Honors Biology - Unit 7 Review

level of reproductive success

fitness

2 or more alleles for a gene with each occuring at a rate of at least 1%

gene polymorphism

a group of species evolving to occupy a variety of habitats within a region

adaptive radiation

movement of alleles from one population to another

gene flow

change in allele frequency die to random chance

gene flow

What is the book Charles Darwin published to describe his evolutionary theory?

On the Origin of Species

All the following describe biological evolution except

acquired characteristics are inherited by offspring

Studying the properties of genes in a population is

population genetics

According to the Hardy-Weinberg principle, the original proportions of genotypes in a population will remain constant as long as all of the following assumptions are met except

no selection occurs

An example of natural selection is the ability of prey to blend into their environment to increase survival. This is also known as

adaptation

Which of the following is not required for natural selection to happen?

high levels of parental investment are needed

Which is the most powerful agent of genetic change?

selection

Fitness is a combination of all the following except

sexual selection

Selection increases alleles that enhance survival while genetic drift is a random process where any allele may increase.

true

All of the following determine reproductive success except

how much immigration occurs

How do oscillating selection and frequency dependent selection differ?

fitness of a phenotype does not depend on frequency in oscillation selection

Secondary sex characteristics are important because

help attract members of the opposite sex

How can gene flow impede adaptation in a population?

allow inflow of inferior alleles

Negative frequency-dependent selection can make rare alleles more common in which way?

search image, resource competition

Similar genes found in different species are evidence of

common ancestry

Darwin’s idea that species are the twigs on a branching tree that shows common ancestry back to a single ancestor is

decent with modification

In humans, the pelvis and femur (thigh bone) are involved in walking. In whales, the pelvis and femur shown in the diagram are:

vestigial structures

According to the figure, modern whales have a reduced pelvis and femur. What does this evidence suggest about ancestors of modern whales?

Ancestors of modern whales probably has legs and lived on land

Structures that are similar in origin and structure, but not always in function are called __________ structures.

homologous

Scientists believe wings in different groups of organisms evolved independently of each other. This is an example of

analogous

Scientists use all the following as evidence of evolution except

inheritance of acquired traits

Adaptive radiation and artificial selection are two ways that ___________________ can occur.

divergent evolution

Why are intermediate forms of fossils important?

they show transitions in life

The study of diversification of living organisms using evolutionary relationships is

systematics

In a cladogram, the ____ shows where an ancestor evolved a specific physical trait.

stem