Answer:
They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth. Later, scientists used absolute dating to determine the actual number of years ago that events happened. The geologic time scale is divided into eons, eras, periods, and epochs.
Explanation:
36 is the answer to this frank rfnfrntfhdurujhdbrdgdhurdbdhrdbdrhy b rd rd Fred Fred Fr
Answer;
D. controlled
An experiment in which only one variable is changed is a controlled experiment.
Explanation;
-A control experiment is an experiment where the researcher only changes one variable at a time in order to isolate the results.
In a controlled experiment, most conditions are constrained so that they do not change. One or two other conditions are then changed and measured by the experimenter. These are known as the independent variables.
For example; An experiment where all subjects involved in the experiment are treated exactly the same except for one deviation.
The answer is meiosis. meiosis is the process that is responsible for the independent assortment of alleles. the role of this process is to separate the chromosomes and it's alleles. thus process is required to produce egg and sperm cell for sexual reproduction.
