Intracellular pathogens sometimes produce that can kill phagocytes. Intracellular pathogens sometimes produce that can kill phagocytes. PRRs leukocidins PAMPs lipopolysaccharides

Leukocidins.

Explanation:

Intracellular pathogens sometimes produce leukocidins that can kill phagoctytes because leukocidins is a type of cytotoxin that is produced by pathogens which kill the phagocytes producing pathogens. The phagocytes destroy pathogens by engulfing the pathogens and destroying it by chemical toxins present inside the phagolysosome which is by a process called phagocytosis. The leukocidin kill phagocytes that engulf the pathogens making the pathogens to be able to affect the organism in which it invade.

estuaries are the partially enclosed coastal bodies of brackish water formed at the mouth of sea where river meets an ocean. it is a transition zone between river and sea water so estuaries are influenced to both marine environment such as tides, waves and to riverine such as flow of fresh water and sediments. the mixing of sea and fresh water provide high level of nutrients, making estuaries a high product habitats.

many estuaries suffers degradation from a variety of human activities like erosion from deforestation, overgrazing, overfishing, drainage and eutrophication.

so from the above statement answers will be

1. false as estuaries are formed due to both brackish and freshwater.

2.true, due to high productivity estuaries are breeding ground for many marine species.

3. direct and indirect activities of man that contribute to pollution and deposition of sediments.