Answer:
Either B. or D.
Explanation:
I don't know for sure, these two answers just seem better than the others.
Santa= AA
Mrs Claus= aa
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PARIENTAL: AA x aa
Gamets: A A x a a
F1: Aa ,Aa,Aa,Aa -100% good vision
Pariental 2: Aa x Aa
Gamets: A a x A a
F2: AA Aa Aa aa so we have here 75% good vision,25% bad vision which is 3:1
and we have 1 dominant homozygous,2 dominant heterozygous and 1 recessive homozygous,which is 1:2:1.
Answer: Volcanic materials ultimately break down and weather to form some of the most fertile soils on Earth, cultivation of which has produced abundant food and fostered civilizations.
The internal heat associated with young volcanic systems has been harnessed to produce geothermal energy.
2 disadvantages could be the destruction of life and the ash that fills the air far and wide when it erupts
Portland, Oregon, is a city right next to northern west coast of the USA. Besides being very close to the sea, it is also laid on a river. The sun that heats up the ocean and the river leads to evaporation, causing water vapour to ascend, because of a few wind currents, this water vapour is taken to Portland's area where it colds down and condensates, raining over Portland.