In Any Ecosystem, Terrestrial or Aquatic, What Group(s)is (Are)always Necessary

question 74

Multiple Choice

In any ecosystem, terrestrial or aquatic, what group(s) is (are) always necessary?

• A) autotrophs and heterotrophs
• B) producers and primary consumers
• C) photosynthesizers
• D) autotrophs
• E) green plants

---

Definitions:

Fear

An emotional response to perceived threats or danger, often triggering a fight-or-flight response.

Neuroscientists

Scientists who specialize in the study of the nervous system, including the brain's structure, function, and development.

Research

The organized exploration and examination of materials and sources to determine facts and derive new insights.

Fear

An emotional response to a perceived threat, which can be real or imagined, leading to a variety of physiological and behavioral reactions.