Lake Ecosystem Concepts and Organisms

The video tutorial by Sadiq Ali from Ms Education Academy covers important eight-mark questions for intermediate first-year zoology exams, focusing on the lake as an ecosystem. It explains the roles of producers, consumers, and decomposers in different zones of a lake ecosystem, emphasizing the importance of understanding these concepts for exam success.

What is the significance of the 'Lake as an ecosystem' topic in exams?

• It is not included in the exams.

• It is an eight-mark question.

• It is a four-mark question.

• It is a two-mark question.

Which of the following are considered producers in a lake ecosystem?

• Zooplankton

• Phytoplanktons

• Fish

• Amphibians

What type of plants are hydrophytes?

• Forest plants

• Desert plants

• Mountain plants

• Aquatic plants

Which of the following is an example of a free-floating plant?

• Sagittaria

• Pistia

• Taifa

• Hydrilla

What are zooplankton?

• Plants that float on water

• Microscopic organisms with strong locomotory structures

• Microscopic organisms with weak locomotory structures

• Large aquatic animals

Which animals live in the air-water interface?

• Hydrophytes

• Benthos

• Newston

• Zooplankton

What is the primary characteristic of the profound zone in a lake?

• Low oxygen levels

• Abundant sunlight

• Rich in phytoplanktons

• High oxygen levels

Which organisms are primarily found in the profound zone?

• Phytoplanktons

• Decomposers

• Consumers

• Producers

What is the role of decomposers in the lake ecosystem?

• They decompose dead plants and animals.

• They produce oxygen.

• They photosynthesize.

• They consume producers.

What is recommended for impressing the examiner in the exam?

• Using complex terminology

• Drawing simple diagrams and mind maps

• Avoiding diagrams

• Writing long essays