The wide variety of finches Darwin observed in the Galàpagos was thought provoking to him because they appeared to have descended from __________ population. Today we regard this as an example of ___________
A. the same; adaptive radiation
B. more than one; convergent evolution
C. the same; convergent evolution
D. more than one; adaptive radiation
A
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The developmental pathway of each whorl of a developing Arabidopsis flower is determined by (Select all correct choices):
A. the number of meristem cells in each whorl. B. the specific combination of genes active in each whorl. C. the specific combination of activities in each whorl. D. the specific combination of transcription factors present in each whorl. E. the specific combination of cell types in each whorl.
As light hits the retina in a human it must pass through this sequence of cells:
A. rod and cone cells, bipolar cells, ganglion cells, pigmented epithelium. B. bipolar cells, ganglion cells, pigmented epithelium, rod and cone cells. C. ganglion cells, rod and cone cells, bipolar cells, pigmented epithelium. D. ganglion cells, bipolar cells, rod and cone cells, pigmented epithelium.
Which of the following is not true of phospholipids?
A) Phospholipids are important in membrane structure. B) Serine is a molecule that may be part of a phosphoglyceride. C) Phosphatidic acid contains two fatty acids and a phosphate group. D) Sphingolipids are the predominant phospholipid in membranes. E) Phospholipids are amphipathic.
Why should we (multicellular organisms) care about cell division?
What will be an ideal response?