Tag: zoology

Questions Related to zoology

What is the approximate ratio of animals and plants species in our country? 

zoology biodiversity, classification and conservation levels of biodiversity environmental conservation and biodiversity biodiversity on earth and in india

  1. 3 : 1

  2. 2 : 1

  3. 1 : 3

  4. 1 : 2

Show answer
Correct Option: B
Explanation:

India is very rich in varieties of animals and plants species. Around 47,000 species of plants and twice the number of  animals have been recorded in India. Around 81,000 species of animals have been recorded in India. Hence, the ratio of animals and plants species in India is 2:1.

Thus, the correct answer is '2:1.'

Choose the wrong statement.

zoology biodiversity, classification and conservation levels of biodiversity environmental conservation and biodiversity biodiversity on earth and in india

  1. Species diversity increases as we move away from the equator towards the poles.

  2. Stellar's sea cow and passenger pigeon got extinct due to over exploitation by man.

  3. Lantana and Eicchornia are invasive weed species in India.

  4. The historic 'Convention on Biological Diversity' was held in 1992.

  5. Among animals insects are the most species rich taxonomic group.

Show answer
Correct Option: A
Explanation:

Statement A is incorrect as species diversity decreases and not increases as we move away from the equator towards the poles temperature decreases and conditions becomes harsh, vegetation decreases and less resources available to support species. 

Statement B is correct as Stellar's sea cow and passenger pigeon had extinct which is because of over exploitation by man. 
Statement C is correct as Lantana and Eicchornia are invasive weed species in India. These weeds invades disturbed natural ecosystems and adversely affects biodiversity. The weed is distributed throughout India.
Statement D is correct as the historic 'Convention on Biological Diversity' was held in 1992, Biodiversity Convention which is a multilateral treaty. 
Statement E is correct as among animals insects are the most species rich taxonomic group, they are most abundant species among animals.
Therefore, the correct answer is option A.

"Human Genetic Diversity: Lewontin's Fallacy" is a 2003 paper by

zoology biodiversity, classification and conservation levels of biodiversity environmental conservation and biodiversity biodiversity on earth and in india

  1. Malthus

  2. Edward

  3. Lamarck

  4. Darwin

Show answer
Correct Option: B
Explanation:

"Human Genetic Diversity: Lewontin's Fallacy" is a 2003 paper by A. W. F. Edwards. He criticises an argument first made by Richard Lewontin in his 1972 article "The Apportionment of Human Diversity", which argued that division of humanity into races is taxonomically invalid. Edward's critique is discussed in a number of academic and popular science books, with varying degrees of support. 

Therefore, the correct answer is option B.

The interbreeding individuals of a species showing continuous distribution are

zoology biodiversity, classification and conservation levels of biodiversity environmental conservation and biodiversity biodiversity on earth and in india

  1. Endemic

  2. Deme

  3. Cline

  4. Ecotones

Show answer
Correct Option: B
Explanation:

In biology, a deme is a term for a local population of organisms of one species, that actively interbreed with one another and share a distinct gene pool. When demes are isolated for a very long time they can become distinct subspecies or species. The term 'deme' is mainly used in evolutionary biology and is often used as a synonym for population. In evolutionary computation a "deme" often refers to any isolated subpopulation subjected to selection as a unit rather than as individuals. 

The diversity of an ecosystem of total geographical area is called 

zoology biodiversity, classification and conservation levels of biodiversity environmental conservation and biodiversity biodiversity on earth and in india

  1. Ecological integrity

  2. $\alpha$-diversity

  3. $\beta$- diversity

  4. $\gamma$- diversity

Show answer
Correct Option: D
Explanation:

Alpha diversity : species diversity within a community or habitat, comprises two components, i.e., species richness and evenness. Sometimes dominant of one vegetation stratum may affect the diversity of the other strata. 

Beta diversity : diversity is the inter community diversity expressing the rate of species turnover per unit change in habitat. 
Gamma diversity : gamma diversity is the overall diversity at landscape level includes both and  diversities. 

Number of plant species reported in India are

zoology biodiversity, classification and conservation levels of biodiversity environmental conservation and biodiversity biodiversity on earth and in india

  1. 45,000

  2. 410

  3. 1,250

  4. 4,780

Show answer
Correct Option: A
Explanation:

The flora of India is one of the richest of the world due to a wide range of climate, topology and environments in the country. It is thought there are over 17,500 species of flowering plants in India. India covers more than 45,000 species of flora, out of which there are several species that are not found anywhere else. Since ancient times, use of plants as a source of medicines has been the inherent part of life in India. There are more than 3000 officially documented plants in India that holds great medicinal potential. India comprises seven percent of world's flora.

Cheetah populations in Africa have been increasing for the past several decades from numbers in the hundreds to numbers in the thousands.
A study was conducted in which skin tissue samples were obtained from five wild cheetahs and grafted onto five other cheetahs. An immune response regarding non-self tissue rejection was absent in the cheetahs that received the skin grafts.
Recently, a small wild population of cheetahs has become infected with a new type of infectious cancer. Scientists are concerned about the extinction of the entire species because

zoology biodiversity, classification and conservation levels of biodiversity environmental conservation and biodiversity biodiversity on earth and in india

  1. Wild cheetah populations have lost their genetic diversity and are now equally susceptible to diseases.

  2. The immune systems of the wild cheetahs have become suppressed by stressors in their environments.

  3. Wild cheetah populations are still so small that transmission of infectious diseases will occur rapidly.

  4. Skin cancer tends to metastasize faster and be more malignant than many other forms of cancer.

Show answer
Correct Option: C
Explanation:

In case the species population were large, it would not face extinction in case of the rapid spread of the infectious disease, until the remedies are put in place by the scientist  to control the disease. Small population and rapid spread are the major concerns with respect to the extinction of the species

So, the correct answer is 'Wild cheetah populations are still so small that transmission of infectious diseases will occur rapidly'

Greatest genetic diversity of plants is found in

zoology biodiversity, classification and conservation levels of biodiversity environmental conservation and biodiversity biodiversity on earth and in india

  1. Central America

  2. Homelands

  3. South America

  4. India

Show answer
Correct Option: B
Explanation:

Sexual reproduction is critical for maintaining genetic diversity within a species because it combines the parents genetic material, resulting in offspring with unique genetic blueprints different from either parent. Genetic diversity is important for two reasons. First of all, when a population of an organism contains a large gene poolthat is, if the genetic blueprints of individuals in the population vary significantly the group has a greater chance of surviving and flourishing than a population with limited genetic variability. Second, genetic diversity also reduces the incidence of unfavorable inherited traits. The home lands of our food crops are vital geographic regions where the greatest genetic diversity for each species can be found. Because in homelands there are more chances of sexual reproduction with in the species which is critical for maintaining genetic diversity. Thus, option B is correct. Greatest genetic diversity of plants is not found in Central America, India and South America. Thus, other options are wrong.

Study statements (a - d) and select the two correct statements. 
(a) A lion eating a deer and a sparrow feeding on grain are consumers.

(b) Predator starfish and Pisaster help in maintaining species diversity of some invertebrates.
(c) Predators ultimately lead to the extinction of prey species.
(d) Plant chemicals like nicotine and strychnine are produced due to metabolic disorders. 

zoology biodiversity, classification and conservation levels of biodiversity environmental conservation and biodiversity biodiversity on earth and in india

  1. c and d

  2. a and d

  3. a and b

  4. b and c

Show answer
Correct Option: C

The species diversity of plants on Earth will be

zoology biodiversity, classification and conservation levels of biodiversity environmental conservation and biodiversity biodiversity on earth and in india

  1. 2.4%

  2. 22%

  3. 8.1%

  4. 85%

  5. 70%

Show answer
Correct Option: B
Explanation:

Species diversity is the number of different species, that are represented in a given community. 

Species diversity consists of two components: species richness and species evenness. Species richness is a simple count of species, whereas species evenness quantifies how equal the abundances of the species are. More than 70% of species recorded are animals and 22% are plant species.