Pyrimidines are single-ringed nitrogenous bases that include Uracil, Cytosine, and Thymine.
If any of these three nitrogen bases are part of the multiple choice, then it should be the answer. I just took the test and for me it was Thymine.
What happens when you mop the ocean and fold the dishes?
A confounding variable refers to an external effect, which modifies the influence of an independent and dependent variable. This extraneous effect is used to affect the outcome of an experimental design. The confounding variables can ruin the experiment and can generate unnecessary outcomes.
In the given case, confounding variables can be introduced by testing multiple hypotheses at a time and by using distinct kinds of soil in each of the samples.
Scientific knowledge is durable and robust, but open to change.
Hope this helps
1) type of cell in which the tissue is made of
2) shape
3) number of layers of cells