Pyramid of numbers in a grassland/true ecosystem is[1990, 91]a)always invertedb)always uprightc)both A and Bd)spindle-shapedCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

Pyramid of number in a grassland/tree ecosystem is always upright. It shows the number of individual organisms at each level. In a grassland, the producers, which are mainly grasses, are always maximum in number. This number then shows a decrease towards apex, primary consumers are lesser in number than the grasses; the secondary consumers are lesser in number than the primary consumers. Finally, the top consumers are least in number. Thus, the pyramid becomes upright.

Answer

Always upright because producers are always more in number then herbivores and herbivores are more in number then carnivore.

Answer

Pyramid of Numbers in a Grassland/True Ecosystem

In a grassland or true ecosystem, the pyramid of numbers refers to the graphical representation of the number of organisms at each trophic level. It represents the number of individuals in a population and how that number changes as you move up the food chain. The correct answer is option 'B', which states that the pyramid of numbers is always upright in a grassland/true ecosystem.

Explanation:

1. What is a pyramid of numbers?
- A pyramid of numbers shows the number of organisms at each trophic level in a food chain or food web.
- It represents the relationship between producers, primary consumers, secondary consumers, and so on, in terms of their population sizes.

2. Inverted pyramid of numbers:
- In some ecosystems, like a parasitic food chain, the pyramid of numbers can be inverted.
- This occurs when there are fewer producers than consumers.
- For example, in a parasitic food chain, a single parasite may have many hosts, resulting in a smaller number of producers (hosts) compared to the number of consumers (parasites).

3. Upright pyramid of numbers in a grassland/true ecosystem:
- In a grassland or true ecosystem, the pyramid of numbers is always upright.
- This means that the number of producers is higher than the number of primary consumers, the number of primary consumers is higher than the number of secondary consumers, and so on.
- This is because grasslands have a large number of producers, such as grasses, which support a smaller number of herbivores (primary consumers), which in turn support an even smaller number of carnivores (secondary consumers), and so on.

4. Reasons for an upright pyramid of numbers in a grassland/true ecosystem:
- Producers (grasses) have a high rate of reproduction, leading to a large population size.
- Primary consumers (herbivores) feed on the abundant producers, but their population size is smaller than that of the producers.
- Secondary consumers (carnivores) feed on the herbivores, but their population size is even smaller.
- This pattern continues for higher trophic levels, resulting in an upright pyramid of numbers.

Conclusion:

In a grassland or true ecosystem, the pyramid of numbers is always upright. This is because the large population of producers supports smaller populations of primary consumers, which in turn support even smaller populations of secondary consumers. The pyramid of numbers is a visual representation of the relationship between trophic levels and population sizes in an ecosystem.

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