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]
-
43%
a) when N/K is exactly one.
-
29%
b) when N nears the carrying capacity of the habitat.
-
14%
c) when N/K equals zero.
-
14%
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]
-
29%
a) It is easier to carry a small body weight.
-
29%
b) Smaller animals have a higher metabolic rate.
-
29%
c) Small animals have a lower O2 requirement.
-
14%
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]
-
33%
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.
-
0%
b) Insects that consume pollen or nectar without bringing about pollination are called pollen/nectar robbers.
-
33%
c) Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil.
-
33%
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]
-
33%
a) 10
-
17%
b) 15
-
17%
c) 05
-
33%
d) Zero
Q.5.
A sedentary sea anemone gets attached to the shell lining of hermit crab. The association is …[NEET 2013]
-
0%
a) Ectoparasitism
-
40%
b) Symbiosis
-
60%
c) Commensalism
-
0%
d) Amensalism
Q.6.
Which of the following is correct for r-selected species ?
-
20%
a) Small number of progeny with small size
-
20%
b) Small number of progeny with large size
-
0%
c) Large number of progeny with small size
-
60%
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]
-
33%
a) Commensalism
-
67%
b) Parasitism
-
0%
c) Mutualism
-
0%
d) Amensalism
Q.8.
Mycorrhiza are the example of ….[NEET- 2017]B34
-
0%
a) Fungistasis
-
50%
b) Amensalism
-
17%
c) Antibiosis
-
33%
d) Mutualism
Q.9.
Plants which produce characteristic pneumatophores and show vivipary belong to ….[NEET- 2017]
-
40%
a) Mesophytes
-
20%
b) Halophytes
-
40%
c) Psammophytes
-
0%
d) Hydrophytes
Q.10.
Asymptote in a logistic growth curve is obtained when ….[NEET- 2017]
-
0%
a) The value of 'r' approaches zero
-
75%
b) K = N
-
25%
c) K > N
-
0%
d) K < N
Explanation
Q.11.
In which of the following interactions both partners are adversely affected ? [ ReAIPMT 2015]
-
60%
a) Mutualism
-
40%
b) Competition
-
0%
c) Predation
-
0%
d) Parasitism
Q.12.
Metagenesis refers to : [ ReAIPMT 2015]
-
25%
a) Presence of a segmented body and parthenogenetic mode of reproduction
-
25%
b) Presence of different morphic forms
-
25%
c) Alternation of generation between asexual and sexual phases of an organism
-
25%
d) Occurrence of a drastic change in form during post-embryonic development
Q.13.
Niche is ... [NEET 2018]
-
0%
a) all the biological factors in the organism environment
-
25%
b) the physical space where an organism live
-
25%
c) the range of temperature that the organism needs to live
-
50%
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]
-
50%
a) Hydrilla
-
25%
b) Yucca
-
0%
c) Banana
-
25%
d) Viola
Q.15.
n a growing population of a country ... ... [ NEET 2018]
-
75%
a) pre-reproductive individuals are more than the reproductive individuals.
-
0%
b) reproductive individuals are less than the post reproductive individuals.
-
25%
c) reproductive and pre-reproductive individuals are equal in number.
-
0%
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]
-
0%
a) Commensalism
-
0%
b) Mutualism
-
67%
c) Parasitism
-
33%
d) Amensalism