#Question id: 7152
#Unit 5. Developmental Biology
The size of a cell is generally controlled by the amount of DNA in the nucleus: the more DNA, the larger the cell. What do experiments in which the amount of DNA is doubled (tetraploidy in salamanders) tell us about growth control?
#Question id: 7153
#Unit 5. Developmental Biology
What are osteoblasts?
#Question id: 7154
#Unit 5. Developmental Biology
Cancer is believed to often arise from stem cells, rather than fully differentiated cells. Which of the following are consistent with this view?
#Question id: 7155
#Unit 5. Developmental Biology
What does it tell us about aging that cells from different organisms are capable of a fixed number of divisions in culture, and that number of divisions reflects the relative life-span of the organism?
#Question id: 7156
#Unit 5. Developmental Biology
Which of the following is consistent with a model for aging in which stresses leading to DNA damage cause senescence and aging?
#Question id: 7157
#Unit 5. Developmental Biology
When the blastema forms after amputation of a newt limb, what processes must the cells undergo in order for regeneration to occur?