A Scientist Suspects That Food in an Ecosystem May Have

question 112

Multiple Choice

A scientist suspects that food in an ecosystem may have been contaminated by radioactive nitrogen over a period of several months. Which of the following should be isolated from mammals living in the ecosystem and examined for radioactivity in order to test the hypothesis?

• A) glycogen
• B) DNA
• C) hair
• D) fat

---

Definitions:

Glutamate

An excitatory neurotransmitter crucial for brain functions including learning and memory, acting as a chemical messenger in the nervous system.

Postsynaptic Membrane

Membrane on the transmitter, or input, side of a synapse.

Enriched Environment

An enriched environment refers to settings that provide increased sensory, cognitive, and physical stimulation to promote improved neurological and behavioral outcomes.

Neurons

Specialized cells transmitting nerve impulses; the basic building blocks of the nervous system.