Tag: environmental science

Questions Related to environmental science

Which of the following is correct?

zoology selection and evolution extinction extinctions environmental science

  1. 99% of existed species are extinct.

  2. 25% of existed species are extinct.

  3. 40% of existed species are extinct.

  4. 30% of existed species are extinct.

Show answer
Correct Option: A
Explanation:

Around 99% of all species which amounts to over 5 billion species which ever lived on Earth are said to be extinct. The current number of species present on Earth is estimated to be 10-14 million. Hence option A is correct.

Which of the following is included in those species which are likely to become extinct?

zoology selection and evolution extinction extinctions environmental science

  1. Endangered species

  2. Critically endangered species

  3. Vulnerable species

  4. All of the above

Show answer
Correct Option: D
Explanation:

The species (including animals, plants, fungi, etc.) which are vulnerable to endangerment in the near future are known as threatened species. The International Union for Conservation of Nature (IUCN) is the authority on threatened species, and it treats threatened species as a group of three categories, depending on the degree relative to which they are threatened. Those categories are Vulnerable species; Endangered species and Critically endangered species. 

So, the correct answer is 'All of the above'.

Carbon dating is useful for measuring age of a fosil/skeleton/article between

zoology selection and evolution extinction extinctions environmental science

  1. 500,000 - 50,000,000 years

  2. 50,000 - 500,000 years

  3. 1000 - 50,000 years

  4. 1 - 1000,000 years.

Show answer
Correct Option: C

An instrument which measures concentration of C-14 directly is

zoology selection and evolution extinction extinctions environmental science

  1. Accelerator mass spectrometer

  2. Spectroscope

  3. Geiger counter

  4. All the above.

Show answer
Correct Option: A

Stratigraphy is the study of

zoology selection and evolution extinction extinctions environmental science

  1. Earth's crust

  2. Sedimentary rocks

  3. All type of rocks

  4. Underground water.

Show answer
Correct Option: B

Which of the following is the tallest tree of the world?

zoology selection and evolution extinction extinctions environmental science

  1. Eucalyptus regnans

  2. Sequoia sempervirens

  3. Pinus longifolia

  4. Pinus roxburgii.

Show answer
Correct Option: A
Explanation:

The tallest trees in the world are redwoods (Sequoia sempervirens), which tower above the ground in California. These trees can easily reach heights of 300 feet (91 meters).


So, the correct option is 'Option A, Eucalyptus regnans'.

Which one has undergone anthropogenic extinction?

zoology selection and evolution extinction extinctions environmental science

  1. Mastadon

  2. Caspian tiger

  3. Wooly mammoth

  4. Giant sloth

Show answer
Correct Option: B
Explanation:

Caspian tiger has undergone anthropogenic extinction. The anthropocene extinction, is the ongoing extinction event of species during the present holocene epoch, mainly as a result of human activity. It is also called as the holocene extinction or as the Sixth Extinction. Reasons for such extinction include land development, overexploitation, species translocations and introductions, and pollution.
So, the correct answer is 'Caspian tiger'.

Number of eras in phanerozoic is

zoology selection and evolution extinction extinctions environmental science

  1. 4

  2. 3

  3. 2

  4. 1.

Show answer
Correct Option: B

Neanderthals were adopted to live under

zoology selection and evolution extinction extinctions environmental science

  1. Hot and humid climate

  2. Hot and dry climate

  3. Cold environment

  4. Mild climate.

Show answer
Correct Option: C

An old city got buried under lava was

zoology selection and evolution extinction extinctions environmental science

  1. Old Rome

  2. Pompeii

  3. Asurus

  4. Old Foundland.

Show answer
Correct Option: B