What characteristic distinguishes amphibians from birds and reptiles?

What characteristic do all the organisms on this cladogram share?

What number is the common ancestor of C and D

Identify ladybug B.

Which of the following organisms is M. erminea?

Identify leaf F

Which of the following is a centipede?

According to the classification key above, which pair of animals could be classified as mammals?

Biologist group living things based on ____.

What is the genus name here:

Canis lupus

Scientists group similar organisms together through a process called .....

Which of the following is a reason scientists use scientific names as opposed to their common names?

Phylogeny is usually represented by a tree diagram called a _________ - _____

In a phylogenetic tree, the branching points represent common ancestors.

Which group on the cladogram arose FIRST?

On the cladogram, which organism is the closest relative of the parrot?

All the animals to the right of the salamander would have the common characteristic of...

Which is the newest trait?

According to this phylogenetic tree, which creature is the least related out of all pictured?

According to this phylogenetic tree, which creature is the least related out of all pictured?

What is common ancestry?

According to the cladogram, which organism is most distantly related to the human?

A physical trait favored by an environmental change can be called an

Two populations of the same species are separated by land barriers like rivers or mountains.

After a long time in isolation, Island fruit flies and mainland fruit flies meet. They do not produce viable eggs due to genetic differences. The flies have resulted in two seperate lineages due to:

All of these finches have different shaped beaks, they are an adaptation to gain access of

According to the theory of natural selection, why are some individuals more likely than others to survive and reproduce?

Mutations are important because they bring about

Why has antibiotic resistance evolved in bacteria?

Genetic drift is change in the allele frequency of a population due to...

A(n)________ is a measure of how common a certain allele is in a population.

Which word means the formation of new species?

When members of two populations cannot successfully reproduce.

According to natural selection, light colored tree trunks would favor

Label the natural selection graphs correctly...

Starlings produce an average of five eggs. If there are more than five the parents cannot adequately feed the young. Fewer than five and predators may destroy them. As a result, five eggs becomes the most common number.

Seed cracker birds have either large beaks or small beaks. They do not have medium sized beaks because medium sized beaks do not allow for adequate cracking of seeds.

A scientist measures the circumference of acorns in a population of oak trees and discovers that the most common circumference is 2 cm. There are very few acorns with circumferences of 3 cm or circumferences of 1 cm. Only the 2 cm circumference acorns survive.

A population of Madagascar hissing cockroaches lives in a woodpile. The cockroaches are eaten by lizards. Because the lizards have small heads, the lizards are unable to eat the very largest adult cockroaches, and instead prey upon small and medium sized adults. Over time, only the large headed lizards survive.

Female birds that lay close to the optimum number of eggs have the most surviving offspring. Those that lay fewer or more eggs have lower relative fitness.

A population of birds with various size beaks eats seeds. Small seeds can be eaten by birds with small beaks. Larger, thicker seeds can only be eaten by birds with larger, thicker beaks. During a drought, only large thick seeds exist so only the large, thick-beaked birds survive.

Black rabbits (BB) and white rabbits (bb) are both able to survive because they can camouflage into the white and black rocks in their environment. However, the intermediate gray rabbits (Bb) do not survive. This results in only white and black rabbits.

Small lizards have difficulty defending territories so they end up dying out. Large lizards are more likely to be preyed upon by owls. Over time, only medium sized lizards end up surviving.

Women often have complications during labor while giving birth to very large babies, whereas very small babies tend to be underdeveloped. As a result, medium sized babies are the ones that end up surviving to adulthood.