Which Trophic Level Forms the Base of a Food Chain

question 46

Multiple Choice

Which trophic level forms the base of a food chain?

• A)primary consumers
• B)quaternary consumers
• C)secondary consumers
• D)primary producers
• E)tertiary consumers

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Definitions:

Blood Calcium

The level of calcium ions in the bloodstream, critical for various bodily functions including bone health, nerve transmission, and muscle function.

Neuroendocrine Cells

Cells that receive neuronal input and as a response, release message molecules (hormones) into the blood, functioning both as neurons and endocrine cells.

Oxytocin

Oxytocin is a hormone and neurotransmitter involved in childbirth, lactation, and the regulation of social bonding and trust.

Tropic Hormones

Tropic hormones are hormones that have other endocrine glands as their target. They are secreted by the anterior pituitary gland and stimulate the release of other hormones.