Answer:
x1000 the concentration of hydronium ions in a solution with pH 1 is 1000 times greater than one pH 4
Since the Action AA batteries last 4 times as long as Bonus AA ones, even though they cost four times as much for convenience in only having to change them once compared to 4 times for the same length of time, this is a good reason to buy them. This is especially the case if the batteries are being used in a remote place such as by a geologist with a GPS out in the bush then he/she doesn't have to worry about them running down so much.
Answer:
C) The amount of A is always equivalent to T, and C to G
Explanation:
Chargaff's rule was given by the Austrian chemist, Erwin Chargaff in late 1940s. It explains the composition of the four bases i.e. Adenine(A), Guanine(G), Thymine(T) and Cytosine(C) in a DNA molecule. According to it, purine and pyrimidine bases are always found in 1:1 ratio in a DNA molecule. A and G are purine and T and C are pyrimidine bases and a purine always forms a pair with pyrimidine base hence the amount of A will always be equal to T and amount of G will always be equal to C. This rule forms the basis for the Watson and Crick pairs in DNA double helix model.
Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.
Ketone bodies are byproducts of incomplete metabolism of
fatty acids. Normally, there
are no ketones in urine. Ketone bodies are produced when fat sources are used
instead of
glucose to provide cellular energy. The abnormal values are indicative of a
urinary tract infection. As a result of protein, nitrates, and
leukoesterase in the urine, the nurse can expect the laboratory to
analyze microscopic sediment including evaluating the sample for the presence
of
crystals, casts, WBCs, and RBCs.
