Global Species - Marvel EDU

Loading question...

You are in free guest mode. Timed Practice Revision List Attempt History Progress Tracking Create a free account to unlock these tools

Prev Next

Practice Reading: Multiple Choice, Single Answer ID: #5581 Global Species

Instructions ›

Read the text and answer the multiple-choice question by selecting the correct response. Only one response is correct.

There are innumerable different species on the planet. Nobody really knows how many species there are, although many scientists have tried to estimate it. However, the complexity of trying to do this makes it impossible to establish a definitive number with any confidence. This is probably due to the fact that new species are continually appearing, while at the same time existing species evolve and some become extinct. In the past, the number of new species appearing exceeded the number of those dying out. Nowadays, however, due to human activity, this trend has reversed and as a result we are in danger of seriously disturbing our ecosystem.

Why is it difficult to establish the number of species globally?

* Click on the correct answer

There are too many species to count them all. The number of species is constantly changing. Currently, more species are appearing than are becoming extinct. Human action has upset the balance of the natural environment.

Result:

AI explanationShows the answer. Tap to open.

Option 2: "The number of species is constantly changing."

Explanation: This option accurately reflects the main idea of the text, which states that new species are continually appearing while others evolve or become extinct. This constant change makes it impossible to establish a definitive number of species, aligning perfectly with the text's explanation of the complexities involved.

Option 1: "There are too many species to count them all."

Explanation: While it is true that there are many species, the text emphasizes that the difficulty in establishing a number is due to the constant changes in species, not merely their quantity. This option oversimplifies the issue and does not address the dynamic nature of species populations.

Option 3: "Currently, more species are appearing than are becoming extinct."

Explanation: This statement is incorrect as the text indicates that the trend has reversed; currently, more species are becoming extinct than are appearing. Therefore, this option contradicts the information provided in the text.

Option 4: "Human action has upset the balance of the natural environment."

Explanation: Although the text mentions human activity affecting the ecosystem, this option does not directly address the question of why it is difficult to establish the number of species. It provides a relevant fact but fails to connect it to the main issue of changing species numbers.

The rest of this explanation is for members. Sign in free to read why the other options are wrong, key words and tips.

With a free account: Retry and compare every attempt.

Be the first! No community answers here yet. Submit yours and help others learn.

How difficult was this question?

Others found: 100% Easy · 0% Medium · 0% Hard

Saving...