Substantial Evidence Suggests That Differentiation Signals Influence the Developmental Pathway

question 66

Multiple Choice

Substantial evidence suggests that differentiation signals influence the developmental pathway taken by stem cell daughter cells. From what sources might these signals arise?

• A)the presence of specific adhesion molecules on neighboring cells
• B)the internal genetic program inherited from the dividing adult stem cell itself
• C)variations in the concentration of signal molecules involved in a signal transduction pathway
• D)All of the above are reasonable hypotheses.

---

Definitions:

Observation

A method of collecting data and insights by carefully monitoring behaviors or phenomena in natural or controlled environments.

Idea

A thought or suggestion as to a possible course of action, plan, or concept.

Experiment

A scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact, often involving the manipulation and control of variables.

B2B Products

Goods and services marketed and sold from one business to another, not directly to consumers.