Podcast
Questions and Answers
What characterizes a complicated ecosystem compared to a simple ecosystem?
What characterizes a complicated ecosystem compared to a simple ecosystem?
Why are natural protectorates important for endangered species?
Why are natural protectorates important for endangered species?
Which of the following is NOT a method to protect endangered species?
Which of the following is NOT a method to protect endangered species?
How does a simple ecosystem respond to the absence of one of its species?
How does a simple ecosystem respond to the absence of one of its species?
Signup and view all the answers
What is a primary characteristic of a simple ecosystem?
What is a primary characteristic of a simple ecosystem?
Signup and view all the answers
What is the definition of extinction?
What is the definition of extinction?
Signup and view all the answers
Which factor is NOT considered a reason for macro extinctions in old ages?
Which factor is NOT considered a reason for macro extinctions in old ages?
Signup and view all the answers
Which of the following is a reason for recent extinctions?
Which of the following is a reason for recent extinctions?
Signup and view all the answers
Which organism is an example of an extinct species from ancient times?
Which organism is an example of an extinct species from ancient times?
Signup and view all the answers
Which species is protected within the Yellowstone protectorate?
Which species is protected within the Yellowstone protectorate?
Signup and view all the answers
What type of marine life does the Ras Mohamed protectorate mainly protect?
What type of marine life does the Ras Mohamed protectorate mainly protect?
Signup and view all the answers
What role do fossil records play in understanding extinction?
What role do fossil records play in understanding extinction?
Signup and view all the answers
Which protectorate is known for containing complete whales' skeleton fossils?
Which protectorate is known for containing complete whales' skeleton fossils?
Signup and view all the answers
Which of the following is an example of how human activities have contributed to extinction?
Which of the following is an example of how human activities have contributed to extinction?
Signup and view all the answers
What was one of the main factors causing recent extinction?
What was one of the main factors causing recent extinction?
Signup and view all the answers
Which of the following describes the dodo bird?
Which of the following describes the dodo bird?
Signup and view all the answers
Which of the following is an example of a recently extinct species?
Which of the following is an example of a recently extinct species?
Signup and view all the answers
What is one implication of continuous decrease in species numbers?
What is one implication of continuous decrease in species numbers?
Signup and view all the answers
What percentage of the total area of Egypt is comprised of natural protectorates as of 2012?
What percentage of the total area of Egypt is comprised of natural protectorates as of 2012?
Signup and view all the answers
Which of these factors has NOT contributed to macro extinctions?
Which of these factors has NOT contributed to macro extinctions?
Signup and view all the answers
Which species is considered endangered?
Which species is considered endangered?
Signup and view all the answers
What is the primary consequence of species extinction in a balanced ecosystem?
What is the primary consequence of species extinction in a balanced ecosystem?
Signup and view all the answers
Which of the following organisms is considered a producer in the food chain?
Which of the following organisms is considered a producer in the food chain?
Signup and view all the answers
What happens to the food chain when frogs are removed from the ecosystem?
What happens to the food chain when frogs are removed from the ecosystem?
Signup and view all the answers
Which of these species is categorized as an endangered species mentioned?
Which of these species is categorized as an endangered species mentioned?
Signup and view all the answers
What characterizes a simple ecosystem?
What characterizes a simple ecosystem?
Signup and view all the answers
In the absence of snakes, which population is likely to increase?
In the absence of snakes, which population is likely to increase?
Signup and view all the answers
Which species serves as a link in the food chain described?
Which species serves as a link in the food chain described?
Signup and view all the answers
In what way does the Ibis bird contribute to Egyptian ecosystems?
In what way does the Ibis bird contribute to Egyptian ecosystems?
Signup and view all the answers
Study Notes
Extinction
- Extinction is the continuous decline in the number of a species, without compensation, until the species dies out.
- It signifies the disappearance of all members of a species.
- Fossil records trace the sequence of extinct species and living organisms that existed on Earth millions of years ago in sedimentary rock layers.
- Fossil records show the different types of organisms that lived in different ages of Earth's history.
Causes of Extinction
- Ancient Causes (Macro Extinctions): Meteorite impacts, Earth's violent movements, long ice ages, and volcanic eruptions.
- Modern Causes (Recent Extinctions): Natural habitat destruction, overhunting, environmental pollution, and climate change/natural disasters.
- Extinction events cause disturbances in an ecosystem.
Endangered Species
- Thousands of species face extinction.
- Several examples include pandas, rhinos, ibises, bald eagles, Barbary sheep, and papyrus plants.
Food Chain and Food Webs
- A food chain shows the energy flow from one organism to another in an ecosystem.
- Organisms play roles as producers (e.g., plants), first-level consumers (e.g., locusts), second-level consumers (e.g., frogs), third-level consumers (e.g., snakes), and top-level consumers (e.g., owls).
- A food web is a network of interconnected food chains.
- The absence of a species in a food web affects other members of the ecosystem.
Ecosystems
- Ecosystems are classified based on their response to species extinction.
- Simple Ecosystems: Composed of a few organisms, significantly affected by the loss of a single species.
- Complex Ecosystems: Contains many species, less affected by the loss of a species. There are often alternative organisms to perform the roles of the extinct species.
- Examples include deserts and tropical forests.
Natural Protectorates
- Natural protectorates are protected areas where endangered species can thrive.
- These protected areas protect endangered species from their natural enemies.
- Examples include Yellowstone, Panda, Ras Mohamed and Wadi El-Hetan.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
