Every year 20,000 species go extinct. Thus, the correct option for this question is D.
Species may be defined as a cluster of organisms that can significantly reproduce with one another in nature in order to produce fertile offspring. It involves identical organisms that interbreed with one another in order to exchange genes. It is responsible for creating fertile organisms.
Species extinction is the ecological force that derives the mechanism of elimination of species from their native environment. This stimulates due to varieties of external influences like lack of food, space, mating selection, involvement of human activities, the action of predators, etc.
So, due to these external influences, it is found in research that approximately 20,000 species go extinct every year.
Therefore, every year 20,000 species go extinct. Thus, the correct option for this question is D.
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Answer:
Answer is given below:
Explanation:
Function of vitamin C is healing wounds. Its deficiency causes multiple effects on connective tissue. It decreases the amount of collagen synthesis and angiogenesis and increases the amount of fibroblast and also increases capillary fragility and definitely because of its deficiency wound will not be healed properly or may not be healed.
a pH 7 solution
a pH 2 solution
a pH 12 solution
Renewable resources can be naturally replenished, while nonrenewable resources are finite and deplete over time. Human activities significantly influence the environment, often leading to environmental degradation, but the shift towards renewable resources can mitigate these impacts and promote sustainability.
Renewable and nonrenewable resources are two distinct categories of natural resources, each with significant implications for the environment.
Renewable Resources:
Definition: Renewable resources are those that can be naturally replenished or regenerated within a relatively short time frame. They are sustainable over the long term and have the ability to renew themselves.
Examples:
a. Solar Energy: Solar panels harness energy from the sun, a virtually limitless source of power.
b. Wind Energy: Wind turbines convert wind motion into electricity.
c. Forests: Trees can be replanted and regrown, providing timber and other forest products.
Nonrenewable Resources:
Definition: Nonrenewable resources are finite and deplete over time. They cannot be readily replaced within human timeframes.
Examples:
a. Fossil Fuels: Coal, oil, and natural gas are finite energy sources formed over millions of years.
b. Minerals: Metals like gold and non-metals like diamonds are extracted from the Earth's crust.
c. Nuclear Fuel: Uranium is a finite resource used for nuclear power generation.
Human Activities and Environmental Impact:
Human activities have profound effects on the environment. For example, the burning of fossil fuels for energy production contributes to air pollution and climate change. Deforestation disrupts ecosystems and reduces biodiversity. Mining operations can lead to habitat destruction and water pollution. Conversely, renewable energy sources like wind and solar power produce fewer greenhouse gas emissions and have a lower impact on the environment.
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In food chains, the flow of energy is ALWAYS one-way
b. the ocean floor is not spreading
c. none of the ocean floor is more than about 180 million years old
d. most of the ocean floor is more than 180 million years old
Answer:
The Answer Is C.
Explanation:
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gas
coal
all of the above