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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
what is the limitation of detritus food chain?
Who is considered as father of environmental science?
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?
If we were to count the no. of insects feeding on a big tree,we would get an inverted pyramid.Why??
pyramid of energy is always uprightupwards.why?
what is the difference between a saprophyte and saprotroph?
What does this line means,"In an aquatic system, GFC is the major conduit for energy flow" ?
1)Difference between detritus food chain (DFC) and grazing food chain (GFC)?
2)Represent detritus food chain by ray diagram ?
carbon cycle diagram
why are algae a good source of food supplements
examples of gaseous and sedimentary cycles
Difference between standing crop and standing state
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.
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 sere
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?.
why measurement of biomass in terms of dry weight is more accurate?
what is the difference between regulators and conformers
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?
Explain the difference between seral stage and climax community during succession .
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?
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.
rnWhy are nutrient cycles in nature called biogeochemical cyles?rn
Why are nutrient cycles in nature called biogeochemical cyles?
meaning of detritus?
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?
Why Saprophytes are not included in pyramids?
plz help me...
the differences between grazing food chain and detritus food chain ?
A farmer harvests his crop and expresses his harvest in three different ways.a. I have harvested 10 quintals of wheat.b. I have harvested 10 quintals of wheat today in one acre of land.c. I have harvested 10 quintals of wheat in one acre of land, 6 months after sowing.Do the above statements mean one and the same thing. If your answer is yes, give reasons. And if your answer is ‘no’ explain the meaning of each expression.
A farmer harvests his crop and expresses his harvest in three different ways.
a. I have harvested 10 quintals of wheat.
b. I have harvested 10 quintals of wheat today in one acre of land.
c. I have harvested 10 quintals of wheat in one acre of land, 6 months after sowing.
Do the above statements mean one and the same thing. If your answer is yes, give reasons. And if your answer is ‘no’ explain the meaning of each expression.
difference between upright pyramid and inverted pyramid?
why is Concentration of toxins found to be more in the organisms occupying the highest trophic level in the food chain in a polluted water body? Explain with the help of a suitable example?
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 __________________.
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
what is the limitation of detritus food chain?
Who is considered as father of environmental science?
How would you explain the paradox that the pyramid of biomass in sea is inverted because biomass of fishes exceeds that of phytoplankton?
Ans net osmosis occur from B to A
Chamber B has higher solute potential
measurement of biomass in terms od dry weight is more accurate. why?
If we were to count the no. of insects feeding on a big tree,we would get an inverted pyramid.Why??
pyramid of energy is always uprightupwards.why?
(b) List two important defence mechanisms plants have developed against herbivory ?
what is the difference between a saprophyte and saprotroph?
What does this line means,"In an aquatic system, GFC is the major conduit for energy flow" ?
1)Difference between detritus food chain (DFC) and grazing food chain (GFC)?
2)Represent detritus food chain by ray diagram ?
1.Nitrogen cycle 2.Carbon cycle 3.Sulphur cycle 4.Phosphorus cycle
carbon cycle diagram
why are algae a good source of food supplements
examples of gaseous and sedimentary cycles
Difference between standing crop and standing state
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.
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 ?
a) Aututrophs b) Autoheterotrophs c) Organotrophs d) Heterotrophs
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
(1) Deep sea
(2) Freshly formed rain water pond
(3) Forest ecosystem
(4) More than one option is correct.
Answer is (4). How is it? What are the structural components?
what is meant by term ecological succession?? provide details regarding ecological succession on land and water.
what is sere
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:nitrogen
2:phosphorus
3:carbon
4:sunlight
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?.
why measurement of biomass in terms of dry weight is more accurate?
what is the difference between regulators and conformers
why is the pyramid of biomass of phytoplankton inverted ?
A) 0.03%
B) 3%
C) 10%
D) 33%
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?
Explain the difference between seral stage and climax community during succession .
suggest some investigatory projects of biology
The second trophic level in a lake is-
(a) Phytoplankton
(b) Zooplankton
(c) Benthos
(d) Fishes
a)Atomic b) molecular c) mixture d) Sub-cellular
A man who is eating curd/yoghurt can be placed in which trophic level and why?
Differences between Carbon and Phosphorous cycle ?
b)why are the pyramids referred to as upright or inverted? explain.
What is the difference between decomposers and detritivores?
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.
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?
rn
Why are nutrient cycles in nature called biogeochemical cyles?
rnmeaning of detritus?
Is the pyramid of numbers for forests inverted or upright? Explain.
Q.175. Study the given diagram of a food web of a given terrestrial ecosystem. The arrows represent energy flow and the letters represent different species
In the above, if species D is distasteful to predators, which species is most likely to benefit from being a mimic of species D ?
(1) Species B
(2) Species A
(3) Species D
(4) Species C
Can you give 2 differences between carbon phosphorous cycle?
What is meant by competitive release in an ecosystem?
A] CARNIVORES
B] PURE VEGETARIANS
C] VEGETARIANS ALONG WITYH USE OF MILK
D] VEGETARIANS ALONG WITH USE OF MILK AND EGGS
Why Saprophytes are not included in pyramids?
plz help me...
the differences between grazing food chain and detritus food chain ?
A farmer harvests his crop and expresses his harvest in three different ways.
a. I have harvested 10 quintals of wheat.
b. I have harvested 10 quintals of wheat today in one acre of land.
c. I have harvested 10 quintals of wheat in one acre of land, 6 months after sowing.
Do the above statements mean one and the same thing. If your answer is yes, give reasons. And if your answer is ‘no’ explain the meaning of each expression.
difference between upright pyramid and inverted pyramid?
why is Concentration of toxins found to be more in the organisms occupying the highest trophic level in the food chain in a polluted water body? Explain with the help of a suitable example?
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 __________________.
a.rooted floating leaves
b.submerged
c.emerged
d.free floating
Secondary producers are
(a) Herbivores
(b) Producers
(c) Carnivores
(d) None of the above
Q.175. Study the given diagram of a food web of a given terrestrial ecosystem. The arrows represent energy flow and the letters represent different species.
In the above, if species D is distasteful to predators, which species is most likely to benefit from being a mimic of species D ?
(1) Species B
(2) Species A
(2) Species D
(4) Species C
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 ?
Which one of the following has the largest species variety in india
a) Wheat
b) Maize
c) Rice
d) Potato