Question

in the kelp forest food web, which three organisms are producers?
giant kelp, feather boa kelp, and bacteria
large fish, crustaceans, and sunflower starfish
sea urchins, snails, and kelp crab
horn sharks, northern elephant seals, and sea otters
question 40
1 pts
there are several organisms as keystone organisms to kelp forests. which of the following is listed as one of these key organisms?
california sea otter
horn shark
northern elephant seal
sea urchins

Explanation:

First Question (Producers in Kelp Forest Food Web)

Producers in a food web are organisms that can make their own food, typically through photosynthesis (like plants or algae) or sometimes chemosynthesis (like some bacteria). Giant Kelp and Feather boa kelp are types of algae (kelp) that perform photosynthesis, so they are producers. Bacteria can be producers (e.g., photosynthetic or chemosynthetic bacteria). The other options: Large Fish, Crustaceans, Sunflower Starfish are consumers; Sea Urchins, Snails, Kelp Crab are consumers; Horn Sharks, Northern Elephant Seals, Sea Otters are consumers.

Keystone organisms have a disproportionately large impact on their ecosystem. California sea otters are keystone species in kelp forests because they eat sea urchins, which otherwise would overgraze kelp. Horn Sharks, Northern Elephant Seals, and Sea Urchins (while sea urchins are important, the sea otter is the classic keystone here) are not the primary keystone in the way sea otters are.

Answer:

A. Giant Kelp, Feather boa kelp, and Bacteria

Question 40 (Keystone Organisms in Kelp Forests)