F1 stands for first filial (daughter) generation
<span>F2 stands for second filial (daughter) generation</span>
They analyze the sequence of bases in the DNA to determine who committed a crime.
Salutations!
A group of cells working together are called tissues. Organisms are made up of this structure. Cells are the smallest unit of life. A group of tissues working together is called organ. A group of organs working together is called organ system. An organ system working together makes up an organism.
Hope I helped (:
Have a great day!
<h2>
Answer:</h2>
<h3>1. Hepatitis B </h3><h3>2. Levels of circulating antibodies against a certain antigen.</h3>
<h2>
Explanation:</h2>
<h3>Hope its help</h3>