Unit Test — Cumulative exam Answers

Two cells in the same organism differ only in the number of chloroplasts they contain. The first cell has multiple chloroplasts, and the second cell has very few. What would most likely characterize these cells?

Which rocks will likely weather the least?

Which best describes the relationship between two species and a niche?

What is the primary source of energy for food chains in an ecosystem?

A relationship in which one organism benefits while the other is neither harmed nor helped is called

Which organelle can be compared to a security guard who decides whom may enter a building and whom may not?

Which microscope uses a probe to map atoms on the surface of a specimen?

Which answer gives both a positive impact and a negative impact associated with the effects of nitrogen- and phosphorus-enhanced fertilizers?

Which does not occur during translation?

Humans affect the carbon cycle in many ways through the use of fossil fuels, clear cutting of forests, and controlled burns. Which process can help counteract these human interactions?

In what respect is a mycelium and a fruiting body similar?

Water exits the leaves of plants and enters the atmosphere. What is this process called?

A new multicellular organism has been discovered, and scientists want to study the organism’s cell structures, including organelles. Which microscope should they use?

Which two microscopes generate three-dimensional images?

The coyote's diet includes a wide variety of small mammals, livestock, birds, reptiles, carrion, fruit, and vegetables. It is one of the few animals that has enlarged its range since human encroachment began. Which is the most likely reason for this?

Which step in transcription occurs first?

The tundra ecosystem of Alaska is known as a “cold desert.” It receives very little precipitation, about four inches annually. However, it is rich in wetlands due to permafrost, which traps moisture close to the surface. The temperatures vary widely, also producing persistent winds. Although treeless, the Arctic tundra is an abundant ecosystem. Many organisms find their niche here including many migratory bird species and mammals such as caribou, foxes, bears, and small rodents. Which factor of the tundra ecosystem is biotic?

Which animals use the specialized roles of diver and barrier while participating in cooperative hunting?

An animal cell (left) and a plant cell (right) are shown.Which organelle, labeled X in the diagram, is found in both plant and animal cells?

What is the maximum magnification of most classroom compound light microscopes?