AP BIOLOGY

Detailed explanation-1: -The abyssal zone is very cold and has very high pressure, high oxygen content, and low nutrient content. There are a variety of invertebrates and fishes found in this zone, but the abyssal zone does not have photosynthetic organisms.

Detailed explanation-2: -Streams and rivers start at the source zone, or headwaters, where water at high elevations collects from precipitation and snowmelt. This water is cold, fast moving, has lots of dissolved oxygen, and a low nutrient content. There are usually only a few plant species that grow near a river’s source.

Detailed explanation-3: -Often in the open ocean, however, nutrients are at their highest concentrations deep below the sunlit surface layer of the ocean.

Detailed explanation-4: -Marshes are defined as wetlands frequently or continually inundated with water, characterized by emergent soft-stemmed vegetation adapted to saturated soil conditions. There are many different kinds of marshes, ranging from the prairie potholes to the Everglades, coastal to inland, freshwater to saltwater.

Detailed explanation-5: -What are some examples of aquatic biome? Some aquatic biomes are coral reefs, estuaries, marine and freshwater biomes. These biomes are influenced by salt level, oxygen level, and nutrient availability, including the amount of sunlight needed for photosynthesis.