In an experiment, the independent variable
a.
always influences the dependent variable
b.
is the same for all groups in an experiment
c.
is influenced by the dependent variable
d.
is manipulated or varied by researchers

Option D

Explanation:

The scientific experiment is based on many steps. The factors on which the result of the experiment depends is the independent variable.

The independent variable can be defined as the factors that can be manipulated in order to get the accept the hypothesis or reject the hypothesis.

The result of the experiment can produce one or more than one result which is a dependent variable.

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.