I would have to say d.Please let me know if i am right.
Answer:
The treatment generally consists of the independent variable, which is the variable that is being manipulated by the experimenter, and the dependent variable, which is observed or measured to see if it is responding to the independent variable.
BRAINLIST PLEASE
An epoch is longer than an era.
Answer:
mark as brainiest please
Explanation:
Agricultural Activities
mining
urbanisation
illegal longing
forest fires
Natural causes as hurricanes, fires, parasites and floods.
Unlike natural selection, genetic drift does not depend on an allele's beneficial or harmful effects. Instead, drift changes allele frequencies purely by chance, as random subsets of individuals (and the gametes of those individuals) are sampled to produce the next generation.