused so that the head can easily traverse the birth canal. The bones of the hands and feet are not fused so that the wrist and ankles can be more flexable when subject to stress. The bones fuse as a person matures. The carpals and tarsals by the age of 17 usually. The skull by age 2.
Antibiotics are only effective against bacterial pathogens.
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The term "niche" would be best applied to a description wherein species are likely to be considered "fit" to live in an environment that has specific conditions. In addition, the ecological niche mainly involves the organism's interaction with different factors present in the environment.
Answer:
Explanation:
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