Biodiversity

 Which biome is more likely to survive a change in the environment?

• High (rich) biodiversity
• Low (poor) biodiversity

What does biodiversity mean?

• Only one species in an area.
• The different amount of species in an area
• All abiotic life
• Nitrogen fixation

The lionfish is a venomous fish found primarily in the Red Sea and the Indian Ocean. In the 1990s, lionfish were accidentally released into the Atlantic Ocean, where they found abundant resources and favorable environmental conditions. Which of the following scenarios is most likely to result in the lionfish having a major impact on the communities into which they were introduced?

• With no natural predators, the lionfish population will become very large.

• Some native species of invertebrates will develop a resistance to lionfish venom.

• Random mating will allow the lionfish population to reach Hardy-Weinberg equilibrium.

• A virus that specifically infects lionfish will become more prevalent.

There is strong evidence that two species of

cliff-dwelling birds have nested in the same

environment and fed in the same water for

thousands of years, with each having stable

population sizes. Based on this information,

which of the following statements is the best

conclusion?

• The two birds compete for food.

• One species will displace the other.

• The two birds have different ecological niches that allow coexistence.

• One species eats a more diverse diet than the other does.

Which of the following is NOT related to biodiversity?

• species diversity 
• genetic diversity 
• climate diversity 
• ecosystem diversity 

Fishermen have harvested certain fish to the point where the population of that fish is decreasing. This level of direct harvesting could cause

• ecosystems to be improved for future generations
• ecosystems to be severely damaged
• the restoration of environmental stability
• all other fish species to increase in number

During a landslide, many tons of rock slide down a hill in a very short time. A landslide would MOST LIKELY force animals living in the area to —

• move to a new area
• uncover all the buried plants
• develop new adaptations
• develop different types of diets

Which of the following is NOT associated with a loss of biodiversity?

• increased ecosystem stability
• extinctions
• loss of natural resources 
• loss of potential foods & medicines 

Human impact on the environment is often more dramatic than the impact of most other living things because humans have a greater

• need for water

• need for food

• ability to alter the environment

• ability to adapt to change

The tall wetland plant, purple loosestrife, was brought from Europe to the United States in the early 1800s as a garden plant. The plant's growth is now so widespread across the United States that it is crowding out a number of native plants. This situation is an example of

• an unintended effect of adding a species to an ecosystem

• the results of the use of pesticides

• the recycling of nutrients

• the flow of energy present in all ecosystems