Home
Class 12
BIOLOGY
Assertion :Species with low genetic vari...

Assertion :Species with low genetic variability are generally at greater risk of extinction than the species with more genetic variability.
Reason: Species with low genetic variability are more vulnerable to disease, predators or other environmental challenges.

A

a) If both assertion and reason are true and reason is the correct explanation of assertion.

B

b) If both assertion and reason are true but reason is not the correct explanation of assertion.

C

c) If assertion is true but reason is false.

D

d) If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
A

Species with low genetic variability are generally at significantly greater risk of extinction than the species with more genetic variability, simply because they have a more limited arsenal with which to respond to the varieties of environmental change. Species with extremely low genetic variability are particularly vulnerable towards a new disease, predator or other environmental challenges, e.g., lack of genetic variability in the African cheetah (Acinonys jubatus) has been considered to be a significant factor contributing towards decline of cheetah population.
Promotional Banner

Similar Questions

Explore conceptually related problems

Assertion: Variations are important for the process of evolution. Reason: Meiosis increases the genetic variability in the population of organisms from one generation ot the next.

Western ghats have a greater number of amphibian species than the Eastern ghats. What kind of diversity does it represent ? (a) Species diversity (b) Genetic diversity (c) Ecological diversity (d) None of these

Introduction of alien species into new area poses a threat to extinction of indigenous species due to (a) their high nutrient requirement (b) their symbiotic relationship (c) absence of their natural predators (d) more intraspecific competition.

Assertion : Critically endangered category includes the species which have sufficient populationa at present but is undergoing depletion due to some factors. Reason : Vulnerable category includes the species which are facing very high risk of extinction in the wild an can become extinct any moment. (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.

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.

The colonisation of tropic pacific islands by humans have ' resulted in the extinction ' of more than _______________ species of native birds

What evidence suggest that chimpanzee is more closely related to human than other hominid species?

Assertion : Asexual reproduction is more important with regard to biotehnology. Reason : Asexual reproduction preserves the genetic information while sexual reporduction permits variations.

Assertion : Genetic variation shown by the plant Rauwolfia vomitoria growing in different Himalayan ranges is very important economically. Reason : The amount and variety of alkaloids presents in this plant, change both between the Rauwolfia species and between the different strains of R. vomitoria.

Assertion : Broadly utilitarian arguments say that we should conserve biodiversity because biodiversity plays a major role in many ecosystem services that nature provides. Reason : Expolration of molecular, genetic and species level diversity to obtain the products of economic importance is include under broadly utilitarian category. (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.