Wo sea urchin proteins were named cyclin a and b because, during the embryonic cell cycle, they were periodically
a. activated and inactivated by phosphorylation and dephosphorylation.
b. synthesized and degraded.
c. ubiquitylated and nonubiquitylated.
d. bound and released by another protein.

Which best describes meiosis? a. it produces cells that are identical to the original cell b. it is responsible for the replacement of damaged skin cells c. it is responsible for growth of the organism d. it produces male and female sex cells

15 ! come and answer! a(n) disease is caused by a pathogen and can spread among organisms. a infectious b noninfectious c toxic d contaminated

45 points how are people today being protected from tsunamis? earthquake data is analyzed to detemrine if a tsunami is likely, and if so, warnings are sent out. areas in tsunami risk zones are no longer heavily populated. radar is used to measure wave heights regularly. meteorologists study the winds to determine if wave heights will be large.