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Andrej [43]
3 years ago
7

In coastal areas, wind moves sand, blowing away or engulfing the soil, and eventually creating sand dunes

Biology
2 answers:
fomenos3 years ago
4 0
In physical geography<span>, a </span>dune<span> is a </span>hill<span> of loose </span>sand<span> built by </span>wind<span> or the flow of water.</span><span> Dunes occur in different shapes and sizes, formed by interaction with the flow of air or water. Most kinds of dunes are longer on the windward side where the sand is pushed up the dune and have a shorter "slip face" in the lee of the wind. The valley or trough between dunes is called a </span>slack<span>. A "dune field" is an area covered by extensive sand dunes. Dunes occur, for example, in some </span>deserts<span> and along some coasts.</span>
Art [367]3 years ago
4 0

Answer:

Sand dunes are formed by the wind, it is formed usually along the beach or desert. It is formed when the air continues to blow sand into an area behind an object. It continues to grow as grains of sand get condensed. The sand can be transported to a different location by saltation, surface creeps and by suspension where it can settle along with beach and desert in order to form dunes.






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100 individuals whose genetic makeup is composed of 20% recessive alleles join an established population. The established popula
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Answer:

population = 600

heterozygotes = 2pq

The homozygous recessive percentage = q^{2}

q = 0.1

Solve for q:

∴ q = \sqrt{q}

∴ q = \sqrt{0.10}

∴ q = 0.316

solve for p:

for p + q = 1,

thus p = 1 – q = 1 – 0.316 = 0.684  

The heterozygotes = 2pq

2pq =  2 x 0.316 x 0.684 = 0.432

600 x 0.432 = 259.2  = 259

so,  the population reaches Hardy Weinberg equilibrium, 259 of indviduals should be heterozygous for this trait.

Hence, the correct answer is 259 .

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