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31 Years NEET Previous Year Questions: Organisms & Populations - 2


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25 Questions MCQ Test Biology 31 Years NEET Chapterwise Solved Papers | 31 Years NEET Previous Year Questions: Organisms & Populations - 2

31 Years NEET Previous Year Questions: Organisms & Populations - 2 for NEET 2022 is part of Biology 31 Years NEET Chapterwise Solved Papers preparation. The 31 Years NEET Previous Year Questions: Organisms & Populations - 2 questions and answers have been prepared according to the NEET exam syllabus.The 31 Years NEET Previous Year Questions: Organisms & Populations - 2 MCQs are made for NEET 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 below.
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31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 1

Cuscuta is an example of

[2012M]

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 1

Cuscuta, or Dodder plant, is a parasitic plant that wraps around other plants for nourishment. Cuscuta is found on outer side of the host and is total stem parasite. Cuscuta a parasite of Acacia.

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 2

Which one of the following statements is correct for secondary succession ?

[2011]

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 2

Secondary succession refers to the regrowth of a habitat in the area where disruptive event has occurred and eliminated the existing, above ground plant life of the natural habitat. So, it occurs on a deforested site.

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 3

Large woody vines are more commonly found in :

[2011]

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 3

Large woody vines are more commonly found in tropical rain forests. This is a common concern in the high humidity climatic condition.

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 4

In the case of peppered moth (Biston betularia) the black - coloured form became dominant over the light- coloured form in England during  industrial revolution.

[2009] 

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 4

‘A’ is more recent and shows slight reduction in growth rate.

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 5

What is true about the isolated small tribal populations?

[2008]

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 5

There is a decline in population as boys marry girls only from their own tribe in the isolated small tribal populations. 

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 6

A high density of elephant population in an area can result in

[2007]

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 6

It is competition between individuals of same species. The intraspecific competition may be very severe because all the members of a species have similar requirements of food, habitat mate, etc and they also have similar adaptations to get their needs.

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 7

Two plants can be conclusively said to belong to the same species if they

[2007]

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 7

When the members of a species are inter - fertile and produce fertile offsprings.

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 8

The population of an insect species shows an explosive increase in numbers during rainy season followed by its disappearance at the end of the season. What does this show?  

[2007]

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 8

If a population (e.g reindeer population) is allowed to grow in a predator free environment, the population grows beyond carrying capacity and there occurs population crash due to sudden shortage of food. Such growth curves also occur in insect populations during rainy season, and in algal blooms.

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 9

Geometric representation of age structure is a characteristic of

[2007]

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 9

Geometric representation of age structure a characteristic of population.

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 10

Praying mantis is a good example of

[2006]

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 10

Praying mantis is a good example of camouflage. Camouflage is the natural colouring of an animal which enables it to blend in with its surroundings.
A praying mantis, or praying mantid, is the common name for an insect of the order Mantodea. Often mistakenly spelled preying mantis (a tempting mistake, as they are notoriously predatory) they are in fact named for the typical “prayer-like” stance. The word mantis derives from the Greek word mantis for prophet or fortune teller. A praying mantis from India

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 11

The formula for exponential population growth is

[2006]

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 11

The formula of exponential growth is  is the rate of change in population size, r is the biotic potential and N is the population size.

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 12

Niche overlap indicates

[2006]

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 12

Niche indicate the habitat of a particular species and the interaction of that species with the resources present in the habitat. Niche overlap means that two or more species sharing the resources present in a particular niche.

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 13

Certain characteristic demographic features of developing countries are

[2004]

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 13

Demography is the study of population in all aspects. Fertility refers to the number of children per couple. Mortality rate is the average number of natural deaths per unit  population per unit time. Age distribution refers to the proportionate occurrence of individuals of the three age groups. Developing countries usually  have high rate of population growth, because of increasing fertility and declining mortality.

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 14

The maximum growth rate occurs in

[2004]

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 14

In the sigmoid growth cur ve growth is slow in the lag phase. Growth rate remains stable during the stationary phase and it declines during the senescent phase. Growth increases logarithmically during the exponential phase.

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 15

In which one of the following habitats does the diurnal temperature of soil surface vary most?

[2004]

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 15

Desert show maximum difference between day and night temperature.

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 16

What is a keystone species ?

[2004]

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 16

A keystone species is the one which makes up only a small proportion of the total biomass of a community, yet has a huge impact on the community’s organization and survival.

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 17

Diffuse porous woods are characteristic of plants  growing in

[2003]

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 17

Diffused porous wood have vessels irregularly arranged within the wood. In tropics, there is no sharp distinction between the seasons; hence, there is not much difference in the activity of cambium.

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 18

The semilog of per minute growing bacteria is plotted against time. What will be the shape of graph?

[2002]

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 18

Semilog of per minute growing bacterium when plotted against time, would yield ascending straight line.

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 19

Choose the correct sequence of stages of growth curve for bacteria

[2002]

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 19

The growth curve for bacteria is sigmoid. First phase is the phase of slow growth- Lag phase. Second phase is the period of accelerated growth - Log phase. Third phase is the phase when growth rate  becomes stable - Stationary phase. Finally growth rate declines.

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 20

In a population unrestricted reproductive capacity is called as

[2002]

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 20

The biotic potential is defined as the physiological capacity of organisms to produce their offspring under natural conditions. It is also called reproductive potential. In nature, the biotic potential of organisms is enormous but all the organisms do not survive due to the lack of food and space. There are also a number of diseases and predatory organisms, that feed upon other organisms. The carrying capacity is the maximum number of individuals which the environment can support or sustain.

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 21

Which part of the world has a high density of organisms? [1999]

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 21

Tropical rain forests occur in equatorial and subequatorial regions. The forests receive all the external inputs for optimum plant growth.  Due to abundant plant growth, a large number of animals live in tropical rain forests. In grasslands fire occur periodically which prevent tree growth. In savannahs periods of drought are common. In deciduous forests are found predominantly broad leaved hard wood deciduous trees.

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 22

Which of the following communities is more vulnerable to invasion by outside animals and plants ?  [1998]

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 22

Tropical forests are found in tropical zone of the world and are characterised by very high temperature with rainfall in abundance. The flora of tropical rain forest is very rich and highly diversified. The tropical forests have a very rich fauna both in density as well as in varieties. The reason for this high diversity and variety of flora and fauna is the occurence of suitable conditions in these forests. So these are more vulnerable to invasion by outside plants and animals.

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 23

Two opposite forces operate in the growth and development of every population. One of them relates to the ability to reproduce at a given rate. The force opposing to it is called

[1998]

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 23

Mortality is the average number of natural deaths per unit population per unit time. Fecundity refers to the biotic potential of the organism. Environmental resistance is the sum total of all limiting factors that prevents a population to realize its full potential.

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 24

An interesting modification of flower shape for insect pollination occurs in some orchids in which a male insect mistakes the pattern on the orchid flower for the female species and tries to copulate with it, thereby pollinating the flower. This phenomenon is called:   

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 24

For its pollination the orchid Ophrys speculum has picked on the most selective attraction in the entire animal kingdom. It is pollinated by a hairy wasp, Colpa aurea. The wasp has a fixed habit whereby its males leave the burrows for above-ground existence about four weeks before the females emerge for the open-air mating. The orchid opens its flowers about the same time the males appear and they possess an appearance and odour similar to those possessed by the female wasps. The inexperienced males mistake the Ophrys flowers for their female counterparts and land to perform the act of pseudo-copulation. The insect repeats the act with a number of orchid flowers and carries pollinia from one flower to another. This insect-plant relationship is beneficial only to the plant.

31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 25

Two opposite forces operate in the growth and development of every population. One of them relates to the ability to reproduce at a given rate. The force opposing it is called 

Detailed Solution for 31 Years NEET Previous Year Questions: Organisms & Populations - 2 - Question 25

Biotic potential is the inherent ability of an organism to reproduce.  Resistance refers to the sum total of all the limiting factors that inhibit further growth of population.

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