4. Gr 11 Life Sciences - Population Ecology - Worksheet 1

Summary

In this educational video, Mr. P guides Grade 11 students through population ecology, focusing on exam techniques for final exams. He explains the difference between inter and intraspecific competition using kittens as an example. The video covers symbiosis types like commensalism and mutualism, resource partitioning, and social organization's impact on survival. Mr. P also emphasizes the importance of understanding key ecological terms for success in exams, providing examples and explanations for terms like mortality, natality, and territoriality.

Takeaways

• 📚 The video is a tutorial aimed at grade 11 students focusing on population ecology.
• 👨‍🏫 Mr. P is the instructor guiding students through worksheet questions related to population ecology.
• 📝 The tutorial covers various types of questions, including multiple-choice and terminology questions.
• 🐱 The example used in the video explains the difference between interspecific and intraspecific competition using kittens competing for their mother's milk.
• 🤝 The concept of symbiosis is discussed, highlighting commensalism where one species benefits and the other is unaffected.
• 🌿 Resource partitioning is explained as a strategy where organisms with overlapping niches coexist by using resources differently.
• 🐝 Social organization that increases survival chances, such as division of labor in bees and zebras forming herds, is discussed.
• 🔍 The video emphasizes the importance of understanding key terms in population ecology for exam preparation.
• 📊 The tutorial mentions the use of simple sampling as a method for determining population size.
• 🌱 The video script is part of a series of educational content designed to help students prepare for their final examinations.
• 📑 Students are encouraged to obtain the worksheet for additional practice questions to enhance their understanding of population ecology.

Q & A

What type of competition is exemplified by kittens competing for their mother's milk?

Intraspecific competition, as it occurs within the same species.

What is the term for a symbiotic relationship where one species benefits and the other is unaffected?

Commensalism.

How does resource partitioning differ from time partitioning in the context of ecological niches?

Resource partitioning refers to different species using the same resources in slightly different ways, while time partitioning involves species using resources at different times.

What social organization in animals increases their chances of survival?

Division of labor in bees and a herd of zebras staying together are examples of social organizations that increase survival chances.

What is the biological term for a pattern of relationships among individuals that benefits the society?

Social organization.

What method is used to determine population size by counting individuals in a representative sample area?

Simple sampling.

What term describes competition for resources between individuals of the same species?

Intraspecific competition.

What is the term for the coexistence of different species living in the same habitat by using resources differently?

Resource partitioning.

What is the symbiotic relationship in which one organism benefits and the other is unaffected called?

Commensalism.

What term describes the death of individuals in a population?

Mortality.

What is the characteristic of countries with high birth rates and decreased life expectancy?

Developing countries.

What is the term for a group of organisms of the same species occupying a particular habitat and having the ability to interbreed randomly?

Population.

What is the inherent ability of a population to increase by birth called?

Natality.

What is the term for the tendency of a certain species to defend an area within a habitat they occupy against any type of intruder?

Territoriality.