State the difference between a transgenic animal and a cloned animal.
What will be an ideal response?
Transgenic organisms are also called genetically modified organisms (GMOs). A GMO is an organism that has acquired one or more genes by artificial means. Recombinant DNA technology is used to combine DNA molecules from different sources. The rDNA is then transferred to the organism to create new traits and/or produce new products. Cloning is the production of identical copies. Cloning animals is to create animals that are genetically identical. This process involves the transfer of a nucleus from a donor adult somatic cell to an egg which has no nucleus. If the egg begins to divide normally it is transferred into the uterus of the surrogate mother.
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Sharks are osmoconformers, but have a rectal gland that is similar in function to the salt gland of sea birds and sea turtles. This is an adaptation to which of the following problems?
A. loss of ions B. gain of ions C. loss of water D. gain of water
We are currently in the
a. Archaean eon. b. Proterozoic eon. c. Paleozoic era. d. Mesozoic era. e. Cenozoic era.
A ____ is an underground stem that is greatly enlarged for food storage
a. sucker b. runner c. plantlet d. stolon e. tuber
The location on a bacterial chromosome where DNA replication begins is ________, and the binding of ________ opens up the double helix
a. oriC / DnaA b. oriC / DNA gyrase c. oriG / DnaA d. oriG / DNA gyrase