A portal of entry<span> is the site through which micro-organisms enter the susceptible host and cause disease/infection. Infectious agents enter the body through various </span>portals<span>, including the mucous membranes, the skin, the respiratory and the gastrointestinal tracts.</span>
Answer:
An increase in the combustion of fossil fuels
Explanation:
A cell that consists of 3 types the cell membrane,the nucleus,and between the two,the cytoplasm within the cytoplasm lie intricate arrangements of fine fibers.
your answer should be “interspecific competition”
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