Answer:
More Information
Explanation:
New things are found over time, thus changing knowledge.
Answer:
D. It provides a way to increase the
frequency of beneficial traits in a
population.
Explanation:
Artificial selection is a selection made by the human intervention. Artificial selection is better than natural selection because in natural selection organisms mate naturally with each other while in artificial selection, human selects good traits organisms to mate with each other and produce offspring which has better characteristics than parents.
Answer:
The correct answer is a. Helicase unwinds DNA
Explanation:
DNA replication is a process in which DNA make it's own copy. There are several enzymes and factors which access the DNA replication process like helicase, primase, SSB protein, DNA polymerase etc.
The first step in DNA replication is the unwinding of double stranded DNA which is accomplished by an enzyme called Helicase. Helicase opens up the double stranded DNA at replication fork by breaking the hydrogen bond between the nucleotides of complementary strands.
This provides a single stranded template for DNA polymerase to form a new complementary strand. In <em>E. coli </em>Dna B is the primary helicase and in humans the primary helicase is MCM( minichromosome maintenance protein complex).
