Before stem cell research was such a prominent topic in the news, many people were misinformed about embryonic stem cell research. Many people thought that this form of stem cell research could be completed only by collecting stem cells from electively
aborted fetuses. Explain specifically where embryonic stem cells come from when used for research and why these cells would not typically be found in aborted fetuses.
What will be an ideal response?
Embryonic stem cells are harvested from embryos that are made up of only 20 to 30 cells and are only a few days old. Because a female would not know she is pregnant at this time, it would be impossible to collect these cells from the embryo of a natural fertilization. For these cells to be collected, in vitro fertilization using donor egg and sperm must occur to create the embryos from which the stem cells will be harvested a few days later.
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A heterotrophic organism that consumes primary producers or those that consume primary producers is called a(n) ____
Fill in the blank with the appropriate word.
If light were prevented from reaching the right side of both retinas, what would occur?
a. The right half of the visual field would be lost. b. Only the right cerebral hemisphere would be stimulated by the light. c. No information about the light would be carried in the left optic nerve. d. The left half of the visual field would be lost. e. Sight would be lost.
Describe the three stages of labor
What will be an ideal response?
Mary, who has type O blood, is expecting a child with her husband, who has type B blood. Mary's husband's father has type A blood. What is the probability that the child will have type O blood?
a) 0% b) 10% c) 25% d) 50% e) 75%