Answer: The answer should be D .
Explanation:
Introduced species can harm our planet because in some regions of the world we are not prepared for their type of species, which can all in all cause damage.
It is in standard notation
in scientific notation it would be is 5.4 x 10^6
Fungal hyphae extend continuously at their extreme tips, where enzymes are released into the environment and where new wall materials are synthesised. ... So, in effect, a fungal hypha is a continuously moving mass of protoplasm in a continuously extending tube.
Mutations result either from errors in DNA replication or from the damaging effects of mutagens, such as chemicals and radiation, which react with DNA and change the structures of individual nucleotides. All cells possess DNA-repair enzymes that attempt to minimize the number of mutations that occur