Environmental Studies · Biology

Biodiversity and Conservation

2,266 Questions

Biodiversity and conservation questions address threats to ecosystems, climate change impacts, and habitat loss. These topics are essential for environmental science sections in major competitive exams. Practicing these questions clarifies concepts regarding species extinction and ecological management.

Habitat loss consequencesClimate change impactsEcosystem degradation causesDesert biodiversity threatsForest diversity threatsResource extraction effects

Biodiversity and Conservation Questions

Multiple choice

The term extinct refers to organisms that are

  1. not living on earth now

  2. few and need to be saved

  3. abundant on the earth

  4. found at one place on the earth

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Extinction is the end of an organism or of a group of organisms (taxon), normally a species. An extinct species is one that no longer has any living individuals on Earth.

Multiple choice

The Olive Ridley Turtles population decreased at an unprecedented rate during the 1970s and 1980s and reached its all-time low in the early 1990s. Environmental Scientists determined that the decrease in population was due to the national policy that permitted fishing in coastal areas with drift nets.

Which of the following, if true, would most strengthen the assertion made by the scientists?

  1. The fishing in coastal areas with drift nets policy did not extend to the Southern coast.

  2. In the time since the fishing in coastal areas with drift nets policy was revoked in 1993, the population of Olive Ridley Turtles has grown at a steady rate.

  3. Olive Ridley Turtles like other reptiles, breed where very little food is available.

  4. The various smaller fish - sea dwellers that constitute the Olive Ridley Turtle's diet - felt no adverse effects from the fishing in coastal areas with drift nets policy.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This tells us that when the fishing policy was revoked, the Olive Ridley Turtles population began to increase. This supports the scientists' assertion that the fishing policy was causing the decrease in population.

Multiple choice

What do you mean by Endemic species?

  1. Species which do not adjust to enviromental changes and so their population decreases.

  2. Species which disappear from earth.

  3. Species that are found only in a particular area.

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Yes, this is correct , they are not distributed uniformally around the globe.

Multiple choice

The corals suffering the stress of pollution, overfishing, and climatic change are more susceptible to get affected from

  1. black band disease

  2. skeletal eroding band disease

  3. white band disease

  4. yellow-band disease

  5. white pox disease
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Yellow-band disease is a disease that attacks colonies of coral at a time when coral is already under stress from pollution, overfishing, and climate change. It is characterised by large blotches or patches of bleached, yellowed tissue on Caribbean scleractinian corals.

Multiple choice

What has led to the unchecked growth of the marsupial population?

Directions: Read the passage and answer the question that follows.

The dog fence in Australia has been erected to keep out hostile invaders, in this case hordes of yellow dogs called dingoes. The empire it preserves is that of wool growers. Yet the fence casts a much broader ecological shadow. For the early explorers, a kangaroo or a wallaby sighting marked a noteworthy event. Now try not to see one. Without a native predator there is no check on the marsupial population. The kangaroos are now cursed more than the dingoes. They have become rivals of sheep, competing for water and grass. The State Governments now cull more than three million kangaroos a year to keep Australia’s natural symbol from over running the pastoral lands.

  1. the building of fences

  2. the absence of native predators

  3. the culling of kangaroos

  4. the availability of water and grass
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mentioned in lines 4-5 of the passage.

Multiple choice

Which of the following activities puts the greatest number of animals at risk for extinction?

  1. Destruction of habitat

  2. Hunting and fishing

  3. Making pets of wild animals

  4. Building fences
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Habitat destruction is the leading cause of species extinction because it removes the resources, shelter, and space animals need to survive. While hunting and other factors impact populations, habitat loss has the most widespread and permanent effect.

Multiple choice

Which is the best way to get rid of invasive species?

  1. Kill all species, native and invasive

  2. Use chemicals to get rid of species

  3. Bring in predators to balance the invasive species
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Biological control, such as introducing natural predators, is a common and effective method for managing invasive species without relying solely on harmful chemicals.

Multiple choice

Why are invasive species overpopulating areas?

  1. They hoard resources

  2. They have no natural predators

  3. They kill all the native species
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Invasive species often thrive in new environments because they lack the natural predators and diseases that kept their population in check in their original habitat.