The monomer must be able to form stable covalent chemical bonds between units in order to polymerize.
Answer:
Mutations can create entirely new alleles in a population which changes the allele frequencies of a gene pool.
Answer:
Due to presence at early days of the planet.
Explanation:
We only find the remains of single celled organisms in the oldest fossils because the single celled organisms are the organisms that were present in the early days of this planet. These single celled microbes were present about 3.7 billion years ago while on the other hand, the oldest rocks are only a little older i. e. 3.8 billion years so these single celled organisms are considered as oldest fossils on this planet.
He ability of a stream to erode and transport materials is largely based on its velocity.
