Which of the following statements about the first scuba diving suit is true?

a. it weighed about 100 pounds

b. it was made in the 1950's

c. it weighed about 50
pounds

d. it was made in the 1870's

not only is it colder, it also becomes darker, less salty, and more dense.

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.