Q.1
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) :- …[AIPMT-2016]
  • a) when N/K is exactly one.
  • b) when N nears the carrying capacity of the habitat.
  • c) when N/K equals zero.
  • d) when death rate is greater than birth rate.
Q.2
It is much easier for a small animal to run uphill than for a large animal, because :- …[AIPMT-2016]
  • a) It is easier to carry a small body weight.
  • b) Smaller animals have a higher metabolic rate.
  • c) Small animals have a lower O2 requirement.
  • d) The efficiency of muscles in large animals is less than in the small animals.
Q.3
Which of the following statements is not correct ? …[AIPMT-2016]
  • a) Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style.
  • b) Insects that consume pollen or nectar without bringing about pollination are called pollen/nectar robbers.
  • c) Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil.
  • d) Some reptiles have also been reported as pollinators in some plant species.
Q.4
A biologist studied the population of rats in a barn. He found that the average natality was 250, average mortality 240, immigration 20 and emigrationThe net increase in population is …[NEET 2013]
  • a) 10
  • b) 15
  • c) 05
  • d) Zero
Q.5
A sedentary sea anemone gets attached to the shell lining of hermit crab. The association is …[NEET 2013]
  • a) Ectoparasitism
  • b) Symbiosis
  • c) Commensalism
  • d) Amensalism
Q.6
Which of the following is correct for r-selected species ?
  • a) Small number of progeny with small size
  • b) Small number of progeny with large size
  • c) Large number of progeny with small size
  • d) Large number of progeny with large size
Q.7
If '+' sign is assigned to beneficial interaction '–' sign to detrimental and '0' sign to neutral interaction, then the population interaction represented by '+' '–' refers to : …[NEET 2016]
  • a) Commensalism
  • b) Parasitism
  • c) Mutualism
  • d) Amensalism
Q.8
Mycorrhiza are the example of ….[NEET- 2017]B34
  • a) Fungistasis
  • b) Amensalism
  • c) Antibiosis
  • d) Mutualism
Q.9
Plants which produce characteristic pneumatophores and show vivipary belong to ….[NEET- 2017]
  • a) Mesophytes
  • b) Halophytes
  • c) Psammophytes
  • d) Hydrophytes
Q.10
Asymptote in a logistic growth curve is obtained when ….[NEET- 2017]
  • a) The value of 'r' approaches zero
  • b) K = N
  • c) K > N
  • d) K < N
Q.11
In which of the following interactions both partners are adversely affected ? [ ReAIPMT 2015]
  • a) Mutualism
  • b) Competition
  • c) Predation
  • d) Parasitism
Q.12
Metagenesis refers to : [ ReAIPMT 2015]
  • a) Presence of a segmented body and parthenogenetic mode of reproduction
  • b) Presence of different morphic forms
  • c) Alternation of generation between asexual and sexual phases of an organism
  • d) Occurrence of a drastic change in form during post-embryonic development
Q.13
Niche is ... [NEET 2018]
  • a) all the biological factors in the organism environment
  • b) the physical space where an organism live
  • c) the range of temperature that the organism needs to live
  • d) the functional role played by the organism where it lives
Q.14
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? [NEET 2018]
  • a) Hydrilla
  • b) Yucca
  • c) Banana
  • d) Viola
Q.15
n a growing population of a country ... ... [ NEET 2018]
  • a) pre-reproductive individuals are more than the reproductive individuals.
  • b) reproductive individuals are less than the post reproductive individuals.
  • c) reproductive and pre-reproductive individuals are equal in number.
  • d) pre-reproductive individuals are less than the reproductive individuals.
Q.16
Which one of the following population interactions is widely used in medical science for the production of antibiotics ? [NEET 2018]
  • a) Commensalism
  • b) Mutualism
  • c) Parasitism
  • d) Amensalism
0 h : 0 m : 1 s