Which of the following is the best definition of generation time?
a) the length of time needed for lag phase b) the length of time needed for a cell to divide c) the minimum rate of doubling d) the duration of log phase e) the time needed for nuclear division

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex

the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers