Evolution Test ...

A flowering plant is

A large population of zebrafish has been allowed to breed randomly for a number of generations in a laboratory.
After ten generations, 25% of the fish display a recessive genotype (dd), the same percentage as at the beginning of the breeding program. The rest of the fish show the dominant phenotype, with heterozygotes indistinguishable from the homozygous dominants.
What is the most reasonable explanation of the fact that the frequency of the recessive genotype (dd) at generation ten is the same as the frequency of the recessive genotype (dd) at generation one?

Donald Johanson, Tom Gray, and others discovered a hominid that lived in east Africa and nicknamed her Lucy. What is the scientific name of Lucy and there existence in earth?

Which of the following organism shows most close relationship to Smilax herbacea?

A skin and respiratory fungus killed most of the tree frogs in a hypothetical forest in the state of Washington. The population dropped from 1,200 to 320. Scientists caught 25 frogs and, in an effort to help preserve the species, started a new population in a similar forest in the eastern portion of the state of Oregon. Which of the following factors would probably have the least impact on this new population?

One way to classify humans is by their blood type. There are over two dozen ways to group blood types. One of them is by the presence of the D antigen on the surface of blood cells. If an individual expresses the D antigen, they are referred to as Rh positive. This is controlled by an autosomal dominant allele. In a given town, 16% of the population is considered Rh negative.
If this town's high school has 2,000 students, how many would you expect to have the homozygous recessive genotype?

It makes sense that a human with excessive body odour may have trouble convincing other people to date them. Beyond that, most people probably don't think that smell is a major factor in deciding who to date or have children with.
However, evidence suggests that there is a connection between personal odor and immune genes. Studies indicate that humans prefer the odor of individuals whose immune system genes are different than their own.
What could be the evolutionary benefit of people with different immune system alleles mating?

One way to classify humans is by their blood type. There are over two dozen ways to group blood types. One of them is by the presence of the D antigen on the surface of blood cells. If an individual expresses the D antigen, they are referred to as Rh positive. This is controlled by an autosomal dominant allele. In a given town, 16% of the population is considered Rh negative.
If this town's high school has 2,000 students, how many would you expect to be heterozygous for the D antigen?

The medium ground finch is a species of bird endemic to the Galapagos Islands that eats by cracking seeds open with their beaks to obtain the food inside. Finch beak size (depth) is controlled by the BMP4 gene, which produces a growth factor known as bone morphogenic protein. In 1977 the Galapagos Islands experienced an intense drought, which severely reduced the population of small seeds and the plants that produced them.
Figure 1 above illustrates the changes in the distributions of finch beak depths (size) before and after the drought of 1977. The mean depth is indicated above the caret symbol (^).
Which of the following statements best explains the trend in finch beak size during 1976 - 1978?

In 2012, Ryan Clark of the Pittsburgh Steelers was forced by his coach to sit out of a playoff game in Denver due to health concerns. Clark is a heterozygote for sickle cell anemia.
Sickle cell anemia is a recessive condition that results in misshapen red blood cells due to a mutation in the hemoglobin gene. The condition greatly reduces the ability of red blood cells to carry oxygen.
Heterozygotes generally do not have symptoms of the condition, but will sometimes have problems when dehydrated or at high altitudes. In addition to reduced oxygen carrying ability, the sickle cell allele has another trait; resistance to malaria.
Some areas of the world have a sickle cell allele frequency of up to nearly 20%. What would you expect to find in areas of the world with high sickle cell frequencies?