Frog oocytes are a useful experimental system for studying transporters, because frog oocytes possess all of the following characteristics except
A) they are large, easily injected cells.
B) they express all transporters known.
C) they express injected heterologous mRNAs.
D) they are relatively inexpensive and easy to obtain.
E) they can be maintained in little more than pure water.
Answer: B
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Which of the following is true of this person?
1.The person must be female because the mosaic pattern results from X inactivation.
2.The gene for the darker color is on the Y chromosome so one X chromosome is inactivated.
3.The darker color is expressed from the Barr body.
4.Dosage compensation ensures that there are equal numbers of light and dark skin cells.
An interaction in which one species benefits and the second species is neither harmed nor benefited is known as ____
a. mutualism b. parasitism c. commensalism d. competition e. predation
Lateral roots are the product of the
a. pericycle. b. vascular cylinder. c. epidermis. d. apical meristem. e. endodermis.
Non-inbred mice had a consistently lower survival than inbred mice
__________ Indicate whether the statement is true or false.