Question

Which of the following mode of reproduction can be seen in archaea bacteria?
A. Sexual reproduction
B. Asexual reproduction
C. Horizontal reproduction
D. Both B and C

Answer 1

Hint: The domain of single-celled organisms is called archaea. These are prokaryotes that lack cell nuclei. They were initially classified as bacteria and hence derived the name archaea bacteria. Archaea are further classified as phyla.

Complete answer: The word asexual reproduction refers to the formation of offspring without the formation and fusion of gametes. Single-celled organisms like archaea bacteria reproduce asexually. Different types of asexual reproduction are budding, fission, vegetative propagation, spore formation, fragmentation, and agamogenesis. Sexual reproduction is a type of reproduction in which offspring are produced by the fusion of gametes. Single, primitive celled, prokaryotic organisms are called archaea bacteria. They possess one or more flagella which is used for the locomotion of the bacteria. Archaea bacteria usually lack cell walls and are similar to the gram-positive bacteria. Reproduction in archaea bacteria takes place by binary fission, budding, multiple fission, and fragmentation. Mitosis and meiosis do not occur in archaea bacteria. The cell cycle controls the cell division. Cell division takes place after the chromosome is replicated and two daughter chromosomes separate to form two different cells. Replication of chromosomes is done using DNA polymerase which begins from the multiple starting points. Archaebacteria do not produce from spores.
So, option B is the correct answer.

Note: Extremophiles were the first archaea bacteria to be observed which lived in extreme environments like hot springs and salt lakes. More energy resources are being used by archaea bacteria than eukaryotes. Sulfolobus genus shows characteristics that are similar to both bacteria and eukaryotic systems.