Relative dating of fossils worksheets

If the researcher removes all slugs from the study population, what would you expect to happen to the distribution of flower colors in the population over time? (3 Pts) The ability to taste phenylthiocarbamide (PTC) is a trait controlled by 2 alleles (PTC taster and PTC non-taster).Suppose 36% of a remote mountain village cannot taste PTC and must, therefore, be homozygous recessive (aa) for the PTC non-taster allele.

If this population conforms to Hardy-Weinberg expectations for this gene, what percentage of the population must be homozygous (AA) for the PTC taster allele? (3 Pts) The Dunkers are a religious group that moved from Germany to Pennsylvania in the mid-1700s. It is a filtering process that eliminates disadvantageous changes in genes from the gene pool (and increases the frequency of advantageous geneotypes). In allopatric speciation, populations are separated by geographical barriers and reproductive isolation is easy to maintain due to the physical separation of the populations.

They do not marry with members outside their own immediate community. It can produce advantageous, neutral, and disadvantageous changes. The geographic barriers prevent gene flow and the forces of evolution act independently on each population, leading to speciation.

In the infancy of our home planet the entire earth was molten rock - a magma ocean.

Since we can only measure as far back in time as we had solid rock on this planet, we are limited in how we can measure the real age of the earth.

Clouds formed and storms raged, raining more and more water down on the primitive earth, cooling the surface further until it was flooded with water, forming the seas.

It is theorized that the true age of the earth is about methods to determine the age of rocks means scientists have to rely on when the rock was initially formed (as in - when its internal minerals first cooled).As the collisions tapered off the earth began to cool, forming a thin crust on its surface.As the cooling continued, water vapor began to escape and condense in the earth's early atmosphere.The bees that pollinate this plant prefer also prefer pink to white flowers, so that Claytonia with pink flowers have greater relative fruit set (reproductive success) than Claytonia with white flowers.A researcher observes that the percentage of different flower colors remains stable in the study population from year to year.Today, the Dunkers are genetically unique and differ in gene frequencies, at many loci, from all other populations including their original homeland. In parapatric speciation, there is no physical barrier separating two populations which occur side-by-side (thus para).

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