One of 20 molecules built of an amino group, a carboxyl group, and a uniqueside chain; proteins are constructed of combinations of these. these wereproduced in the urey-miller experiment, which demonstrated how complexorganic molecules could have formed in earth's early environment. amino acid microsphere phospholipid archaea

Amino acids.

Explanation:

Miller -Urey experiment was performed by creating the primitive earth condition in the laboratory. The main aim of this test was to determine the chemical origin of the life.

The electrodes was used to create the spark conditions and different gases like  water, methane, ammonia, and hydrogen. The product was obtained after some days of the reaction. The amino acids like glutamic acid, glycine, α-alanine and β-alanine was obtained from the product of this experiment.

Thus, the correct answer is option (1).

answer: - few nutrients

high pressure

low temperatures

explanation: 1. few nutrients:   open-ocean zone is located way far from the land, which is the main source of the essential nutrients.2. high pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.3. ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface. 4. varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.5. low temperatures:   the temperature of open-ocean zone ranges from a low of -2°c to an average of 17°c

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.