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Published on: 25/05/2021
CBSE 12th Standard Biology Subject Organisms and Populations Ncert Exemplar MCQ QuestioQB365 Provides the updated NCERT Examplar Questions for Class 12 Biology, and also provide the detail solution for each and every ncert examplar questions , QB365 will give all kind of study materials will help to get more marksns With Solution 2021
Download CBSE Class 12th Standard CBSE Biology question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 12th Standard CBSE Biology
Questions + Answers key
Take MCQ Biology Test1.
Which one of the following organisms reproduces sexually only once in its life time?
Banana plant
Mango
Tomato
Eucalyptus
2.
Which of the following is a partial root parasite?
Sandal wood
Mistletoe
Orobanche
Ganoderma
3.
Lichens are the associations of :
bacteria and fungus
algae and bacterium
fungus and algae
fungus and virus
4.
Amensalism is an association between two species where:
one species is harmed and other is benefitted
one species is harmed and other is unaffected
one species is benefitted and other is unaffected
both the species are harmed
5.
A protozoan reproduces by binary fission. What will be the number of protozoans in its population after six generations?
128
24
64
32
6.
Which of the following would necessarily decrease the density of a population in a given habitat?
Natality > mortality
Immigration > emigration
Mortality and emigration
Natality and immigration
7.
A population has more young individuals compared to the older individuals. What would be the status of the population after some years?
It will decline
It will stabilise
It will increase
It will first decline and then stabilise
8.
What would be the per cent growth or birth rate pe individual per hour for the same population mentioned in the question (Question 10 at Page 95)?
100
200
50
150
9.
If in a population, natality is balanced by mortality then there will be
decrease in population grwoth
zero population growth
increase in population growth
over population
10.
An association between two individuals or populations where both are benefitted and where neither can survive without the other is
commensalism
amensalism
protocooperation
mutualism
1.
(d)
Eucalyptus
2.
(a)
Sandal wood
3.
(c)
fungus and algae
4.
(c)
one species is benefitted and other is unaffected
5.
(c)
64
6.
(c)
Mortality and emigration
7.
(c)
It will increase
8.
(b)
200
9.
(b)
zero population growth
10.
(d)
mutualism
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