Organisms and Populations
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Organisms and Populations
82 questions · Biology · NEET
- Epiphytes that are growing on a mango branch is an example of which of the following?2025 · Q20 · MCQ
- Which one of the following equations represents the Verhulst-Pearl Logistic Growth of population?2025 · Q88 · MCQ
- The equation of Verhulst-Pearl logistic growth is . From this equation, indicates:2024 · Q14 · MCQ
- Which one of the following factors will not affect the Hardy-Weinberg equilibrium?2024 · Q59 · MCQ
- Given below are two statements: Statement I: Gause's competitive exclusion principle states that two closely related species competing for different resources cannot exist indefinitely. Statement II: According to Gause's principle, during…2024 · Q86 · MCQ
- When will the population density increase, under special conditions? When the number of :2024 · Q47 · MCQ
- Match List-I with List-II: Chose the correct answer from the options given below: Includes table2024 · Q51 · MCQ
- Match List-I with List-II. Choose the correct answer from the options given below: Includes table2024 · Q67 · MCQ
- What do 'a' and 'b' represent in the following population growth curve? Includes diagram2024 · Q96 · MCQ
- Plants offer rewards to animals in the form of pollen and nectar and the animals facilitate the pollination process. This is an example of :2023 · Q18 · MCQ
- If there are 250 snails in a pond, and within a year their number increases to 2500 by reproduction. What should be their birth rate per snail per year ?2023 · Q66 · MCQ
- Given below are two statements: Statement I : Gause’s ‘Competitive Exclusion Principle’ states that two closely related species competing for the same resources cannot co-exist indefinitely and competitively inferior one will be eliminated…2023 · Q33 · MCQ
- Match List I with List II. Choose the correct answer from the options given below. Includes table2023 · Q72 · MCQ
- Match List I with List II. Choose the correct answer from the options given below: Includes table2023 · Q79 · MCQ
- Which one of the following statements cannot be connected to Predation?2022 · Q22 · MCQ
- While explaining interspecific interaction of population, (+) sign is assigned for beneficial interaction, () sign is assigned for detrimental interaction and (0) for neutral interaction. Which of the following interactions can be…2022 · Q33 · MCQ
- If '8' Drosophila in a laboratory population of '80' died during a week, the death rate in the population is ___________ individuals per Drosophila per week.2022 · Q67 · MCQ
- Amensalism can be represented as :2021 · Q28 · MCQ
- In the exponential growth equation Nt = N0ert, e represents2021 · Q33 · MCQ
- Inspite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival?2021 · Q8 · MCQ
- The process of growth is maximum during2020 · Q67 · MCQ
- Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their2020 · Q68 · MCQ
- Which of the following is not an attribute of a population?2020 · Q69 · MCQ
- The Earth summit held in Rio de Janeiro in 1992 was called :2019 · Q52 · MCQ
- Match Column-I with Column –II. Choose the correct answer from the options given below : Includes table2019 · Q53 · MCQ
- Which one of the following population interactions is widely used in medical science for the production of antibiotics?2018 · Q47 · MCQ
- Pneumatophores occur in2018 · Q49 · MCQ
- Niche is2018 · Q51 · MCQ
- Natality refers to2018 · Q54 · MCQ
- Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?2018 · Q55 · MCQ
- In a growing population of a country,2018 · Q58 · MCQ
- Presence of plants arranged into well defined vertical layers depending on their height can be seen best in :2017 · Q47 · MCQ
- Plants which produce characteristic pneumatophores and show vivipary belong to :2017 · Q48 · MCQ
- Asymptote in a logistic growth curve is obtained when :2017 · Q49 · MCQ
- Mycorrhizae are the example of :2017 · Q50 · MCQ
- Gause's principle of competitive exclusion states that -2016 · Q49 · MCQ
- It is much easier for a small animals to run uphill than for a large animal, because -2016 · Q50 · MCQ
- When does the growth rate of a population following the logistic model equal zero? The logistic model is given as dN/dt = rN(1-N/K)2016 · Q51 · MCQ
- If '+' sign is assigned to beneficial interaction, '–' sign to detrimental and '0' sign to neutral interaction, then the population interaction represented by '+' '–' refers to2016 · Q45 · MCQ
- Which of the following is correct for r-selected species ?2016 · Q46 · MCQ
- The principle of competitive exclusion was stated by2016 · Q47 · MCQ
- An association of individuals of different species living in the same habitat and having functional interactions is -2015 · Q36 · MCQ
- In which of the following interactions both partners are adversely affected?2015 · Q37 · MCQ
- The following graph depicts changes in two populations (A and B) of herbivores in a grassy field. A possible reason for these changes is that: Includes diagram2015 · Q69 · MCQ
- Just as a person moving from Delhi to Shimla to escape the heat for the duration of hot summer, thousands of migratory birds from Siberia and other extremely cold northern regions move to:2014 · Q44 · MCQ
- The age pyramid with broad base indicates :2013 · Q78 · MCQ
- Which one of the following is not a parasitic adaptation ?2013 · Q79 · MCQ
- Benthic organisms are affected most by :2013 · Q80 · MCQ
- A biologist studied the population of rats in a barn, He found that the average natality was 250, average mortality 240, immigration 20 and emigration 30. The net increase in population is :2013 · Q52 · MCQ
- A sedentary sea anemone gets attached to the shell lining of hermit crab. The association is :2013 · Q81 · MCQ
- Besides paddy fields, cyanobacteria are also found inside vegetative part of :2013 · Q82 · MCQ
- Cuscuta is an example of :2012 · Q45 · MCQ
- The logistic population growth is expressed by the equation :2011 · Q44 · MCQ
- Which one of the following is categorised as a parasite in true sense ?2011 · Q53 · MCQ
- What type of human population is represented by the following age pyramid ? Includes diagram2011 · Q83 · MCQ
- Large Woody Vines are more commonly found in2011 · Q84 · MCQ
- Consider the following four conditions (a – d) and select the correct pair of them as adaptation to environment in desert lizards. The conditions : (a) burrowing in soil to escape high temperature (b) losing heat rapidly from the body…2011 · Q85 · MCQ
- Which one of the following is most appropriately defined ?2010 · Q25 · MCQ
- The figure given below is a diagrammatic representation of response of organisms to abiotic factors. What do a, b and c represent respectively – Includes diagram2010 · Q55 · MCQ
- Which one of the following is one of the characteristics of a biological community?2010 · Q56 · MCQ
- A country with a high rate of population growth took measures to reduce it. The figure below shows age-sex pyramids of populations A and B twenty years apart. Select the correct interpretation about them : – Includes diagram2009 · Q46 · MCQ
- Reduction in vascular tissue, mechanical tissue and cuticle is characteristic of :2009 · Q47 · MCQ
- Consider the following four statements (1-4) about certain desert animals such as kangaroo-rat. (i) They have dark colour and high rate of reproduction and excrete solid urine (ii) They do not drink water, breathe at a slow rate to…2008 · Q46 · MCQ
- Quercus species are the dominant component in:2008 · Q47 · MCQ
- Geometric representation of age structure is a characteristic of :-2007 · Q34 · MCQ
- 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 · Q35 · MCQ
- If the mean and the median pertaining to a certain character of a population are of the same value, the following is most likely to occur:-2007 · Q36 · MCQ
- A high density of elephant population in an area can result in :-2007 · Q37 · MCQ
- Niche overlap indicates-2006 · Q48 · MCQ
- More than 70% of world's fresh water is contained in –2005 · Q46 · MCQ
- At which latitude, heat gain through insolation approximately equals heat loss through terrestrial radiation -2005 · Q47 · MCQ
- Which one of the following pairs in mismatched ?2005 · Q48 · MCQ
- Animals have the innate ability to escape from predation. Examples for the same are given below. Select the incorrect example2005 · Q49 · MCQ
- Certain characteristic demographic features of developing countries are -2004 · Q44 · MCQ
- What is a keystone species ?2004 · Q45 · MCQ
- The maximum growth rate occurs in :-2004 · Q46 · MCQ
- In which of the following pairs is the specific characteristic of a soil not correctly matched ?2004 · Q47 · MCQ
- In which one of the following habitats does the diurnal temperature of soil surface vary most ?2004 · Q48 · MCQ
- Mycorrhiza is an example of :-2003 · Q52 · MCQ
- What is true for individuals of same species ?2002 · Q51 · MCQ
- Which type of association is found in between entomophilous flower and pollinating agent ?2002 · Q52 · MCQ
- Two different species can not live for long duration in the same niche or habitat. This law is : -2002 · Q53 · MCQ