What is the function of the structure #16?
Resplratary organs (rib cage partially ramoved)
O Creating a barrier to divide the thoracic and abdominal cavities
O Helping expand and contract the thoracic cavity
O Helping inflated and deflate the lungs
O All answer choices listed

one characteristic that is shared by all is a soft body. many

of these invertebrate animals also have an outer shell to protect their

body. oysters, clams, snails, and mussels are all mollusks. so are octopuses, squids, and slugs. mollusks live on land and in freshwater.

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.

the answer is 100% density i've answered this question before and done the quiz myself.

plato users:

d.  

there was a variety of food available on island x, but there were only large seeds and nuts on island y.