The first known single-celled organisms appeared on Earth about 3.5 billion years ago, roughly a billion years after Earth formed. More complex forms of life took longer to evolve, with the first multicellular animals not appearing until about 600 million years ago.
Answer:
100%
Explanation:
Because one of the roses is purebred dominant, all recessive genes will be overshadowed.
Answer:
Uracil
Explanation:
DNA only uses Thymine so that leaves Uracil for RNA because all of the other bases are used for both.
The answer is B. The oak tree. Autotrophs make their own food.
