Human migration is the movement over long distances, movement from one country/region to another ) by people . Humans moved because of the c<span>hanging climate and landscape and inadequate food supply. </span>The first human movement was t<span>he movement of </span>Homo erectus<span> out of Africa across </span>Eurasia<span> about 1.75 million years ago. </span>
Than industrialization<span> encouraged migration wherever it appeared.
Wars also created migration. (</span><span>The First and Second World Wars, and wars, genocides, and crises sparked by them, lead to migrations).</span>
The molecules of nitrogen in the urine are broken down into ammonium. - Step 5 ("Nitrogen is found in the urine, which gets broken down into ammonium through the process of ammonification<span>.")
Then, ammonium is converted into nitrates by nitrifying bacteria. - Step 1 ("</span><span>Ammonium can be absorbed by plants, but some is converted into nitrates which are better for plants to absorb. This is called nitrification.")
There are then two ways that the cycle can take... in the one related to the deer, follows the assimilation where the plants add the nitrogen to protein. - Step 6 ("</span><span>Plants absorb the ammonium and begin assimilation, the process to add the nitrogen to protein.")
The deer then eats the plants and the nitrogen is again inside it and ready to be used and again released in urine. - Step 2 ("</span><span>The deer eats the plants and uses the nitrogen-containing proteins for cell growth.")
The other way that the nitrogen may take is denitrification by denitrifying bacteria. - Step 4 ("</span><span>Some of the nitrates are absorbed back into plants, but denitrification breaks down the nitrates into nitrogen gas released back into the atmosphere.")
This gas is then captured by nitrogen fixing bacteria, called nitrogen fixation. - Step 3 ("</span><span>Bacteria in the soil conduct nitrogen fixation to convert nitrogen gas from the atmosphere into ammonium.")
The ammonium is now ready again for t</span>he process of ammonification.
In Indian cuisine, sometimes a papaya is added to make meat cook faster. Why does this method work?
A- Papaya helps increase the temperature of the meat, hastening the cooking process.
B-Papaya has the enzyme papain, which tenders the meat tissues, hastening the cooking process
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C-Papaya has the enzyme papain, which increases the pH of the meat recipe, hastening the cooking process.</u>
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