Organism A and Organism B share 2 classification levels whereas Organism A and Organism C share 5 classification levels. What conclusion can you make about these species?

A group of students are preparing to create a dichotomous key to help them identify and classify the plant species around their school. Three groups have come up with a list of items to use for the key. Observe the table above. Which group has the best list for identifying a common plant?

You are looking at a sample of cells under a microscope. You notice the cells are very similar. Each cell has a cell wall, a cell membrane, and ribosomes. None of the cells have a nucleus. From your observations, what conclusion can you make about your cell sample?

Because the microscope was invented, scientists have been able to learn more about living things. Once scientists discovered structures like the cell wall, the nucleus, and the chloroplast, they were able to do which of the following?

Which animal has 8 legs, one oval-shaped body region, and is less than 1 millimeter long?

Describe the characteristics of a centipede.

Which of the following features does a Scorpion possess?

Which of the following organisms being described: has only 8 legs, has two body regions, and has no claw like pincers?

What can you infer about an organism with the name Homo neanderthalensis?

While studying habitats, your class took samples from the stream near your school to learn more about the school’s habitat. You and your lab partner are looking at the stream water under a microscope. You observe several organisms similar to the one pictured above. What conclusion can you make based on your observations?

Your friend is studying the plant and animal kingdoms. He is comparing and contrasting the two kingdoms. He has easily found some differences but is having trouble on the similarities. Which of the following statements would be helpful to your friend?

What characteristic do all of these animals have in common?

What organism is more closely related to rabbits than to any other organism in the diagram?

When a paramecium, a single-celled organism, is living under stressful conditions, it sometimes switches from asexual to sexual reproduction. The main advantage when this switch occurs is that the paramecium is most likely to...

You are hiking in Yellowstone National Park. A park ranger is speaking to students visiting a hot spring. She said some microscopic organisms can live in the hot springs. In what domain do these organisms most likely belong?

Carla was taking notes in science class on the different kingdoms of living things. She was so tired that she fell asleep and missed some of the notes. She was not able to get the correct information before class ended. Which 2 of the following notes are incorrect? Choose the two best answers.

Which of the following best describes the relationship between variations and adaptations?

Moles are mammals that live underground and eat worms and other insects. The moles locate their food using their sense of smell. Which environmental change would best explain an increase in the number of moles born with a better sense of smell?

A species of frog lives in a forest. A snake species moves to the ecosystem where the frogs live and begins to hunt the frogs. Using your understanding of natural selection, what is the most likely explanation of what will happen to the frog population when the snakes, who are predators and will hunt the frogs, move into the ecosystem?

Which of the following statements is true regarding natural selection?

A mutation causes a new fur color variation to appear in a mouse population. In which of the situations described below would the new fur color become more common than the old color in the mouse population?

According to Darwin's theory of natural selection, the individuals that tend to survive are those that have…

Over time, the food supply for birds on an isolated island has changed. The supply of insects, small tender seeds, and vegetation has shrunk, whereas the supply of tough, large, hard seeds has remained unchanged. Over several generations, variations in genetic traits of birds' beaks have occurred. Which beak shape is the MOST LIKELY result of this change to the environment?

Prior to the Industrial Revolution in England, the light version of the moth was the most common, and the dark version was mostly unknown. As a result of pollution caused by the burning of coal, the population of dark moths increased so that they were the dominant form in most areas by the end of the nineteenth century.

Which statement MOST LIKELY explains the rapid evolution of dark moths?

The graph below average beak sizes of a group of finches on one island over several years. Use the graph to answer the question.

Which of the following statements BEST summarizes this data?

A mouse population has various traits within its members. The mice have different fur colors, speeds at which they run, and different tolerances to a lack of food. If a new predator is introduced to the environment, which mice would be MOST LIKELY to survive?

A group of plant eating animals are separated from their population. In the new environment, the only edible vegetation grows at the top of tall trees. Which of the following variations would be most useful adaptation to members of the group?

A group of guppies is separated into a small pond and a large pond. In the larger ponds, the fish must avoid predators that also live in the pond and spend much of their time hiding. In the smaller ponds, there are no predators and the male fish compete for female fish mates. In both ponds, the male fish have long, decorative tails that they use to attract females. The tails of males in the small ponds have an average length of 10cm. The tails of males in the large ponds have an average length of 6cm. Male and female fish from a large pond are captured and placed into a small pond where there are no other predators.

Which of the following best predicts and explains how the average tail length in males might change over many generations when the group of fish moved to the new small pond?

In a tropical forest, a type of beetle spends time on the brown trunk of trees where it lays eggs and rests as well as on the green leaves, where it feeds. The beatles are green in color, providing camouflage on the leaves but not the trunk of the tree. Four sets of data were collected in a survey of the beatles. The location and total number of beetles on the leaves and on the trunks of 10 trees in each location were tallied and the mean number of beetles on the leaves and trunk at each location was calculated. Analyzing the calculated means, which location likely has the largest population of beetle predators?

Read the passage and review the line graph below to answer the question.

A building company purchases a large plot of undeveloped land with the intention of building a new residential neighborhood. When first purchased, the land appears forest like. In this forest like area resides two types of squirrels: tree squirrels and ground squirrels. Tree squirrels have bushy tails, longer legs, sharp claws for climbing, and large ears. Ground squirrels have shorter legs, less sharp claws, and less bushy fur.

The company knocks down 80% of the trees and builds a subdivision of 100 houses within 2 years.

Which squirrel population was better fit for the change of the environment?

Fossils found in Earth’s sediment give us clues to Earth’s past. Based on the fossil record, what conclusions can be drawn about the changes in this area over millions of years?

Which of the following could a scientist MOSTLY LIKELY discover from a careful examination of the fossil record?

Which layer is the youngest? 5

For any fossil found in layer 4, what layer would most likely contain the ancestors of that fossil organism?

Species often go extinct when they are unable to adapt to changing environmental conditions. The table below lists the number of species of various animals that have become extinct in different parts of the world since 1600.