The answer is A
Answers B, C, and D are mentioned on the website, but answer A isn't mentioned
Our ancestors only eat what they needed. They did not splurge, or take their girl friends out on dinner dates for fries and greasy meals. They hunted and they dined in the driest and roughest of places. The CroMagnons, as beautful and naked as they were, because a symbol of humanity towards the future.
Hello
The pH range of tolerance for humans is well defined and very small for a number of reasons.
First, we must understand that all biological reactions in our body are carried out by biological catalysts called enzymes. These enzymes operate under specific pH and and temperature conditions. Deviation from these conditions will result in inefficiency of the enzymes' functions. This may be observed macroscopic-ally as poor digestion among other things.
Next, an equilibrium is necessary for the movement of CO2 in red blood cells. CO2 is kept in equilibrium in the form of carbonic acid. This equilibrium may be disturbed by the change in pH; resulting in a difficulty to breathe.
Other effects such as fatigue, headaches and nausea may also be observed as the blood circulates throughout your body and its functions will be impaired by the changed pH.
Answer:
Most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them. We understand that magnets have two poles and that depending on the orientation of two magnets there can be attraction (opposite poles) or repulsion (similar poles). We recognize that there is some region extending around a magnet where this happens. The magnetic field describes this region.
There are two different ways that a magnetic field is typically illustrated:
The magnetic field is described mathematically as a vector field. This vector field can be plotted directly as a set of many vectors drawn on a grid. Each vector points in the direction that a compass would point and has length dependent on the strength of the magnetic force. Arranging many small compasses in a grid pattern and placing the grid in a magnetic field illustrates this technique. The only difference here is that a compass doesn't indicate the strength of a field.
I hope it helps.
The sequence of amino acid in polypeptide is dictated by the codons in the messenger RNA molecules from which polypeptide was translated. The sequence of codons in the mRNA was in turn dictated by the sequence of codons in the DNA from which the mRNA was transcribed. The amino acids are linked covalently by peptide bonds.
