1) Homeostasis describes the carefully maintained optimal physiological conditions in our body, regardless of our outside conditions. Viruses can disturb this homeostasis by growing in our body, where they do not below, and producing toxins. Viruses are very much like the effect of a storm at sea on a sailing ship, as the ship is unable to rect as normal to feedback controls to maintain a course.
2) The feedback loop in a sailing ship to maintain it's course would be the ships captain checking the course and detecting that the ship is off course, giving a signal for the ship's rudder and sails to be adjusted. The wind that first pushed the ship off course then plays a role in bringing the ship back on course.
Answer:
Definition. (1) The combination of oxygen with a substance forming oxide. (2) A chemical reaction in which there is the loss of electrons or gain (or increase in the proportion) of oxygen, hence, resulting in an increase in oxidation state by a molecule, atom or ion.
I believe the answer is A. A single origin of modern people and eventual replacement of archaic homo sapiens throughout Africa, Asia and Europe. Out of Africa model; asserts that modern humans evolved relatively recently in Africa, migrated into Eurasia and replaced all populations which had descended from Homo erectus. After Homo erectus migrated out of Africa the different populations became reproductively isolated, evolving independently, and in some cases like the Neanderthals, into separate species. Homo sapiens arose in one place, probably Africa. Homo sapiens ultimately migrated out of Africa and replaced all other human populations, without interbreeding modern human variation is a relatively recent phenomenon.
A) because if you look at the chart, the numbers on the right increase then decrease when it hits 19:00.
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