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Recent questions tagged ch14
ASK
“The energy flow in an ecosystem follows the second law of thermodynamics”. Explain.
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-e
ecosystem
asked
Jul 11
by
pady_1
1
answer
Which of the following ecosystems will be more productive in terms of primary productivity? Justify
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-e
ecosystem
asked
Jul 11
by
pady_1
1
answer
Justify the following statements in terms of ecosystem dynamics. “Nature tends to increase the gro
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-e
ecosystem
asked
Jul 11
by
pady_1
1
answer
The rate of decomposition of detritus is affected by the abiotic factors like availability of oxygen
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-c
ecosystem
asked
Jul 11
by
pady_1
1
answer
What are the three types of ecological pyramids. What information is conveyed by each pyramid with r
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-e
ecosystem
asked
Jul 11
by
pady_1
1
answer
<div>What will happen to an ecosystem if:</div><div><br></div><div>a. All producers are removed.</di
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-c
ecosystem
asked
Jul 11
by
pady_1
1
answer
A farmer harvests his crop and expresses his harvest in three different ways.<br><br><div>a. I have
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-c
ecosystem
asked
Jul 11
by
pady_1
1
answer
What are the shortcomings of ecological pyramids in the study of the ecosystem?
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-c
ecosystem
asked
Jul 11
by
pady_1
1
answer
Apart from plants and animals, microbes form a permanent biotic component of an ecosystem. While pla
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-c
ecosystem
asked
Jul 11
by
pady_1
1
answer
Flow of energy through various trophic levels in an ecosystem is uni directional and non cyclic. Exp
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-c
ecosystem
asked
Jul 11
by
pady_1
1
answer
Is aquarium a complete ecosystem?
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-c
ecosystem
asked
Jul 11
by
pady_1
1
answer
Organisms at higher trophic level have less energy available. Comment.
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-c
ecosystem
asked
Jul 11
by
pady_1
1
answer
Primary productivity varies from ecosystem to ecosystem. Explain.
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-b
ecosystem
asked
Jul 11
by
pady_1
1
answer
Poaching of tiger is a burning issue in today's world. What implication would this activity have on
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-b
ecosystem
asked
Jul 11
by
pady_1
1
answer
Human activities interfere with carbon cycle. List any two such activities.
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-b
ecosystem
asked
Jul 11
by
pady_1
1
answer
What would be the reason for the faster rate of decomposition in the tropics?
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-b
ecosystem
asked
Jul 11
by
pady_1
1
answer
Climax stage is achieved quickly in secondary succession as compared to primary succession. Why?
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-b
ecosystem
asked
Jul 11
by
pady_1
1
answer
Arrange the following as observed in vertical stratification of a forest : Grass, Shrubby plants, te
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-b
ecosystem
asked
Jul 11
by
pady_1
1
answer
What is common to earthworm, mushroom, soil mites and dung beetle in an ecosystem?
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11
by
pady_1
1
answer
Define self sustainability.
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11
by
pady_1
1
answer
Give any two examples of xerarch succession.
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11
by
pady_1
1
answer
Why the rate of assimilation of energy at the herbivore level is called secondary productivity? 
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11
by
pady_1
1
answer
Why are oceans least productive?
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11
by
pady_1
1
answer
Is the common edible mushroom an autotroph or a heterotroph?
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11
by
pady_1
1
answer
What is the ultimate source of energy for the ecosystem?
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11
by
pady_1
1
answer
Among bryophytes, lichens and ferns which one is a pioneer species in a xeric succession?
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11
by
pady_1
1
answer
Name any two organisms which can occupy more than one tropic level in an ecosystem.
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11
by
pady_1
1
answer
Justify the pitcher plant as a producer.
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11
by
pady_1
1
answer
Name an omnivore which occurs in both grazing food chain and the decomposer food chain.
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11
by
pady_1
1
answer
Under what conditions would a articular stage in the process of succession revert back to an earlier
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11
by
pady_1
1
answer
What does the base tier of the ecological pyramid represent?
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11
by
pady_1
1
answer
Name an organism found as secondary carnivore in an aquatic ecosystem.
cbse
class12
ch14
exemplar
theoryquestion
biology
sec-a
ecosystem
asked
Jul 11
by
pady_1
1
answer
Write the statement "It is necessary to have a password to log on to the server." in the form if $p$ then $q$.
cbse
class11
ch14
mathematical-reasoning
bookproblem
exercise-misc14
sec-a
easy
q3-1
asked
Aug 16, 2014
by
rvidyagovindarajan_1
1
answer
Write the converse and contra positive of the statement "If it is hot outside then you feel thirsty."
cbse
class11
ch14
mathematical-reasoning
bookproblem
exercise-misc14
sec-b
easy
q2-3
asked
Aug 16, 2014
by
rvidyagovindarajan_1
1
answer
Write the converse and contra positive of the statement "I go to the beach whenever it is sunny day."
cbse
class11
ch14
mathematical-reasoning
bookproblem
exercise-misc14
sec-b
easy
q2-2
asked
Aug 16, 2014
by
rvidyagovindarajan_1
1
answer
Write the converse and contra positive of the statement "A positive integer is prime only if it has no divisors other than 1 and itself."
cbse
class11
ch14
mathematical-reasoning
bookproblem
exercise-misc14
sec-b
easy
q2-1
asked
Aug 14, 2014
by
rvidyagovindarajan_1
1
answer
Write the negation of the statement " There exists a number $x$ such that 0<$x$<1."
cbse
class11
ch14
mathematical-reasoning
bookproblem
exercise-misc14
sec-a
easy
q1-4
asked
Aug 4, 2014
by
rvidyagovindarajan_1
1
answer
Write the negation of the statement " For every real number $x$, either $x$ is >1 or <1."
cbse
class11
ch14
mathematical-reasoning
bookproblem
exercise-misc14
sec-a
easy
q1-3
asked
Aug 4, 2014
by
rvidyagovindarajan_1
1
answer
Write the negation of "All cats scratch."
cbse
class11
ch14
mathematical-reasoning
bookproblem
exercise-misc14
sec-a
easy
q1-2
asked
Aug 4, 2014
by
rvidyagovindarajan_1
1
answer
Write the negation of "For every positive real number $x$, the number $x+1$ is also positive."
cbse
class11
ch14
mathematical-reasoning
bookproblem
exercise-misc14
sec-a
easy
q1-1
asked
Aug 4, 2014
by
rvidyagovindarajan_1
1
answer
Write the negation of "For every positive real number $x$, the num ber $x+1$ is also positive."
cbse
class11
ch14
mathematical-reasoning
bookproblem
exercise-misc14
sec-a
easy
q1-1
asked
Aug 4, 2014
by
rvidyagovindarajan_1
0
answers
State whether the statement "$\sqrt {11}$ is a rational number." is true or false. Give reason.
cbse
class11
ch14
mathematical-reasoning
bookproblem
exercise14-5
sec-a
easy
q5-5
asked
Jul 29, 2014
by
rvidyagovindarajan_1
1
answer
State whether the statement "If $x,\:y$ are integers such that $x>y$, then $-x<-y$" is true or false. Give reason.
cbse
class11
ch14
mathematical-reasoning
bookproblem
exercise14-5
sec-a
easy
q5-4
asked
Jul 29, 2014
by
rvidyagovindarajan_1
1
answer
State whether the statement "Circle is a particular case of an ellipse." is true or false. Give reason.
cbse
class11
ch14
mathematical-reasoning
bookproblem
exercise14-5
sec-a
easy
q5-3
asked
Jul 29, 2014
by
rvidyagovindarajan_1
1
answer
State whether the statement "The centre of a circle bisects each chord of the circle." is true or false. Give reason.
cbse
class11
ch14
mathematical-reasoning
bookproblem
exercise14-5
sec-a
easy
q5-2
asked
Jul 29, 2014
by
rvidyagovindarajan_1
1
answer
State whether the statement "Each radius of a circle is a chord of the circle." is true or false. Give reason.
cbse
class11
ch14
mathematical-reasoning
bookproblem
exercise14-5
sec-a
easy
q5-1
asked
Jul 29, 2014
by
rvidyagovindarajan_1
1
answer
By giving counter example show that the statement "The equation $x^2-1=0$ does not have a root lying between $0$ and $2$." is false.
cbse
class11
ch14
mathematical-reasoning
bookproblem
exercise14-5
sec-b
easy
q4-2
asked
Jul 29, 2014
by
rvidyagovindarajan_1
1
answer
By giving counter example show that the statement "If all the angles of a triangle are equal then the triangle is an obtuse angled triangle" is not true.
cbse
class11
ch14
mathematical-reasoning
bookproblem
exercise14-5
sec-b
easy
q4-1
asked
Jul 29, 2014
by
rvidyagovindarajan_1
1
answer
Show that the statement "If $x$ is an integer and $x^2$ is even, then $x$ is also even." using contrapositive method.
cbse
class11
ch14
mathematical-reasoning
bookproblem
exercise14-5
sec-b
easy
q3
asked
Jul 26, 2014
by
rvidyagovindarajan_1
1
answer
Show that the statement "For any real numbers $a$ and $b$, $a^2=b^2$ implies that $a=b$" is not true by giving counter example.
cbse
class11
ch14
mathematical-reasoning
bookproblem
exercise14-5
sec-a
easy
q2
asked
Jul 26, 2014
by
rvidyagovindarajan_1
1
answer
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