Question

below is a food web from an ocean ecosystem in monterey bay, off the coast of california. which two arrows show matter moving from a producer to a primary consumer? the arrow between the phytoplankton and the plainfin midshipman the arrow between the zooplankton and the kelp bass the arrow between the zooplankton and the plainfin midshipman the arrow between the zooplankton and the black rockfish the arrow between the phytoplankton and the zooplankton

Explanation:

To determine the arrows showing matter moving from a producer to a primary consumer, we first identify producers (organisms that make their own food, like phytoplankton and kelp) and primary consumers (organisms that eat producers).

• Phytoplankton is a producer. Zooplankton eats phytoplankton, so the arrow between phytoplankton and zooplankton is producer to primary consumer.
• Phytoplankton is also a producer, and plainfin midshipman eats phytoplankton, so the arrow between phytoplankton and plainfin midshipman is also producer to primary consumer.

The other options involve zooplankton (a primary consumer, not a producer) as the "source" of the arrow, so they are not producer - to - primary - consumer arrows.

Answer:

• the arrow between the phytoplankton and the plainfin midshipman
• the arrow between the phytoplankton and the zooplankton