Which of the following is a primary consumer in a freshwater ecosystem?(1 point)

Question

Responses

Zooplankton
Zooplankton

Duckweed
Duckweed

Dragonflies
Dragonflies

Alligators

Answer 1

In a freshwater ecosystem, the primary consumer is an organism that primarily feeds on producers, typically plants or algae.

Among the options given:

• Zooplankton are primary consumers as they consume phytoplankton (the producers).
• Duckweed is a producer (a plant).
• Dragonflies are predators and not primary consumers.
• Alligators are also predators and not primary consumers.

So, the correct answer is Zooplankton.

Answer 2

How much energy from the sun do secondary consumers capture in a freshwater ecosystem?(1 point)
Responses

0.1%
0.1%

1%
1%

10%
10%

100%
100%

Answer 3

In a freshwater ecosystem, the energy transfer from the sun to secondary consumers is generally represented by the energy pyramid concept.

Primary producers (like plants and algae) capture about 1% of the sunlight's energy through photosynthesis. Primary consumers (herbivores) then capture a portion of that energy, and secondary consumers (carnivores) capture a further reduced amount from the primary consumers.

Typically, secondary consumers capture about 10% of the energy available to primary consumers.

So, the correct answer is 10%.