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what is the reason for low productivity of oceans despite occupying 70 % of the surface?
i have to make biology investigatory project of class 12 cbse on topic ecosystem.i dont know how to make it .please give me a sample project and help me to do this
pls explain this....
ecosystems are not exempt from the second law of thermodynamics.they need a constant supply of energy to synthesise the molecules they require,to counteract the universal tendency towars increasing disorderliness.
what is the limitation of detritus food chain?
How would you explain the paradox that the pyramid of biomass in sea is inverted because biomass of fishes exceeds that of phytoplankton?
measurement of biomass in terms od dry weight is more accurate. why?
carbon cycle diagram
pyramid of energy is always uprightupwards.why?
what is the difference between a saprophyte and saprotroph?
Who is considered as father of environmental science?
1)Difference between detritus food chain (DFC) and grazing food chain (GFC)?
2)Represent detritus food chain by ray diagram ?
plz help me...
the differences between grazing food chain and detritus food chain ?
What does this line means,"In an aquatic system, GFC is the major conduit for energy flow" ?
what is d difference between fragmentation and catabolism?????????
examples of gaseous and sedimentary cycles
Difference between standing crop and standing state
collection of medicinal plants and its uses . how to prepare medicine using those med. plants??
plz help me on this . give the names of @least 13 common medicinal plants ?
who perfomed the blender experiment in regard to certain nature of dna? what was the objective of this experiment ? pls explain the procedure in details
what is meant by term ecological succession?? provide details regarding ecological succession on land and water.
what is meant by FADH2 and NADH2 in bioenegetics???what r its functions?
Define ecological pyramids and describe with examples, pyramids of number and biomass.
1. In an ecosystem dominated by trees, the pyramid (of numbers) is _________ type. How is it inverted ? Can't it be spindle shaped too?
2.Which one of the following has the largest population in a food chain? shouldnt it be producers as decomposers are not included in the food chain?.
what is the difference between regulators and conformers
why measurement of biomass in terms of dry weight is more accurate?
rnWhich of the following ecosystems will be more productive in terms of primary productivity? Justify your answer. A young forest, a natural old forest, a shallow polluted lake, alpine meadow.rn
Which of the following ecosystems will be more productive in terms of primary productivity? Justify your answer. A young forest, a natural old forest, a shallow polluted lake, alpine meadow.
the number of taxa exibiting asexualreproduction is drastically reduced inhigher plants (angiosperms) and higher animals (vertebrates) as comparedwith lower groups of plants and animals. analyse the possible reasons for this situation
why is the pyramid of biomass of phytoplankton inverted ?
DRAW THE PYRAMID OF BIOMASS IN A SEA AND IN A FOREST. EXPLAIN GIVING REASONS WHY THE TWO PYRAMID IS DIFFERENT?
when is the pyramid of biomass spindle shaped?
If we were to count the no. of insects feeding on a big tree,we would get an inverted pyramid.Why??
suggest some investigatory projects of biology
The second trophic level in a lake is-
(a) Phytoplankton
(b) Zooplankton
(c) Benthos
(d) Fishes
A man who is eating curd/yoghurt can be placed in which trophic level and why?
Differences between Carbon and Phosphorous cycle ?
What is the difference between decomposers and detritivores?
In a pond ecosystem you may find the plant with purple flowers that spread very
what is the function of reservoir in nutrient cycle?
why are algae a good source of food supplements
what are respiratory losses?
Is the pyramid of numbers for forests inverted or upright? Explain.
Can you give 2 differences between carbon phosphorous cycle?
What is meant by competitive release in an ecosystem?
State the difference between the first trophic level of detritus food chain and grazing food chain.
The first trophic level of detritus food chain is often the dead and decaying organic matter whereas the grazing food chain starts with the living green plants.
The first trophic level organisms of detritus food chain are saprophytes whereas the starters of grazing food chain are producers.
Is that second point actually right? How can the organic matter and saprophytes be the same?Aren't saprophytes the consumers of detritus?Correct me if i'm wrong.
Why Saprophytes are not included in pyramids?
difference between upright pyramid and inverted pyramid?
1) Vertical distribution of different species occupying different levels is called ___________.
2) Of the incident solar radiation (on earth) less than 50% of it is __________________.
meaning of detritus?
Secondary producers are
(a) Herbivores
(b) Producers
(c) Carnivores
(d) None of the above
what are plant hormones? give the uses of the plant hormones like auxins,gibberlins,cytokinins and artificial hormones like ABA,ethylene??
why does human body maintain constant temperature both in summerss and winters ?
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Syllabus
what is the reason for low productivity of oceans despite occupying 70 % of the surface?
i have to make biology investigatory project of class 12 cbse on topic ecosystem.i dont know how to make it .please give me a sample project and help me to do this
pls explain this....
ecosystems are not exempt from the second law of thermodynamics.they need a constant supply of energy to synthesise the molecules they require,to counteract the universal tendency towars increasing disorderliness.
what is the limitation of detritus food chain?
(1) High productivity
(2) High diversity
(3) Complex food chains
(4) More cycling of nutrients
Answer is (1). How?
How would you explain the paradox that the pyramid of biomass in sea is inverted because biomass of fishes exceeds that of phytoplankton?
measurement of biomass in terms od dry weight is more accurate. why?
carbon cycle diagram
pyramid of energy is always uprightupwards.why?
what is the difference between a saprophyte and saprotroph?
Who is considered as father of environmental science?
1)Difference between detritus food chain (DFC) and grazing food chain (GFC)?
2)Represent detritus food chain by ray diagram ?
plz help me...
the differences between grazing food chain and detritus food chain ?
What does this line means,"In an aquatic system, GFC is the major conduit for energy flow" ?
what is d difference between fragmentation and catabolism?????????
examples of gaseous and sedimentary cycles
A) 0.03%
B) 3%
C) 10%
D) 33%
Difference between standing crop and standing state
collection of medicinal plants and its uses . how to prepare medicine using those med. plants??
plz help me on this . give the names of @least 13 common medicinal plants ?
who perfomed the blender experiment in regard to certain nature of dna? what was the objective of this experiment ? pls explain the procedure in details
what is meant by term ecological succession?? provide details regarding ecological succession on land and water.
Could you be please explain this sentence???
what is meant by FADH2 and NADH2 in bioenegetics???what r its functions?
Define ecological pyramids and describe with examples, pyramids of number and biomass.
1. In an ecosystem dominated by trees, the pyramid (of numbers) is _________ type. How is it inverted ? Can't it be spindle shaped too?
2.Which one of the following has the largest population in a food chain? shouldnt it be producers as decomposers are not included in the food chain?.
what is the difference between regulators and conformers
why measurement of biomass in terms of dry weight is more accurate?
rn
Which of the following ecosystems will be more productive in terms of primary productivity? Justify your answer. A young forest, a natural old forest, a shallow polluted lake, alpine meadow.
rnthe number of taxa exibiting asexualreproduction is drastically reduced inhigher plants (angiosperms) and higher animals (vertebrates) as comparedwith lower groups of plants and animals. analyse the possible reasons for this situation
why is the pyramid of biomass of phytoplankton inverted ?
which of the following categories of bacteria play a great role in recycling nutrients
(a)photosynthetic autotrophs
(b)chemosynthetic autotrophs
(c)symbiotic bacteria
(d)parasitic bacteria
DRAW THE PYRAMID OF BIOMASS IN A SEA AND IN A FOREST. EXPLAIN GIVING REASONS WHY THE TWO PYRAMID IS DIFFERENT?
91. Diversification in plant life appeared
(A) Due to long period of evolutionary changes
(B) Due to abrupt mutations
(C) Suddenly on earth
(D) By seed dispersal.
94. Common indicator organism of water pollution is
(A) Lemna paucicostata
(B) Eichhornia crassipes
(C) Escherichia coli
(D) Entamoeba histolytica.
when is the pyramid of biomass spindle shaped?
If we were to count the no. of insects feeding on a big tree,we would get an inverted pyramid.Why??
suggest some investigatory projects of biology
The second trophic level in a lake is-
(a) Phytoplankton
(b) Zooplankton
(c) Benthos
(d) Fishes
A man who is eating curd/yoghurt can be placed in which trophic level and why?
Differences between Carbon and Phosphorous cycle ?
What is the difference between decomposers and detritivores?
b)why are the pyramids referred to as upright or inverted? explain.
In a pond ecosystem you may find the plant with purple flowers that spread very
1). first trophic level
2). second trophic level
3). third trophic level
4). fourth trophic level
its answer according to me should be fourth trophic level as first one are plants, second is cow, third should be bacteria which convert milk into curd fourth one should be the man eating the curd, but given answer is third trophic level. but how?
what is the function of reservoir in nutrient cycle?
why are algae a good source of food supplements
what are respiratory losses?
Is the pyramid of numbers for forests inverted or upright? Explain.
1.Nitrogen cycle 2.Carbon cycle 3.Sulphur cycle 4.Phosphorus cycle
Can you give 2 differences between carbon phosphorous cycle?
What is meant by competitive release in an ecosystem?
1)detritus food chain
2)saprophytic food chain
3)predator food chain
4)both 1 and 2
State the difference between the first trophic level of detritus food chain and grazing food chain.
The first trophic level of detritus food chain is often the dead and decaying organic matter whereas the grazing food chain starts with the living green plants.
The first trophic level organisms of detritus food chain are saprophytes whereas the starters of grazing food chain are producers.
Is that second point actually right? How can the organic matter and saprophytes be the same?Aren't saprophytes the consumers of detritus?
Correct me if i'm wrong.
Why Saprophytes are not included in pyramids?
difference between upright pyramid and inverted pyramid?
1) Vertical distribution of different species occupying different levels is called ___________.
2) Of the incident solar radiation (on earth) less than 50% of it is __________________.
meaning of detritus?
Secondary producers are
(a) Herbivores
(b) Producers
(c) Carnivores
(d) None of the above
what are plant hormones? give the uses of the plant hormones like auxins,gibberlins,cytokinins and artificial hormones like ABA,ethylene??
why does human body maintain constant temperature both in summerss and winters ?