COPY: Stem Cells Quiz

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Questions and Answers

Where are adult stem cells primarily found?

  • Lungs and liver
  • Brain and spinal cord
  • Heart and kidneys
  • Bone marrow and gonads (correct)

What distinguishes stem cells from progenitor cells?

  • Progenitor cells can proliferate indefinitely, while stem cells cannot
  • Stem cells are usually committed to differentiating into one cell type, while progenitor cells are pluripotent
  • Stem cells can divide indefinitely, while progenitor cells cannot (correct)
  • Progenitor cells can differentiate into various cell types, while stem cells cannot

What is the developmental stage when roughly 50–150 cells make up the inner cell mass in mammals?

  • Blastocyst stage (correct)
  • Fetal stage
  • Gastrulation stage
  • Embryonic stage

What do embryonic stem cells become when isolated and cultured in vitro?

<p>Kept in the stem-cell stage (B)</p> Signup and view all the answers

What do adult stem cells differentiate into?

<p>A few cell types or one type of cell (C)</p> Signup and view all the answers

What are the main functions of a stem in a vascular plant?

<p>Support, transport of fluids, storage of nutrients, production of new living tissue (C)</p> Signup and view all the answers

What is the main purpose of the nodes on a stem?

<p>Points of attachment for leaves and can hold one or more leaves (C)</p> Signup and view all the answers

What is the term used to describe fresh plant growth including both stems and other structures like leaves or flowers?

<p>Shoots (C)</p> Signup and view all the answers

Where are stems usually located in most plants?

<p>Above the soil surface (C)</p> Signup and view all the answers

What is the normal lifespan of plant cells in stems?

<p>One to three years (D)</p> Signup and view all the answers

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