AP BIOLOGY

ECOLOGY

BIOMES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which biome creates 50% of the world’s oxygen?
A
Desert
B
Marine
C
Grasslands
D
Tundra
Explanation: 

Detailed explanation-1: -It’s important to remember that although the ocean produces at least 50% of the oxygen on Earth, roughly the same amount is consumed by marine life. Like animals on land, marine animals use oxygen to breathe, and both plants and animals use oxygen for cellular respiration.

Detailed explanation-2: -Yet this is only half true – phytoplankton produce roughly 50% of the oxygen we breathe. Phytoplankton are microorganisms that drift in the ocean and photosynthesize. They are often recognized for their role in harmful algae blooms (HABs), but they are so much more important than we give them credit for.

Detailed explanation-3: -Discuss Earth’s oxygen resources. Explain to students that rainforests are responsible for roughly one-third (28%) of the Earth’s oxygen but a huge amount (from 50% to 85%) of the oxygen in the atmosphere is produced by marine plants. The remaining 2 percent of Earth’s oxygen comes from other sources.

Detailed explanation-4: -Plankton may be small, but these tiny drifters play a huge role in aquatic ecosystems. Many animals, including whales, rely on them for food. Plankton that are plants, known as phytoplankton, grow and get their own energy through photosynthesis and are responsible for producing an estimated 80% of the world’s oxygen.

Detailed explanation-5: -Extensive measurements have shown that the highest oxygen concentrations are found at high latitudes, where the ocean is cold, especially well-mixed and ventilated.

There is 1 question to complete.