Hello,
The answer would be D.Pasteur set up an experiment with both open and sealed flasks, thus employing a control or standard of comparison.
Answer:
water pollution is a density independent factor because the more water that gets polluted the less fresh water we have
Explanation:
I used my BIG BRAIN
Answer:
B. an allele is a length of DNA with a specific sequence of nitrogen bases that make a protein that results in Hair or No Hair on the guinea pig
Explanation:
An organism that has two different alleles of the gene is called heterozygous. Phenotypes (the expressed characteristics) associated with a certain allele can sometimes be dominant or recessive, but often they are neither.
Two factors that influence the phenotype are: (1) the specific genetic information of the individual (its genotype), and (2) environmental influences on the expression of the individual's genetic potential.
