why are current radiation and chemotherapy treatments not always effective in preventing the reoccurrence of cancer?

Cytophaga can digest cellulose into glucose for the cell to use an energy source to make atp and as a carbon source. select one: a. True b. False

What is another name for haploid and diploid cells?

Cells have differences and similarities. How is a human sperm cell different from most other cells (i. e. simple squamous cell, a red blood cell and a smooth muscle cell) ?

In which location would you expect the oxygen concentration to be the lowest?

If you needed information on the relationships between predators and prey, you would consult a a. food web b. food network c. food tree d. food chain

Which type of cytoskeletal element is described as a solid

Energy related usage in the United States makes up nearly what percentage of human-caused greenhouse emissions? A 57% B 63% C 72% D 85%

One function of the chromosomes in a cell is to A. absorb light and create energy for the entire organism. B. transport proteins throughout the cell and to other cells in the body. C. provide a location for protein synthesis inside the cell. D.

Consider the Ras signal-transduction pathway. Suppose a mutation occurred in the gene that encodes the transmembrane receptor to which a growth factor binds. The mutation no longer allows the growth factor to bind to the receptor.

Which of these have prokaryotic cells? A. snails B. bacteria C. frogs D. food