___ is how often an allele occurs in a gene pool with regard to other alleles for the same gene.

Variation in the gene pool comes from ______.

A group of individuals who are all of the same species that breed to produce fertile (viable) are a ______.

In the gene pool for hamsters, there are 4 alleles that determine fur coat color. If B = 40% ; W = 10% ; G = 20%, what is the frequency of allele "T"?

_______ is a process where the environment determines the value of a favorable trait within a species/population.

_______ is a process where man/human beings determine the value of a favorable trait within a species/population.

According to the theory of natural selection, individuals who survive and reproduce are the ones _____________ adapted for their environment.

If an organism is best- suited for its environment, their survival is due to the inheritance of traits that ____________ fitness.

Organisms that live long enough to successfully reproduce are the ones that are ______________________ to their environment.

____________ is the ability of an individual to survive and reproduce in its environment.

Organisms well-suited to their environment are ________________ to reproduce than those _____________ to the same environment.

The white squirrel has decreased fitness because it is not camouflaged as well as the normal color squirrel. Camouflage is a _____________ types of adaptation.

The non-harmful hawkmoth larva puffs up to look like the harmful parrot snake. This is an example of ______.

The blue bacteria can be killed by the antibiotics. The orange ones are resistant. Over time, the blue ones die off in the presence of the antibiotic but the drug-resistant bacteria are the only ones to survive and reproduce. This is an example of the drug-resistant bacteria having a(n) _____________ adaptation.

Male birds (like the peacock) will flash their pretty-colored feathers, sing beautiful songs, and do fancy dances to impress and attract the females during mating season. This flashy actions of the males are examples of ____________ adaptations.

What type of natural selection is shown?

What type of natural selection is shown?

What type of natural selection is shown?

A larger chicken can scratch faster and find/eat more bugs and food than a smaller chicken. The larger chicken out-competes the smaller chickens when food supplies are limited. What type of selection is most likely occurring?

If a plant is too short, it may not be able to compete with other (taller) plants for sunlight. However, extremely tall plants may be more susceptible to wind damage. Medium-height plants seem to not have either problem. What type of selection is most likely occurring?

In a population of squirrels, short tails prevent predators from catching the short-tailed squirrels while they are on the ground. The longer tails help the squirrels balance better when up in the trees. Medium-length tails do not give a benefit, so there are very few medium tail squirrels. What type of natural selection is shown?

In Missouri, the river otter was basically extirpated (locally extinct). A small group of breeding pairs were taken from an area in Tennessee and brought to Missouri. This small group of river otters began to successfully reproduce in MO for many decades. This is an example of ______.

Around 1814, a small group of British colonists founded a settlement on Tristan da Cunha, a group of small islands in the Atlantic Ocean, midway between Africa and South America. One of the early colonists apparently carried a rare, recessive allele for retinitis pigmentosa, a progressive form of blindness that afflicts homozygous individuals. As late as 1961, the majority of the genes in the gene pool on Tristan were still derived from 15 original ancestors; as a consequence of the inbreeding. This type of blindness is significantly higher in the small island group when compared to the general public in other geographic areas. What pattern of genetic change is being described?

Due to several decades of humans taking away habitats and fatalities with hitting the Florida panther on the highways, the population size of the Florida panther dwindled down to about 6 mating partners. Efforts were made to save and protect the Florida panther, whose population size is now growing again. What type of pattern of genetic change is being described?

What type of pattern of genetic change is being described?

A sudden disaster or catastrophe kills many individuals in a population, which leaves behind only a small number of survivors to "restart" the population growth cycle again. This small group of survivors do not have all the variety in the gene pool as the original population once had.

The situation in which allele frequencies do not change is called _____.

Which scientist did this:

studied economics & human populations; stated that factors that control population size are war, famine, and disease. Without those factors, resources would run out.

Which scientist did this:

studied botany; stated that organisms gain & lose traits by the way they use them; these acquired traits can be passed on to offspring.

Which scientist did this:

studied geology; claimed the Earth must be very old & constantly changing.

Which scientist did this:

studied biology & claimed all species are involved in a competition for survival; those organisms who are best suited to their environment will survive and reproduce more successfully

The most accurate, reliable to determine evolutionary relationships between 2 organisms is to examine:

These wings have the same function but are built differently & have a different structure. These are examples of ____ structures.

How would you describe the structures in this picture?

_____ is the study of embryos to show a common ancestor because of similarities in development

Embryos of chickens, fish and humans look very similar. They all have folds known as gill pouches in the neck region. What may this suggest?

These vertebrate limbs are examples of _____ structures since they are built the same but do different jobs.

Which of the following statements are sources for evidence that populations are evolving and changing over time?

#1: Use DNA base sequences/amino acids/proteins to show the % of similarities

#2: fossils can show how organisms change over time but also can be used to compare to present day organisms.

#3: compare anatomy (homologous & vestigial structures)

#4: compare how embryos develop

The appendix in humans is an example of a(n) _____ structure.