Which of the following statements is true about all cells?
A. They are all part of tissues.
B. They all contain chlorophyll.
C. They all have a cell wall.
D. They all have a cell membrane.

The true statement about all cells is ; ( D ) They all have a cell membrane

Cells are composed of sub particles and this depends on the type of cell ( eukaryotic cell and prokaryotic cell ) but every cell have one sub-particle in common which a plasma cell membrane which regulates the inflow of substances into a cell.  

Some organisms are single celled therefore their cell cannot be said to be part of a tissue, while multi-celled organisms are composed of tissues. only plant cells contain chlorophyll and also possess plant cells.

Hence we can conclude that the true statement about all cells is that they all have a cell membrane.

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D. They all have a cell membrane.

Explanation:

It can't be A because blood cells aren't part of tissues.

It can't be B or C because chlorophyll and cell walls are only in plant cells.

answer: tributaries flow into rivers.

wetland is a biome that develops when the water gets accumulated in a land exhibiting a huge depression. these form either seasonally or permanently. the water in the wetland comes from rivers, lakes, ocean, flood, rain or other sources. the wetlands includes mangroves, marshes and peatland.

tributaries flow into the rivers develops a wetland because such water will get deposited in the depression and will restrict the original flow of tributary water. hence, water with low drainage current combines with the river water.