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atroni [7]
3 years ago
7

The principal characteristic that determines whether an aquatic ecosystem is classified as marine or freshwater is _______.

Biology
2 answers:
BlackZzzverrR [31]3 years ago
8 0
<span>The principal characteristic that determines whether an aquatic ecosystem is classified as marine or freshwater is '</span>salinity'.
maxonik [38]3 years ago
4 0
The correct answer is Salinity.

Salinity refers to the principal characteristic that determines whether an aquatic ecosystem is classified as marine or freshwater. It is the measure of all the salts dissolved in water. It is usually measured in parts per thousand. 
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Explain what TWO forces cause Earth’s water to bulge?
wel

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3 years ago
In a population of plants, the allele for long stems is completely dominant over the allele for short stems. If 35% of the popul
KatRina [158]
Assumptions:
1. Equilibrium has been reached for the allele proportions
2. Absence of <span>evolutionary influences such as </span>mate choice<span>, </span>mutation<span>, </span>selection<span>, </span>genetic drift<span>, </span>gene flow<span> and </span>meiotic drive<span>.
</span>
Defining L=long stem, l=short stem, and L is dominant over l.
f(x) = frequency of allele x  (expressed as a fraction of population)
Then the Hardy-Weinberg equilibrium law applies:
p^2+2pq+q^2=1
where 
f(LL)=p^2
f(Ll)=2pq
f(ll)=q^2

Given f(ll)=0.35=q^2, we have
q=sqrt(0.35)=0.591608
p=1-q=0.408392
=>
f(Ll)
=2pq
=2*0.408392*0.591608=0.483216
= proportion of heterozygous population

Answer: percentage of heterozygous population is 48.32%
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Explanation:

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4 years ago
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