Bioninja Biodiversity, Extinction, Climate Change

Multiple Choice

Which of the following does not contribute to ecosystem stability?

• Genetic diversity

• Climatic variables outside limits of tolerance

• Recycling of inorganic nutrients

• A supply of energy

Multiple Choice

Which of the following can exhibit biodiversity?

I. The genome of a species.

II. The morphology of a species.

III. An ecosystem.

IV. A population

• I and IV only

• I, II and III only

• II, III and IV

• All of the above

Multiple Choice

Why does biodiversity increase ecosystem stability?

• It preserves top carnivores.

• It increases populations of producers.

• It promotes recovery of ecosystems from seasonal or temporary changes.

• It increases population numbers.

Multiple Choice

In Botswana, forest cover decreased from 18.8 million hectares to 15.3 million hectares between 1990 and 2020. Calculate the percentage loss in forest cover during this period.

• 19%

• 81%

• 123%

• 43%

Multiple Choice

Which of the following should be kept in mind when designing nature reserves?

I. Smaller habitats promote biodiversity

II. The nature reserve should be actively managed, for example removing invasive species

III. Habitat corridors between fragmented parts of a habitat can enhance genetic diversity

• II only

• II and III only

• I and III only

• I, II, and III

Multiple Choice

Which of the following are correct in regard to EDGE species?

I. Their genome is relatively unique.

II. Their morphology is common to several species.

III. They are producers in the ecosystem.

IV. They are endangered.

• None of the above.

• II and III only.

• II, III and IV only.

• I and IV only.

Multiple Choice

Which of the following is an example of insitu conservation of biodiversity?

• Minimising pollution

• Rewilding

• Creating seed banks

• Zoo breeding programmes.

Poll

How do you feel about the topic of biodiversity?

• I could teach it!

• I think I got it!

• I little iffy on it!

• I am lost!

• What class is this?

Poll

How do you feel about the topic of human impact and conservation?

• I could teach it!

• I think I got it!

• I little iffy on it!

• I am lost!

• What class is this?

Multiple Choice

Which property of a pollutant like mercury allows it to undergo biomagnification?

• The pollutant is water-soluble and easily excreted by organisms.

• The pollutant is fat-soluble and resistant to metabolism.

• The pollutant is in a volatile gaseous form that can be readily absorbed.

• The pollutant is a large, complex molecule that cannot pass through cell membranes.

Multiple Choice

Which of the following contribute to the problem of microplastic pollution in marine environments?

I. Persistence of microplastics.

II. Biodegradability of microplastic.
III. Non-biodegradability or microplastic.

IV. Increased biochemical oxygen demand.

• All of the above

• IV only

• I and III only

• I, III and IV only

Multiple Choice

Why does leaching of nitrogen and phosphate fertilisers lead to an increase in the Biochemical Oxygen Demand (BOD) of local freshwater ecosystems (lakes and rivers)?

• It increases the rate of photosynthesis of producers.

• It decreases the population of producers.

• It increases the population of saprotrophic bacteria.

• It deceases the fish populations

Poll

How do you feel about pollution, biomagnification, and CO2 emissions?

• I could teach it!

• I think I got it!

• I little iffy on it!

• I am lost!

• What class is this?

Multiple Choice

The anthropogenic greenhouse effect is caused by which of the following?

I. Fossil fuel combustion

II. Volcanic activity

III. Intensive agriculture

• I only

• I and III only

• II and III only

• I, II and III

Multiple Choice

How does increased atmospheric carbon dioxide concentration contribute to the process above?

• By increasing Zooxanthellae photosynthesis rate

• By increasing water temperature

• By reducing light penetration

• By increasing water salinity

Multiple Choice

How does increasing ocean acidification affect the ability of corals to build and maintain their calcium carbonate skeletons?

• Increased availability of carbonate ions promotes faster calcification in corals.

• Higher levels of dissolved CO₂ provide more carbon for coral photosynthesis and growth.

• The decrease in pH and free carbonate ions makes it more difficult for corals to calcify.

• Ocean acidification has no significant impact on the calcification process in corals.

Multiple Choice

What causes decalcification of corals leading to collapse of coral ecosystems?

• Coral bleaching

• Ocean acidification.

• Global warming

• The El Nino effect.

Multiple Choice

Which of the following are affected by increased melting of ice shelves?

I. Breeding habitats for penguins.

II. Hunting areas for polar bears.

III. Primary production of marine algae.

IV. Sea ice habitat for walruses.

• IV only

• I, II and IV only

• II and III only

• I and II only

Multiple Choice

Which of the following is produced by anaerobic fermentation but not by combustion?

• oxygen

• methane

• ethanol

• nitrogen

Multiple Choice

Which factor is a cause of the change in Boreal forests from net carbon accumulation to net loss? .

• Increased photosynthesis.

• More frequent forest fires.

• Increased respiration in trees.

• Afforestation.

Poll

How do you feel about pollution, biomagnification, and CO2 emissions?

• I could teach it!

• I think I got it!

• I little iffy on it!

• I am lost!

• What class is this?

Word Cloud

What do you still have questions about after these notes?