F1 stands for first filial (daughter) generation
<span>F2 stands for second filial (daughter) generation</span>
A hypothesis Is when someone thinks of the answer and a theory is when a group of people think of an answer
answer is amount of mass in a certain volume
Answer: The Earth
This was believed to be true for hundreds of years....
Answer:
The fish did not yet exist when the old layers of rocks were deposited. In fact, animals with hard parts did not evolve until about 600 million years ago, which is only about 13% of the 4.5 billion year age of the Earth. Multicellular animals without hard parts left tracks in older sediments, but had no fossilize-able body parts.
Explanation: