The presence of freckles is due to a dominant allele. Four percent of the individuals in a particular population lack freckles. Use the Hardy-Weinberg formula to calculate the percentage of individuals in this population who are homozygous dominant for freckles.
a) 32%
b) 80%
c) 64%
d) 20%
e) 4%

Option C

Explanation:

Allele for dominant freckle trait is "F"

Allele for recessive no freckle trait is "f"

Given -

Population lacking freckles  %

As per Hardy Weinberg's equilibrium equation

p represents the frequency of dominant allele in a given population and represents the frequency of dominant individuals in a given population

Like wise

q  represents the frequency of recessive allele in a given population and represents the frequency of recessive individuals in a given population

Frequency of dominant allele

Frequency of homozygous recessive individual

Frequency of homozygous dominant individual

Option C is correct

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg 

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.