Tumor progression by clonal expansion is based on the idea that the original population of cancer cells is subjected to ________ selection
Fill in the blank with correct word.
Answer: Darwinian
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How does DDT in the environment affect many birds?
A. stunted growth of chicks B. chronic liver failure in adults C. advancing neurological degeneration D. decreased reproductive rate
Rasheed suffers from terrible migraine headaches. They are likely caused by
A) at least three genes and perhaps environmental triggers, such as foods. B) a single gene but no environmental influences. C) a missing chromosome. D) poor diet and susceptibility to infection.
Which of the following statements about fungi is true?
a. All are prokaryotic. b. All are multicellular. c. All require organic material for growth. d. All grow using sunlight and carbon dioxide. e. All are plants.
In which growth phase is there no increase or decrease in cell number because some cells are dividing while others are dying?
a. death phase b. exponential phase c. lag phase d. stationary phase