Deltas have long played an important role in human history. These fertile areas where rivers flow into large bodies of water have served as fishing, farming, and living sites. Of the great deltas around the world, perhaps none has had a greater role in civilization than the delta of Egypt's Nile River. Greek historian Herodotus (c. 484–c. 425 <span>B.C.E. </span>), considered by many as the "Father of History," studied this great geologic feature. He is credited with coining the term "delta" for this type of landform because its triangular shape reminded him of the Greek letter ∆ (delta).
The shape of the land
A delta is a body of sediment deposited at the mouth of a river or stream where it enters an ocean or lake. Unlike other landforms affected by running water, a delta is not created primarily by water cutting into or eroding the landscape (erosion is the gradual wearing away of Earth surfaces through the action of wind and water). Water does not tear down a delta; instead, it builds up a delta.
A river creates a delta by laying down sediment or rock debris such as gravel, sand, silt, and clay that it has picked up and carried along its course. Alluvium (pronounced ah-LOO-vee-em) is the general term for sediment deposited by running water. A river's depth, its width, and its speed determine how much sediment it can carry. The Mississippi River flows at an average surface speed of about 2 miles (3 kilometers) per hour. Yet it drains between 1.2 and 1.8 million square miles (3.1 and 4.6 million square kilometers), which is more than 40 percent of the total area of the continental United States. Over the course of a year, it moves an average of 159 million tons (144 million metric tons) of sediment.
In general, deltas are similar in shape to another type of landform deposited by flowing water, alluvial (pronounced ah-LOO-vee-al) fans.
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Cells belonging to Prokaryotic domain(s) generally which have the cell wall but lack organelles
The Prokaryotes are the organisms whose cells lack of the nucleus and the other organelles. Prokaryotes are mainly divided into two distinct groups: such as the bacteria and the archaea, which the scientists believe that have the unique evolutionary lineages. Most of the prokaryotes are small, a single-celled organisms that have the relatively simple structure.
The Prokaryotes are the single celled, the microscopic entities. They have neither have specialized organelles nor the prominent nucleus with the membrane. Examples of the prokaryotes that include the cyanobacteria, E. coli, the mycoplasma etc.
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Sugars, starches, fats, proteins.
Vegetables and meats are not types of food molecules but rather, specific food molecules.
Answer:
<u>Endocrine system, minutes to days</u>
<u>nervous system, less than one second</u>
Explanation:
Nervous system takes information through senses, processes the information and triggers reactions.
Nervous system has less reaction time because it uses <u>electrical signalling </u>(neural impulses) while Endocrine system uses<u> chemical signalling </u>(hormones).
The endocrine system responds to stimulus by secreting hormones in the blood (circulatory system) that travels to the target organ, and hence take more reaction time.
Answer:
Protein denaturation can be defined as the condition in which protein or nucleic acid lose their Quaternary structure, tertiary structure or secondary structure which is present in its native form.
This is done by help of some external stress or compounds say base, acid, concentrated inorganic salts.
Protein hydrolysis can be defined as the condition in which the proteins are cleaved at specific sites so that it can be converted into amino acids.
There are many food processing techniques that results in protein hydrolysis or protein denaturation. Example: Pasteurization, mechanical mixing, boiling, et cetera