Practice free Organism and Population (Botany) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Which of the following organisms exhibit a life history strategy of breeding multiple times during their lifetime?
According to the NCERT text: 'Some organisms breed only once in their lifetime (Pacific salmon fish, bamboo) while others breed many times during their lifetime (most birds and mammals).'
The evolution of 'life history traits' in different species is primarily influenced by:
The NCERT text states: 'Ecologists suggest that life history traits of organisms have evolved in relation to the constraints imposed by the abiotic and biotic components of the habitat in which they live.'
An organism that breeds once in its lifetime and produces a small number of large-sized offspring would be considered to have a life history strategy similar to which of the following?
The NCERT text mentions: 'Some produce a large number of small-sized offspring (Oysters, pelagic fishes) while others produce a small number of large-sized offspring (birds, mammals).' While Pacific salmon fish breed once, the question asks for characteristics of 'small number of large-sized offspring', which aligns with birds and mammals.
Which of the following represents a group of organisms that produce a small number of large-sized offspring?
The NCERT text states: 'Some produce a large number of small-sized offspring (Oysters, pelagic fishes) while others produce a small number of large-sized offspring (birds, mammals).'
The 'intrinsic rate of natural increase' (r) is a measure of:
The summary section of the NCERT chapter states: 'The intrinsic rate of natural increase (r) is a measure of the inherent potential of a population to grow.'
Why is the logistic growth model considered more realistic for most animal populations?
The NCERT text says: 'Since resources for growth for most animal populations are finite and become limiting sooner or later, the logistic growth model is considered a more realistic one.'
Which of the following is an attribute that populations possess but individual organisms do not?
The NCERT text clearly states: 'Populations have attributes that individual organisms do not- birth rates and death rates, sex ratio and age distribution.' While individuals experience births and deaths, the rates and ratios are population-level attributes.
Ecology is concerned with four levels of biological organisation. Which of the following is NOT one of these levels?
The NCERT states: 'Ecology is basically concerned with four levels of biological organisation – organisms, populations, communities and biomes.'
The shape of an age pyramid graphically represents the proportion of different age groups and sexes, and indicates whether a population is:
The NCERT summary states: 'The proportion of different age groups of males and females in a population is often presented graphically as age pyramid; its shape indicates whether a population is stationary, growing or declining.'
In a newly colonised habitat, which factor would likely contribute more significantly to population growth than birth rates?
The NCERT text notes: 'For instance, if a new habitat is just being colonised, immigration may contribute more significantly to population growth than birth rates.'
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