hello

If the two finch populations are each in Hardy-Weinberg Equilibrium, and are isolated from each other, then which of the following graphs correctly displays the relative genotypic frequency 589/2180=.27

589/2180=.27 = .52 - 1= .48 2(.52)(.48)=.5 same with island 2

Which of the following best describes the mechanism behind the change in beak size in the finch population?

A change in gene frequencies in the finch population due to selective pressure from the environmental change

Based on morphological characteristics, the phylogenetic tree above has been developed for species I, II, III, and IV. DNA sequencing has recently been completed for a particular gene found in all four species. The sequencing will provide additional information for answering which of the following questions?

Are species III and IV the most closely related?

Lobe-finned fishes were present in the oceans of the world approximately 400 million years ago. The first tetrapods (vertebrates that had limbs and could move on land) date to about 365 million years ago. One hypothesis states that early tetrapods evolved from lobe-finned fishes. Which of the following is the best plan for testing the hypothesis?

Comparing the arrangements of bones in the fins of lobe-finned fishes and limbs of the earliest tetrapods.

Which of the following statements might best explain the increase in average beak size in the finch population during the drought?

Finches with bigger beaks are better able to crack thick-walled seeds and produce more surviving offspring.

The table shows the changes in allele frequencies of a specific gene in two populations of randomly mating small mammals after 30 years. The populations inhabit adjacent equatorial islands that have similar topography and climate. Which of the following is the most reliable conclusion that can be drawn from analysis of the data above?

Genetic drift has occurred in population 1.

While there is only one species of Galápagos Island tortoise, there are several subspecies. Larger islands with more wet highlands have lush vegetation near the ground. Tortoises there tend to have high-domed shells and shorter necks, which restrict upward head movement. They also have shorter limbs. They are the heaviest and largest of the subspecies. Smaller, drier islands are inhabited by tortoises with longer necks and limbs and with shells that are elevated above the neck, which allow them

Individuals with different adaptations in shell shape and leg length best exploited the food resources and left more surviving offspring on each island.

In a species of cactus, the number of spines on a plant is genetically determined. The graph above shows frequency distributions for populations of the cactus species growing in the presence or absence of two herbivores: peccaries (a New World pig) and wasp larvae. Which of the following best accounts for the different frequency distributions in the graph?

Peccaries eat cacti with a smaller number of spines, and wasp larvae eat cacti with a greater number of spines.

Which of the following best explains the changes in the phenotype frequencies of the stickleback population in Loberg Lake?

Predation in the marine environment is different from predation in Loberg Lake.

Matings between individuals from the two populations of Rhagoletis produce hybrid flies that appear to be healthy and have normal life spans. The eggs laid by these hybrid flies, however, hatch less often than those of flies from either of the two populations. What isolating mechanism seems to be important in this hybrid population?

Reduced hybrid fertility

Initially, which of the following isolating mechanisms is likely to have been the most important in preventing gene flow between the two populations of Rhagoletis?

Temporal isolation

Ellis-van Creveld syndrome is a recessive genetic disorder that includes the characteristics of short stature and extra fingers or toes. In the general population, this syndrome occurs in approximately 1 in 150,000 live births. In a particular isolated population, however, the incidence of this syndrome among live births is 1 in 500. Assume that both the isolated population and the general population are in Hardy-Weinberg equilibrium with respect to this syndrome. Which of the following best des

The frequency of the Ellis-van Creveld allele is 0.0447 isolated population and 0.0026 in the general population, which suggests that genetic drift has occurred in the isolated population.

Two populations of a species of squirrel are geographically isolated from each other. Although they have the same population density, one population is significantly larger in number than the other. A new bacterial disease, which is easily spread and extremely virulent, affects both populations at the same time. Which of the following is the best prediction of how the new disease will affect the two populations?

The smaller population will be more affected than will the larger population, because the smaller population has less genetic variation than the larger population has.

Two species of garter snakes (T. atratus and T. sirtalis) prey on the California newt, Taricha torosa, a small amphibian that produces a potent neurotoxin (TTX) in its skin. However, neither species of garter snake is affected by TTX. The resistance toTTX is associated with mutations in the SCN4A gene. Which of the following best supports a claim that TTX resistance arose independently in T. atratus and T. sirtalis?

The two species of snakes have different genetic mutations in the SCN4A gene.

The FtsZ protein is present in prokaryotes (simple one celled organisms that were believed to be the first forms of life) and in chloroplasts (cell organelles responsible for photosynthesis found in more advanced cells called eukaryotes). The protein is structurally and functionally similar to tubulin proteins of eukaryotic cells (more advanced cells). Which of the following is a likely conclusion to draw from this information?

Tubulin genes are evolutionarily derived from the gene that codes for the FtsZ Protein.

independent variable

Year in which the sample was collected the data that has no affect other than collecting data

Some people have the ability to taste a bitter chemical called phenylthiocarbamide (PTC). The ability to taste PTC is due to the presence of at least one dominant allele for the PTC taste gene. The incidence of nontasters in North America is approximately 45%. Assuming the population is in Hardy-Weinberg equilibrium, what percent of the North American population is homozygous dominant for the ability to taste PTC?

p- .55q- .45p^2- .3025q^2- .20252pq- .49530.25% is homozygous dominant

The divergence between the two populations of Rhagoletis must have occurred very rapidly because

the apple tree was imported into North America with European settlement approximately 200 years ago.