Question

compounds that must be acquired from the environment for cell survival are called ______.

amphipathic

nonpolar

hydrophlic

growth factors

Explanation:

• Amphipathic refers to molecules with both polar and nonpolar regions, not compounds acquired for cell survival.
• Nonpolar describes molecules with no net electrical charge, unrelated to the definition.
• Hydrophilic (note: spelling corrected from "hydrophlic") refers to water-attracting molecules, not survival-acquired compounds.
• Growth factors are extracellular compounds that cells must obtain from the environment to support survival, growth, and function, matching the given definition.

Answer:

D. growth factors