What pathogen causes flu and the common cold

While the common cold may be caused by over 200 distinct and continually evolving viral pathogens; rhinoviruses, coronaviruses and respiratory syncytial viruses appear to be some of the most common (Turner 2009; Nussenbaum 2010; Worrall 2011; CDC 2012C)

While the common cold may be caused by over 200 distinct and continually evolving viral pathogens; rhinoviruses, coronaviruses and respiratory syncytial viruses appear to be some of the most common (Turner 2009; Nussenbaum 2010; Worrall 2011; CDC 2012C).

c is the answer : )               your welcome

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.