AP BIOLOGY

ECOLOGY

CHEMICAL CYCLES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Why are algae so important in aquatic ecosystems?
A
They are primary producers
B
Break down dead organisms
C
Convert inorganic nitrogen into organic nitrates
D
recycle chemical compounds
Explanation: 

Detailed explanation-1: -They play a vital role in aquatic ecosystems by forming the energy base of the food web for all aquatic organisms. As autotrophic organisms, algae convert water and carbon dioxide to sugar through the process of photosynthesis.

Detailed explanation-2: -Primary producers-including bacteria, phytoplankton, and algae-form the lowest trophic level, the base of the aquatic food web. Primary producers synthesize their own energy without needing to eat. Many photosynthesize, using the sun’s energy to build carbohydrates.

Detailed explanation-3: -Algae are the main producers of photosynthetic materials in aquatic ecosystems, including unstable systems such as muds, sands, and intertidal aquatic habitats. Green algae are single-celled organisms that form colonies, or multicellular free-living organisms, all of which have chlorophyll b.

Detailed explanation-4: -50% of all oxygen production) is another reason for saying “our lives depend on algae.” Those who love seafood should thank the algae because algae are the primary producers upon which aquatic ecosystems depend.

There is 1 question to complete.