Explain why identical twins are clones What will be an ideal response?
ANSWER: Clones are defined as molecules, cells, or individuals derived from a single ancestor. When a
fertilized egg divides to form two cells, those cells usually remain attached to each other and
become parts of one embryo. In a small number of cases, the cells separate from each other
and form separate embryos that become identical twins. Because they are derived from a
single ancestral cell, identical twins are clones
You might also like to view...
If a thylakoid is placed in a basic solution, ATP synthesis will occur. How is this possible?
A. The carbon reactions are blocked in the thylakoid at high pH. B. A proton gradient is created by the difference in pH. C. ATP cannot be broken down at low pH. D. An electron gradient is created by the difference in pH. E. ATP is formed spontaneously at low pH.
An advantage of storing energy as fat as opposed to glycogen is that fat
a. feeds sugars directly into glycolysis. b. requires more associated water during storage, providing a water reserve. c. stores more calories in each gram. d. is easier to transport through the bloodstream. e. provides a storage reserve for B vitamins.
When cells are not responding to normal controls over
growth and division, they form a tissue mass known as a a. metastasis. b. malignancy. c. tumor. d. carcinogen. e. nucleosome.
A morphogen is a chemical agent that affects the differentiation of cells and the development of form. Indicate whether the statement is true or false