Unit Test — Cumulative exam Answers

Look at the two images of cells.Which of the following statements best describes what can be seen in the images?

The fossil record shows that the average size of black bears was large during cold glacial periods and got smaller during warmer time periods. What is this an example of?

A student argues that two species of birds are the same species because they have similar body structures, similar DNA, and similar beaks. Another student argues that the birds are different species because they have different color patterns and have a different mating season. Which piece of evidence supports the second student's argument?

Which factors affect natural selection?

Variations within a species are an important part of Charles Darwin's theory of evolution. Which example can be explained by individual variation?

These notes were taken during a class about biological evolution, but the subject title is missing. -results from immigration -new genes brought into a population -variation in a population increasesWhat do the notes describe?

When a plant produces sugars and transports them during translocation, which main plant tissues are at work?

Growth of chest hair, deepening of the voice, and muscle growth are secondary sex characteristics. Which structure or structures produce substances most likely to affect the development of these traits?

In the heart, one ventricle pushes blood with oxygen to the cells of the body. Where does the other ventricle push the blood without oxygen?