# Consider the following scenarioIn a muddy lake environment, some fish have brown scales. Most fish, however have silver scales. Predators have a harder

Consider the following scenario In a muddy lake environment, some fish have brown scales. Most fish, however have silver scales. Predators have a harder time seeing the fish with brown scales
Which term best describes the brown scales?

new mutation
inactivated gene
predominant phenotype

## This Post Has 4 Comments

1. Expert says:

D=m/v =57.9/3 = 19.3 g/cm^3

2. Expert says:

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,

u

f

6

will have a gram-molecular weight of 352g.

3. Expert says:

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.

4. Expert says:

Exothermic,  physical change after it is already baked