First item's answer is letter B. A barter economy is an economy system that does not use money for trade but rather uses goods or services exchanged.
Second item's answer is C. Frederick Barbarossa was drown during the Third Cruisade in Goksu River.
I encountered this question before but it had choices. The missing choices of this question are:
A- immigration
<span>B-Natural selection </span>
<span>C- Random mutations </span>
<span>D- Geographic isolation
My answer would be C - RANDOM MUTATIONS.
A. Immigration is not applicable because it states There has been no migration in or out of the population in the last 200 years.
B. Natural selection is not applicable because of it states that the recessive allele frequency has been 0%.
D. Geographic isolation is not applicable because it is not a factor in the increase in the recessive allele frequency.
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Is a political philosophy or world view founded on ideas and equality.
10entre 10 es 20 y 20 entre 20 es 40
