Cells that lack a membrane-bound nucleus are called prokaryotes (from the Greek meaning before nuclei). These cells have few internal structures that are distinguishable under a microscope. Cells in the monera kingdom such as bacteria and cyanobacteria (also known as blue-green algae) are prokaryotes.
Prokaryotic cells differ significantly from eukaryotic cells. They don't have a membrane-bound nucleus and instead of having chromosomal DNA, their genetic information is in a circular loop called a plasmid. Bacterial cells are very small, roughly the size of an animal mitochondrion (about 1-2µm in diameter and 10 µm long). Prokaryotic cells feature three major shapes: rod shaped, spherical, and spiral. Instead of going through elaborate replication processes like eukaryotes, bacterial cells divide by binary fission.
Diagram of a prokaryotic cell. Notice the internal organelles are not easily distinguishable.
Bacteria perform many important functions on earth. They serve as decomposers, agents of fermentation, and play an important role in our own digestive system. Also, bacteria are involved in many nutrient cycles such as the nitrogen cycle, which restores nitrate into the soil for plants. Unlike eukaryotic cells that depend on oxygen for their metabolism, prokaryotic cells enjoy a diverse array of metabolic functions. For example, some bacteria use sulfur instead of oxygen in their metabolism.They are usually very small in size as compared to eukaryotic celles
Prokaryotic cells lack a membrane-bound nucleus. Some of their characteristics include: the lack of organelles, cell walls are composed of peptidoglycan and they contain only one circular strand of DNA .
the dploid zygote usually undergoes meiosis.producing sexual
A spirochete (also spelt as Spirochaete) is Prokaryotic.
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prokaryotic
eukaryotes
A prokaryote is a group of organisms that have similar characteristics. Prokaryotic is the adjective to prokaryote. For example, "the prokaryotic cell" means the same as "the prokaryote".
Most prokaryotic cells, unlike eukaryotic cells, have a string of DNA inside them instead of a nucleus.
Prokaryotic and heterotrophic/autotrophic depending on the species.
—Prokaryotic cells lack a nucleus. —Prokaryotic cells tend to lack other membrane-bound organelles. (the nucleus, itself, also represents a membrane-bound organelle)
Prokaryotic and eukaryotic
Prokaryotes do not have a membrane-bound nucleus or other membrane-bound organelles.
Prokaryotic cells have no nucleus, they are only a bacteria cell, and they have circular DNA.
One of a prokaryotic cell's characteristics is that it has no nucleus. So you could say that it is a prokaryotic cell because it has no nucleus. My 6th grade science teacher once told me: Pro= no (prokaryotic has no nucleus) Euk = nuc (eukaryotic cells have nucleus). This answer only applies if the kind of bacteria you are talking about is prokaryotic.
No nucleusSmaller than most eukaryoticHas ribosomesHas membraneNo membrane-bound organellesunicellular
The characteristics of the kingdom archaea include being unicellular and prokaryotic cells. They are normally found in very harsh conditions unfit for larger organisms.
One of the characteristics of the archaea bacteria is that its cell wall is without peptidoglycan. They can live in environments without oxygen. They are also prokaryotic, unicellular, and they reproduce asexually.
1.) Has a nucleus. 2.) Larger than most Prokaryotic. 3.) Has a membrane. 4.) Has ribosomes.