Video Transcript
By what method do organisms
belonging to kingdom Archaebacteria and Eubacteria commonly reproduce? (A) Production of spores, (B)
binary fission, (C) mitosis, (D) meiosis.
Organisms reproduce in many
ways. Let’s go through the answer choices
to see if they describe a method of reproduction that applies to Archaebacteria and
Eubacteria.
Mitosis is a type of cell division
where one cell divides to produce two new cells that are genetically identical. During mitosis, chromosomes are
replicated and separated within a nucleus before being split into two to form new
cells. Archaebacteria and Eubacteria are
both prokaryotes which lack a nucleus. So we know that they do not use
mitosis as a method for reproduction. Therefore, we can eliminate this
answer choice.
Meiosis is a type of cell division
where one cell can produce four genetically different cells with half the number of
chromosomes. It is a specialized form of cell
division that produces gametes, or sex cells, such as egg and sperm cells. Prokaryotic organisms do not
undergo meiosis, so we can eliminate answer choice (D) also.
Similarly, production of spores can
involve meiosis and is exclusively used by some eukaryotic organisms to
reproduce. So answer choice (A) is also
incorrect.
During binary fission, the parent
cell replicates its DNA, which is then divided into two new cells. This is the primary method of
reproduction among prokaryotic organisms, such as Archaebacteria and Eubacteria.
Therefore, the option that
correctly identifies the method of reproduction by Archaebacteria and Eubacteria is
given by answer choice (B), binary fission.
