Gr.7-Remedial Support Session for SBQ2-Monday-Oct21, 2024

Which term refers to the maximum number of individuals that an environment can support?

• Biotic potential

• Carrying capacity

• Limiting factor

• Exponential growth

Answer explanation

The term 'carrying capacity' refers to the maximum number of individuals an environment can sustainably support, making it the correct choice. Other options describe different ecological concepts.

Which of the following best defines an ecosystem?

• A group of individuals of the same species living in the same area.

• A community of living organisms interacting with each other and their physical environment.

• All the species that live together in the same geographic location.

• A group of populations that belong to the same species.

Answer explanation

An ecosystem is best defined as a community of living organisms interacting with each other and their physical environment, encompassing both biotic and abiotic components.

The ability of a population to grow under ideal conditions without limiting factors is called:

• Carrying capacity

• Biotic potential

• Logistic growth

• Environmental resistance

Answer explanation

Biotic potential refers to the maximum capacity of a population to grow under ideal conditions, without any limiting factors. This distinguishes it from carrying capacity, which considers environmental limits.

Which factor is likely to increase population size?

• Increase in predation

• Decrease in food supply

• Increase in birth rates

• Increase in disease outbreak

Answer explanation

An increase in birth rates directly contributes to a larger population size, as more individuals are being born. In contrast, factors like increased predation, decreased food supply, and disease outbreaks typically reduce population size.

What is a climax community in ecological succession?

• The first stage of colonization in a new habitat.

• A community that is dominated by pioneer species.

• A stable and mature community that has reached the final stage of ecological succession.

• A community that undergoes rapid changes due to disturbances.

Answer explanation

A climax community is a stable and mature ecosystem that has reached the final stage of ecological succession, characterized by a balanced and self-sustaining environment, unlike earlier stages dominated by pioneer species.

Which of the following best describes ecological succession?

• The process by which one species eliminates another in a habitat.

• The gradual process of change and replacement of the species in a community over time.

• The migration of species from one ecosystem to another.

• The extinction of species in a community due to human activities.

Answer explanation

Ecological succession refers to the gradual process of change and replacement of species in a community over time, making the second choice the best description. The other options do not accurately define this concept.

Which is an example of a limiting factor in an ecosystem?

• The amount of sunlight

• The number of predators

• The size of the population

• The presence of decomposers

Answer explanation

The amount of sunlight is a limiting factor because it directly affects photosynthesis, influencing plant growth and, consequently, the entire ecosystem. Without sufficient sunlight, other organisms cannot thrive.

In a symbiotic relationship if one organism benefits and the other organism is harmed, then what is it called?

• Mutualism

• Parasitism

• Commensalism

• Predation

Answer explanation

In a symbiotic relationship, if one organism benefits while the other is harmed, it is called parasitism. This contrasts with mutualism, where both benefit, and commensalism, where one benefits without affecting the other.

What is predation?

• A mutualistic relationship between two species.

• The interaction where one organism captures and feeds on another organism.

• A competition between organisms for limited resources.

• A form of symbiosis where both organisms benefit.

Answer explanation

Predation is defined as the interaction where one organism captures and feeds on another organism. This distinguishes it from mutualism and competition, which involve different types of relationships between species.

What characterizes primary succession?

• It occurs in an area where soil and living organisms already exist.

• It begins on bare rock or a substrate without soil.

• It involves the gradual replacement of one community by another.

• It is primarily caused by human activities.

Answer explanation

Primary succession begins on bare rock or a substrate without soil, distinguishing it from secondary succession, which occurs in areas where soil and organisms already exist.