Which characteristic of stem cells is most useful when creating cell cultures?

They are not immortal.

They can be transformed into any type of body cell.

They can be obtained from embryos.

They can be obtained from adult tissues.

How do mutations lead to variation? A. by signaling proteins to be synthesized B. by producing changes in the genetic code C. by giving organisms new features for survival D. by providing a source of energy for cells Reset Next

Which prokaryotes contain peptidoglycan in their cell walls?

Currently the human population is exhibiting what type of growth

After studying the fossils of woolly mammoths and comparing them to the bones of modern-day elephants, Georges Cuvier proposed several new ideas about the history of life on earth.

Exposure to teratogens after organogenesis is complete may most likely result in select one: a. severe down syndrome. b. severe defects in the internal organs. c. severe anatomic defects. d. stunted growth.

Is an octopus a invertebrate chordate

Birds and reptiles are both vertebrates that lay eggs but birds have beaks and reptiles have teeth. Occasionally birds have teeth but only in the embryonic stage. Which conclusion is best supported by the presence of teeth in bird embryos? A.

What were Charles Darwin's observations?

What is the by-product of fermentation in humans

Why do organisms have to compete for resources