Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice biology reproduction in living organisms regeneration asexual modes of reproduction reproduction in animals

Autotomy is recorded in

  1. Legs in crabs

  2. Tail of lizards

  3. Viscera in holothurian echinoderms

  4. All the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The spontaneous removal or casting off of a body part, especially when the organism is injured or under attack is autotomy or self ampulation. It is recorded in loss legs in crabs, loss of tails in lizards, loss of viscera in Holothurian echinoderms.

So, the correct option is ‘All the above’.

Multiple choice biology reproduction in living organisms regeneration asexual modes of reproduction reproduction in animals

Morphallaxis is reported in

  1. Porifers

  2. Coelenterates and flatworms

  3. Nemarteans and some ascidians

  4. All the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The reconstruction of an entire animal from a small fragment by reorganizing the existing cells, is called Morphallaxis. The regenerated animal is far smaller than the original one after the completion of the process. It grows to attain the normal size. It is reported in Porifers, Coelenterates, flatworms, Nemarteans, and some ascidians.

So, the correct option is ‘Porifers, Coelenterates, flatworms, Nemarteans, and some ascidians’.

Multiple choice biology reproduction in living organisms regeneration asexual modes of reproduction reproduction in animals

Formation of whole body from a fragment is

  1. Morphallaxis

  2. Epimorphosis

  3. Epigenesis

  4. Auxetic growth
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A. Morphallaxis - The reconstruction of an entire animal from a small fragment by reorganizing the existing cells, is called Morphallaxis.

B.Epimorphosis - The regeneration of tissues or organs through the dedifferentiation of existing, differentiated adult tissues

C.Epigenesis - The theory, now generally held, that an embryo develops progressively from an undifferentiated egg cell.

D. Auxetic growth – Growth takes place by the influence of auxins.

So, the correct option is ‘Auxetic growth’.

Multiple choice biology main natural resources classification of threatened species red data book methods of conservation

Organisation responsible for maintaining Red Data Book is  

  1. IUCN

  2. WWF

  3. CITES

  4. IBWL.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The IUCN Red List of Threatened Species (also known as the IUCN Red List or Red Data List), founded in 1965, has evolved to become the world's most comprehensive inventory of the global conservation status of biological species. It uses a set of criteria to evaluate the extinction risk of thousands of species and subspecies. These criteria are relevant to all species and all regions of the world. With its strong scientific base, the IUCN Red List is recognized as the most authoritative guide to the status of biological diversity. A series of Regional Red List are produced by countries or organizations, which assess the risk of extinction to species within a political management unit. The IUCN Red List is set upon precise criteria to evaluate the extinction risk of thousands of species and subspecies. These criteria are relevant to all species and all regions of the world. The aim is to convey the urgency of conservation issues to the public and policy makers, as well as help the international community to try to reduce species extinction. 
So the correct option is 'IUCN'.
Multiple choice biology conservation of plants and animals classification of threatened species red data book methods of conservation

IUCN stands for

  1. Indian Union of Chemical Nomenclature

  2. Indian Union for Conservation of Nature

  3. International Union for Conservation of Nature and Natural Resources

  4. International Union for Conservation of Nutrients
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

IUCN stands for International Union for Conservation of Nature and Natural Resources. It 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. As per the Red list of 2000, there are 11,096 threatened species.

So, the correct answer is 'International Union for Conservation of Nature and Natural Resources'.

Multiple choice biology main natural resources classification of threatened species red data book methods of conservation

Man and Biosphere Programme started in

  1. 1971

  2. 1976

  3. 1986

  4. 1996
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Launched in 1971, UNESCO's Man and the Biosphere Programme (MAB) is an intergovernmental scientific programme that aims to establish a scientific basis for the improvement of relationships between people and the environments.
So, the correct answer is "1971".