Which type of stem cell is described below? stem cells are available from a variety of sources, including blood from an umbilical cord, or cells in the placenta, the bone marrow, and even human fat.

Aboy with an extra x chromosome probably has which of the following syndromes?

How can an organ, such as the lungs, work for multiple body systems?

During a fierce storm a large number of tall trees on an island are uprooted by the wind and die. most of the trees on the island are now short trees and produce seeds that grow into short trees. what concept is shown in this example? question 5 options: natural selection artificial selection genetic engineering gene splicing