Answer: a. During DNA replication, enzymes unwind DNA to provide a template for making identical DNA strands.
Explanation: The purpose of DNA replication is to produce genetically identical DNA molecules.
Replication is the process of copying a double-stranded DNA molecule into two identical daughter DNA. The enzyme known as helicase unwinds the DNA so that each strand will serve as a template for the synthesis of a complementary DNA strand. The. Two identical daughter DNA produced each contains one parent DNA strand and one new complementary strand.
Answer:
The process of producing food, feed, fiber and many other desired products by the cultivation of certain plants and raising of domestic animals. Agriculture was the key development in the rise of sedentary human civilization.
Explanation:
Mutations are positive occasionally, beneficial occasionally and omission of information.
Answer: Options 1, 3 and 4.
<u>Explanation:</u>
Mutations are more or less permanent changes. These changes are heritable in the phenotype of an individual. These changes occur because of the alteration in the number, kind or the sequence of nucleotide of the genetic material which is DNA in most of the cases.
Mutations occur at some times in the life of people and they are present in only some cells of the human body. They are not present in all the cells of the human body. These changes can also occur because of environmental factors like ultraviolet radiation from the sun.
