Bio semester 2 #1

Darwin saw a correspondence between the finches beaks and their

food sources and determined that which of the following shaped them?

• Natural Selection

• Evolution

• Rapid Reproduction

• Genetic Cross

The theory of evolution by natural selection requires that which three conditions are met?

• Phenotypic variation must exist in the population

• This variation must lead to differences among individuals

  in a lifetime reproductive success

• Genotypic variation must not alter the physical appearance of the population

• Phenotypic variation among individuals must be

  genetically transmissible to the next generation

The moths that present the jet black coloring are all descendants of which of the following?

• A single genetic mutation

• A genetic cross

• A striped moth

• A spotted moth

a dominant allele, it was

very rare before what year?

• 1950
• 1850

• 1800
• 2000

After 1850, the number of dark moths increased in frequency near

industrialized centers, making up almost _% of the population

around those areas?

• 25%

• 50%

• 100%

• 10%

Scientist noticed that around the industrialized centers, the

tree trunks had been darkened by soot and pollution, also

killing all of the light-colored lichens present on tree trunks. How did this affect or change the moths?

• The moths became smaller in size to avoid being seen on the darkened tree trunks
• The moths started eating the lichens to adapt to the change
• The lighter colored moths could be seen more easily by predators on the dark, sooty trees, while the black moths were able to blend in better and evade being eaten.

• The moths developed the ability to fly faster to escape the pollution

What is Industrial melanism?

• A type of farming technique using industrial waste as fertilizer
• The process of using industrial machinery to produce melanin for cosmetic products
• A term for the darkening of skin due to exposure to industrial chemicals
• A phrase that it is used to describe the

  evolutionary process in which initially light-colored organisms become dark as a result of natural selection

When the peppered moth population was sampled again, the dark

colored moth had dropped from _% of the population to less than

_% in 2002.

• 93%, 5%

• 5%, 93%

• 20%, 50%

• 5%, 100%

Regardless of the agent of selection, the increase and then decrease in

dark colored moths correlated with and increase and decrease in

pollution on two different continents. What does this demonstrate?

• It demonstrates the correlation between the increase in dark colored moths and a decrease in pollution on two different continents.
• It demonstrates that some kind of selection has driven this evolutionary change

• It demonstrates the similarity between the increase in light colored moths and pollution on two different continents.

• It demonstrates the perfect example of the evolution theory

Artificial Selection is the change in the genetic structure of

populations due to selective breeding by humans. How does artificial selection work?

• By favoring of individual organisms with certain

  phenotypic traits therefore allowing them to reproduce and pass

  on their genes to their offspring.

• By allowing organisms to reproduce without sharing genes to their offspring

• By selectively choosing which genes could interbreed with other organisms

• Artificial selection is a direct result of natural selection

Answer explanation

This leads to an evolutionary change!!!