Biodiversity Summative Test

Which of the following is a primary factor causing loss of biodiversity?

• Natural Disasters

• Climate Change

• Hunting

• All of the above

What is the role of decomposers in an ecosystem?

• They break down dead organisms and waste, returning nutrients to the soil

• They consume other organisms for energy

• They produce their own food through photosynthesis

• They regulate the population of other organisms through predation

Succession in an area that was not previously inhabited is called ___________.

• succession
• primary succession
• pioneer species
• secondary succession

Building a highway through a forest is an example of

• biomagnification
• eutrophication
• habitat fragmentation
• poaching

The loss of biodiversity could lead to which of the following?

• speciation
• genetic diversity
• stable ecosystems
• extinction

Tropical rain forests have the greatest biodiversity of any type of land ecosystem. How does biodiversity contribute to the sustainability of an ecosystem?

• The presence of more species with different adaptations makes it more likely that some organisms will survive an ecological disaster.
• Greater genetic variation within species makes it more likely that some individuals will survive a disease outbreak.
• The presence of a variety of herbivore species that can feed on a large number of different producer species helps ensure abundant prey for predators in the ecosystem.
• All of the above

Which of the following is a consequence of habitat destruction?

• Increase in biodiversity

• Decrease in species extinction

• Disruption of ecosystem services

• Increase in habitat fragmentation

What is the main difference between primary and secondary succession?

• Primary succession occurs after a disaster, while secondary succession occurs in undisturbed areas.

• Primary succession begins with bare rock, while secondary succession begins in areas with existing soil.

• Primary succession leads to a decrease in biodiversity, while secondary succession leads to an increase in biodiversity.

• Primary succession occurs in water, while secondary succession occurs on land.

Which of the following is an example of a behavioral adaptation?

• A turtle's hard shell

• A cheetah's fast speed

• A bear hibernating in winter

• A bird's ability to fly

Surtsey is an island located south of Iceland. The island was formed by a volcanic eruption and first appeared in 1963. The table below contains descriptions of changes in the population and diversity of species on Surtsey. Which of these lists the descriptions in the correct order of ecological succession on Surtsey?

• I, II, IV, III
• III, I, II, IV
• IV, III, I, II
• II, IV, I, III