The biconcave shape of red blood cells is determined by membrane-anchored internal proteins called
A. phospholipids.
B. spectrins.
C. cytoskeleton.
D. clathrins.
E. actin filaments.
Answer: B
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The ____ are the primary photosynthetic organisms of marine plankton
a. apicomplexans b. diatoms c. dinoflagellates d. parasitic ciliates e. free-living ciliates
Prokaryotes can acquire new DNA via transformations, transduction, and which of the following?
a. mitosis b. meiosis c. conduction d. conjugation
What adaptations have evolved in birds to assist them in flight?
What will be an ideal response?
The products of mitosis are
a. one nucleus containing twice as much DNA as the parent nucleus. b. two genetically identical cells. c. four nuclei containing half as much DNA as the parent nucleus. d. four genetically identical nuclei. e. two genetically identical nuclei.