Home
Class 12
BIOLOGY
What is common to Lantana, Eichhornia an...

What is common to Lantana, Eichhornia and Africa catfish?
(a) All are endangered species of India.
(b) All are keystone species.
(c) All are mammals found in India.
(d) All are species are neither threatened nor indigenous species of India.

A

All are endangered species of India.

B

All are keystone species.

C

All are mammals found in India.

D

All are species are neither threatened nor indigenous species of India.

Text Solution

Verified by Experts

The correct Answer is:
D

Lantana, Eichhornia and Africa catfish are exotic species. Non-native or exotic species are often introduced inadvertently for their economic and other uses. They often become invasive and drive away the focal species. These species are considered to be second major cause of extinction of spcies. Exotic species have proved harmful to both aquatic and terrestrial ecosystems.
Promotional Banner

Similar Questions

Explore conceptually related problems

What is alien species ? Name some invasive species in India.

Which species of plasmodium is most common in India ?

What is common to the following plants: Nepenthes Psilotum, Rauwolfia and Aconitum ? (a) All are ornamental plants. (b) All are phylogenic link species. (c) All are prone to over exploitation. (d) All are exclusively present in the Eastern Himalayas.

Which one of the following is an endangered plant species of India? (a) Rauwolfia serpentina (b) Santalum album (Sandalwood) (c) Cycas beddonei (d) All of the above

What is common to the seed banks, orchards, tissue culture and cryopreservation ? (a) All are in situ conservation methods. (b) All are ex situ conservation methods. (c) All require ultramodern equipment and very large space (d) All are methods conservation of extinct organisms.

The collection of all genes of a population of species.

Assertion : The Nile perch introduced into lake Victoria in east Africa led to the extinction of an ecologically unique assemblage of more than 200 species of cichlid fish in the lake. Reason : When alien species are introduced deliberately for economic or other uses, they often become invasive and cause extinction of indigenous species. (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c) If assertion is true but reason is false. (d) If both assertion and reason are false.

One of the ex situ conservation methods for endangered species is (a) Wildlife sanctuaries (b) Biosphere reserves (c) Cryopreservation (d) National parks.