Biology Test Practice

How do scientists know that some mountains were once at the bottom of

an ocean?

• Freshwater rivers flow to the ocean

• Saltwater fish are found in some mountain streams

• Dinosaur bones have been discovered in the mountains

• Marine fossils have been found on the peaks of some mountains

Which best describes how ice cores are important to the study of geologic history?

• They hold index fossils, which are used to date the different ice cores

• They show unconformities, which signal changes in deposition

• They contain evidence showing changes in the atmospheric composition over time

• They follow the Law of Superposition, which gives reasons for extinctions of species

Which statement best describes the Law of Superposition?

• Each sedimentary layer of rock represents 1,000 years of Earth’s age, much like the rings of a tree

• In undisturbed layers of sedimentary rock, the lowest layers contain the older rocks.

• Rocks that form near volcanoes are older than surrounding rock.

• In undisturbed layers of sedimentary rock, the upper rock layers are older than the lower rock layers

What can be used to find the exact age of a rock specimen?

• ice cores

• index fossils

• radioactive dating

The diagram shows the distribution of water on Earth. Where is most of the fresh surface water located on Earth?

• Ice caps

• Oceans

• Groundwater

• Lakes

What happens to a population and to competition when there is a reduction of living space?

• The population expands and competition intensifies

• Competition weakens and the population decreases.

• The population increases as competition decreases

• Competition strengthens while the population contracts.

Which best explains the importance of nitrogen in the cycling of energy and matter?

• Nitrogen increases the effectiveness of photosynthesis

• Nitrogen decreases protein production in plants

• Nitrogen decreases protein production in plants

• Nitrogen decreases the effectiveness of photosynthesis

Where is the largest amount of energy found in this food web?

• grasshopper

• grass

• mouse

• hawk

When animals break down glucose to create energy, they release water

and carbon dioxide (CO2 ) How can carbon dioxide (CO2 ) be reused within

the food web?

• It can be used by both plants and animals to produce energy.

• It can be used by animals as a source of oxygen.

• It can be used by plants during photosynthesis to create glucose

If wolves prey on deer for food, what will most likely happen to the deer

population if wolves are removed from an area where deer live?

• The population of deer will become extinct

• The population of deer will remain the same

• The population of deer will increase

• The population of deer will decrease