Phosphorus Cycle

Q.

The major reservoir for phosphorus is

1. cloud

2. soil and rocks

3. atmosphere

4. plants

Q.

A natural reservoir of phosphorus is

1. Rock

2. Animal bones

3. Fossils

4. Sea water

Q.

Which one of the following is the Sedimentary Cycle?

1. Carbon

2. Nitrogen

3. Hydrogen

4. Phosphorus

Q.

Antigens are present:

1. On the cell surface

2. Inside nucleus

3. Inside cytoplasm

4. On nuclear membrane

Q. Refer the given nutrient cycle in a terrestrial ecosystem. Identify A, B, C and D.

1. A – Consumers; B – Decomposition; C – Producers D – Weathering
2. A – Consumers; B – Weathering; C – Producers; D – Decomposition
3. A – Producers; B – Consumers; C – Decomposition; D – Weathering
4. A – Consumers; B – Producers; C – Decomposition; D – Weathering

Q.

Do rotifers cause disease?

Q. Among the biogeochemical cycles mentioned below, _________ are sedimentary and ________ are gaseous.
Carbon cycle, Nitrogen cycle, Phosphorus cycle, Sulphur cycle

1. 2, 2
2. 1, 3
3. 3, 1
4. 4, 0

Q. Phosphorus remain outside the natural cycle for a long time

1. Because bones and teeth take a long time to decompose
2. When the bodies of the organisms excrete and decompose
3. None of the above
4. Both a and b

Q. Which of the following represents sedimentary type of nutrient cycle?

1. Nitrogen
2. Carbon
3. Phosphorus
4. Oxygen

Q. Which one is a sedimentary cycle?

1. Oxygen cycle
2. Nitrogen cycle
3. Hydrogen cycle
4. Carbon cycle
5. Phosphorus cycle

Q.

What are the different types of biogeochemical cycles?

Q. Which one is the Sedimentary Cycle?

1. Oxygen Cycle
2. Nitrogen Cycle
3. Hydrogen Cycle
4. Phosphorus Cycle

Q. Natural reservoir of phosphorus is

1. Animal bones
2. Rock
3. Fossils
4. Sea water

Q. Which one of the following is sedimentary cycle?

1. Hydrogen
2. Nitrogen
3. Phosphorus
4. Carbon

Q. Write the importance of phosphorus in living organisms.

Q. Which of the following is not a gaseous type of biogeochemical cycle?

1. Nitrogen cycle
2. Phosphorus cycle
3. Oxygen cycle
4. Carbon cycle

Q. In the phosphorus cycle, phosphate becomes available by weathering of rocks first to _____________.

1. Consumers
2. Decomposers
3. Producers
4. None of these

Q.

rn

Why are nutrient cycles in nature called biogeochemical cyles?

rn

Q.

Identify the process depicted in the diagram given below.

1. Phosphorus cycling in a terrestrial ecosystem

2. Carbon cycle in the biosphere

3. Hydrological cycle

4. Nitrogen cycle

Q.

Identify the process depicted in the diagram given below.

Weathering Rock minerals

Q. Explain phosphorus cycle in nature.

Q. Which is not a gaseous biogeochemical cycle?

1. Carbon
2. Sulphur
3. Phosphorus
4. Nitrogen

Q. Some of the nutrient cycles are labeled as below.
Sulphur cycle (A), phosphorus cycle (B), carbon cycle (C), and nitrogen cycle (D). Of these, the sedimentary cycle is represented by:

1. (A) only
2. (B) only
3. (C) only
4. (A) and (B) only
5. (C) and (D) only

Q. The simplest of all nutrient cycles operating in an ecosystem is .......... cycle.

1. Carbon
2. Phosphorous
3. Nitrogen
4. Sulphur

Q. Describe the effects of edaphic factors on the living organisms

Q. Phosphorus cycle is

1. Perfect cycle
2. Gaseous cycle
3. Partly gaseous and partly sedimentary
4. Imperfect cycle

Q. Out of nutrient cycles of sulphur (a) phosphorus (b) carbon (c) and nitrogen (d), which one is sedimentary?

1. a only
2. b only
3. c only
4. a and b only
5. c and d only

Q. Phosphorus remain outside the natural cycle for a long time

1. Because bones and teeth take a long time to decompose
2. When the bodies of the organisms excrete and decompose
3. Both a and b
4. None of the above

Q. Phosphorus is mostly found in rocks in a combination with

1. Calcium
2. Iron
3. Aluminium
4. All of the above

Q. Cycling of elements in an ecosystem is called as

1. Chemical cycle
2. Geochemical cycle
3. Biogeochemical cycle
4. Geological cycle