Practicing Success

Target Exam

CUET

Subject

Biology

Chapter

Biodiversity and Conservation

Question:

How does the current "Sixth Extinction" differ from the previous episodes of mass extinction in the history of life on Earth?

Options:

It is slower in rates of species loss.

It is unrelated to human activities.

It is characterized by random extinctions across taxa.

It is much faster in rates of species loss, and human activities are responsible for the faster rates.

Correct Answer:

It is much faster in rates of species loss, and human activities are responsible for the faster rates.

Explanation:

d) It is much faster in rates of species loss, and human activities are responsible for the faster rates.

The current "Sixth Extinction" event differs from the previous episodes of mass extinction in that the current species extinction rates are estimated to be 100 to 1,000 times faster than in the pre-human times, and human activities are responsible for the faster rates of extinction.

The current "Sixth Extinction" is different from the previous episodes of mass extinction in the history of life on Earth in a number of ways.

First, the current extinction event is happening much faster than the previous extinction events. The previous extinction events occurred over millions of years, while the current extinction event is happening over a few hundred years.

Second, the current extinction event is being caused by human activities. The previous extinction events were caused by natural events, such as asteroid impacts and volcanic eruptions.

Third, the current extinction event is affecting a wider range of species than the previous extinction events. The previous extinction events mostly affected marine species, while the current extinction event is affecting both marine and terrestrial species.

The current "Sixth Extinction" is a major threat to the planet's biodiversity and to the well-being of humanity. If we do not take action to reduce the rate of extinction, we could lose up to 75% of all plant and animal species by the end of the century. This would have a devastating impact on the planet's ecosystems and could lead to the collapse of entire food webs.