When comparing the outside and inside halves of a cell membrane's phospholipid bilayer, the
composition of lipids on the two surfaces is ____.
a. asymmetrical
b. identical
c. not identical, but symmetrical
d. highly random and varies throughout the cell
e. a mirror image
A
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A population descending from a single organism or pure culture isolate is called a ________.
A. subspecies B. strain C. species D. genus
Compare and contrast the two types of transposable elements found in bacteria. Provide examples of how transposable elements can be both harmful and beneficial to bacteria
What will be an ideal response?
Which statement best describes how flight and feathers are related in the evolution of birds?
A) The first flying birds did not have feathers, which evolved later. B) Feathers and flight evolved at the same time. C) The first feathered ancestors to birds did not fly but may have used their feathers for insulation and display. D) Feathers are soft and do not leave fossils or fossil traces, so it is unknown which organisms first had feathers.
What does the abbreviation LUCA stand for and what does it mean?
What will be an ideal response?