Environment and Nature Quiz

Earth Day is observed annually on April 22nd to raise awareness about environmental protection. It was first celebrated in 1970 and is now coordinated globally by the Earth Day Network.

The ozone layer in the stratosphere absorbs most of the Sun's ultraviolet (UV) radiation, protecting living organisms from harmful UV rays that can cause skin cancer and DNA damage.

Earthworms improve soil fertility through burrowing, which aerates the soil and enhances water infiltration. Their digestive process converts organic matter into nutrient-rich castings (vermicast) that boost soil nutrient content and structure. Beetles and roundworms don't contribute to soil fertility in the same way, while ringworm is actually a fungus that causes infection.

After carbon dioxide (the most abundant anthropogenic greenhouse gas), methane is considered the second most significant greenhouse gas due to its high global warming potential - about 28 times more effective than CO2 at trapping heat over 100 years. Sulfur is not a greenhouse gas, and oxygen is not a greenhouse gas at all.

Dynamite fishing destroys coral reef ecosystems by blasting coral formations, which take decades to recover. Avoiding destructive fishing practices is essential for coral conservation. Using artificial reefs (option C) can help but doesn't address the root problem of destruction, and intentionally destroying reefs (B) or using dynamite (A) are actively harmful practices.

World Environment Day is observed annually on June 5th, established by the United Nations in 1973 to raise awareness about environmental protection. It's celebrated globally with various themes each year focusing on pressing environmental issues like pollution, climate change, and biodiversity loss.

Rafflesia (note spelling in option is 'Rafflessia') produces the world's largest individual flower, reaching up to 1 meter in diameter and weighing up to 11 kilograms. Found in Southeast Asian rainforests, it's a parasitic plant with no visible leaves or stems. Sunflowers can grow tall but have smaller flower heads, while dahlias and marigolds are much smaller.

Malaria primarily affects the liver and red blood cells. The Plasmodium parasite first develops in the liver, then infects red blood cells causing them to rupture. The spleen becomes enlarged as it works to filter out the damaged, infected red blood cells. While the parasite circulates in blood, the liver and spleen are the primary organs that sustain damage.

Shark liver oil is a known product obtained from shark livers, historically used as a source of vitamin A and in some traditional medicines. While seals also produce blubber that can be rendered into oil, the question format and answer key point to shark as the intended answer. Donkeys and rabbits are not sources of commercial oils.

Carbon dioxide (CO2) is the primary anthropogenic greenhouse gas, trapping heat in Earth's atmosphere and contributing to global warming. Oxygen and nitrogen make up most of our atmosphere but are not greenhouse gases - they don't absorb infrared radiation. Helium is a noble gas and also not a greenhouse gas.

EPA indeed stands for Environmental Protection Agency, which is the United States government agency established in 1970 to protect human and environmental health. It sets and enforces regulations related to air and water quality, waste management, and pollution control.