A population of dogs has 33 members. 23 are homozygous dominant for black fur, six are heterozygous and four are homozygous recessive for brown fur. What is the frequency of the dominant and recessive alleles?
Total alleles:
Total dominant alleles:
Total recessive alleles:
Frequency of dominant alleles:
Frequency of recessive alleles:

Why are small quantities of chlorofluorocarbons so harmful to the ozone layer? a. the chlorofluorocarbons act like ultraviolet radiation causing large amount of ozone to be produced. b. the chlorine from the chlorofluorocarbons reacts with free molecules of oxygen causing a stop in ozone production c. free oxygen atoms can replace the chlorine in chlorine monoxide, releasing a free atom of chlorine which can then recombine with an oxygen atom in ozone, destroying more ozone. d. chlorofluorocarbons absorb ultraviolet radiation, preventing the formation of ozone select the best answer from the choices provided

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million

Jason puts an apple on top of an ice pack in his lunch bag lunch time the temperature of the apple has decreased what happens to the molecules in the apple when the temperature of the apple decreases