Table of Contents
What are ecology and ecosystem?
Ecology is the scientific study of the relationships between organisms and their environment. An ecosystem is a community of living things and their physical environment.
MCQ on Ecology
1. Population ecology is the study of
A. the distribution and abundance of organisms
B. the interactions among organisms and their environment
C. the physiology of organisms
D. the genetic makeup of populations
B. The interactions among organisms and their environment are studied in population ecology.
MCQ on Ecosystem
An ecosystem consists of all the living things in an area and the nonliving things with which they interact. The living things in an ecosystem are called biotic factors, and the nonliving things are called abiotic factors.
The biotic factors in an ecosystem include the plants, animals, and microorganisms. The abiotic factors in an ecosystem include the air, water, soil, and sunlight.
The plants in an ecosystem are called producers. They use the sunlight, water, and soil to produce food. The animals in an ecosystem are called consumers. They eat the plants or other animals for food. The microorganisms in an ecosystem are called decomposers. They break down the dead plants and animals into their component parts.
The air in an ecosystem is called the atmosphere. It contains the gases nitrogen and oxygen, which are necessary for life. The water in an ecosystem is called the hydrosphere. It is necessary for life and is the source of all water on Earth. The soil in an ecosystem is called the pedosphere. It is necessary for plant growth and is a source of water and nutrients. The sunlight in an ecosystem is called the photosphere. It is necessary for plant growth.
The biotic and abiotic factors in an ecosystem interact with each other to form a complex web of relationships. The interactions between the biotic and abiotic factors are called ecosystem processes. Some of the most important ecosystem processes are photosynthesis, respiration
MCQ on Environmental Science
1. Which of the following is an example of a pollutant?
A. Fresh air
B. Carbon dioxide
C. Water
D. Soil
C. Water
Explain in detail :
There are three main types of market structures in economics- perfect competition, monopolistic competition, and oligopoly.
In perfect competition, there are many small firms and no barriers to entry. These firms produce a standardized good and sell it at a price that is determined by the market. Firms are price takers and cannot influence the price of the good. There is perfect information and no externalities.
In monopolistic competition, there are many small firms, but also a few large firms. These firms produce a differentiated good and sell it at a price that is determined by the market. Firms are price takers and cannot influence the price of the good. There is perfect information and no externalities.
In oligopoly, there are few firms and barriers to entry. These firms produce a differentiated good and sell it at a price that is determined by the market. Firms are price takers and cannot influence the price of the good. There is imperfect information and some externalities.
