Ecological balance may be disturbed due to the introduction of new species, natural hazards or human causes. Human interference has affected the balance of plant communities leading to disturbances in the ecosystems.
What is an ecological balance class 11th?
Ecological balance is a state of dynamic equilibrium within a community of organisms in a habitat or ecosystem. 2. It can happen when the diversity of the living organisms remains relatively stable. 3. Gradual changes do take place but that happens only through natural succession.
What are the causes of ocean currents Class 11?
Primary Forces: The primary forces that influence the currents are:
- Heating by solar energy: Heating by solar energy causes the water to expand. …
- Wind: Wind blowing on the surface of the ocean pushes the water to move. …
- Gravity: Gravity tends to pull the water down the pile and create gradient variation.
Which of the following is included in biosphere?
The correct answer is all living and non-living organisms. The biosphere is a narrow zone on the surface of the earth where soil, water, and air combine to sustain life. Life can only occur in this zone. All living and non-living organisms are included in the biosphere.
Why is biosphere important class 11?
The biosphere is the narrow interaction zone between the air, water, and soil. In an ecosystem, it provides habitat. … -The biosphere is therefore important for the survival and life of living organisms.
How does ecological balance get disturbed?
The most important point being that the natural balance in an ecosystem is maintained. This balance may be disturbed due to the introduction of new species, the sudden death of some species, natural hazards or man-made causes.
What is ecological balance explain its importance?
Ecological balance is a term used to describe the equilibrium between living organisms such as human being, plants, and animals as well as their environment. … Therefore, this balance is very important because it ensures survival, existence and stability of the environment.
What are the causes of currents?
Oceanic currents are driven by three main factors:
- The rise and fall of the tides. Tides create a current in the oceans, which are strongest near the shore, and in bays and estuaries along the coast. …
- Wind. Winds drive currents that are at or near the ocean’s surface. …
- Thermohaline circulation.
What are the effects of ocean currents class 11th?
The vertical motion refers to tides. Ocean currents are the continuous flow of huge amount of water in a definite direction while the waves are the horizontal motion of water. Water moves ahead from one place to another through ocean currents while the water in the waves does not move, but the wave trains move ahead.
What are the causes of current in geography?
i. Prevailing winds: Prevailing winds influence the ocean currents more than any other single factor. These winds blow in a particular direction and drag the surface water due to the force of friction. This leads to the formation of ocean currents.
What is the ecological balance discuss the important measures needed to prevent ecological imbalance?
The important measures to prevent ecological imbalances are: By not interfering in nature. By controlling population. By reusing and recycling things.
What is an ecological balance mention the important measures needed to prevent ecological balance?
Recycle to prevent the exploitation of natural resources. Conserve energy by choosing more energy efficient appliances and automobiles. Plant more trees and stop deforestation. This will help in reducing the pressure on our ecosystem.
How long ago did life on Earth?
The earliest life forms we know of were microscopic organisms (microbes) that left signals of their presence in rocks about 3.7 billion years old.
Why the Earth is called Blue planet?
Planet Earth has been called the “Blue Planet” due to the abundant water on its surface. … Liquid water covers most of the surface of our planet.
Why is the biosphere such an important realm what causes disturbance in it?
Answer: The biosphere is as important as life itself because it is all of life. Without the biosphere, the Earth would be a lifeless planet such as Mars or Venus. … Humans can have a huge impact on the biosphere, in both good and bad ways.
What are some of the issues which biosphere faces which causes serious challenges?
Pollution and waste management. Water quality in rivers and streams that flow into the marine environment. Impacts of climate change (storm surge, coastal inundation and erosion; inland flooding; increased fire risk; threats to human health, water supplies and infrastructure; and pressure on biodiversity)