Select the statements that accurately describe examples of small-scale ecosystems.
- A tropical rainforest is an example of a small ecosystem.
- An aquarium tank represents a confined, small-scale ecosystem.
- A test tube experiment containing phytoplankton demonstrates a very small ecosystem.
- Oceans are considered small ecosystems.
Which of the following examples correctly represents a large-scale ecosystem?
- An aquarium tank with plants and fish.
- A test tube experiment of phytoplankton.
- The Sahara desert.
- A single tree in a garden.
Identify the incorrect statement regarding ecosystem boundaries.
- Ecosystem boundaries are always clearly defined and rigid.
- Geographical barriers like mountains can separate different ecosystems.
- Ecosystems frequently blend into one another rather than having sharp divisions.
Which of the following statements about the size and scale of ecosystems is correct?
- Ecosystems always maintain a fixed, predictable size.
- The scale of an ecosystem can range from extremely large to very small.
- A tropical rainforest is an example of a small-scale ecosystem.
Consider the relationship between ecosystem stratification, diversity, productivity, and stability. Which statement is incorrect?
- The degree of stratification in an ecosystem is often inversely proportional to its diversity.
- Ecosystems with higher degrees of stratification generally exhibit greater stability.
- Increased stratification can lead to a more diverse and productive ecosystem.
Which of the following accurately describes how strata are formed in an ecosystem?
- Strata are formed primarily by the decomposition of organic matter on the forest floor.
- Plants or trees within an ecosystem organize into several height classes, forming distinct layers.
- Plants belonging to the same height class are considered to be part of the same stratum.
- The presence of animal populations at different altitudes determines ecosystem stratification.
Identify the incorrect statement regarding stratification in an ecosystem.
- Stratification refers to the horizontal arrangement of organisms across a landscape.
- It involves the presence of distinct layers or 'strata' in the vertical structure of an ecosystem.
- Different height classes of plants or trees contribute to the formation of strata.
Analyze the relationship between species diversity, productivity, and stability. Which statements are true?
- Species diversity is generally inversely proportional to the productivity of an ecosystem.
- Higher species diversity typically leads to increased ecosystem stability.
- Ecosystem productivity tends not to be proportionate to its species diversity.
Consider the role of Keystone species in an ecosystem. Which of the following statements is correct?
- Keystone species are always the most abundant species in an ecosystem.
- The destruction of keystone species can lead to the collapse of the entire ecosystem.
- Keystone species play a critically important role in not maintaining the structure and function of an ecosystem.
Regarding the definition of 'species', identify the correct statements.
- A species is the basic unit of classification in biology.
- Members of the same species typically interbreed freely with one another under natural conditions.
- Individuals from different species can freely interbreed and produce fertile offspring.
Which of the following statements accurately describe species composition in an ecosystem?
- Species composition refers to the total biomass of all organisms present in an ecosystem.
- It is also known as species richness or species diversity.
- It measures the number of different species found in a particular ecosystem.
Certain statements regarding improvisation of learning aids are given below :
(i) Improvised aids provides a good alternative to the not easily available aids
(ii) It can be helpful in making teaching a child-centered activitys
(iii) Improvised aids are simple and easy to handle
(iv) Improvised aids are expensive but repairable
Read the following statements about the Anti-Defection Law.
A nominated member is disqualified if they join a political party within six months of taking their seat.
An independent member is disqualified if they join any political party after their election.
Which of the statements given above is/are correct?