What is an endospore simple definition?
Endospore – A differentiated cell formed within cells of certain Gram-positive bacteria that are extremely resistant to heat and other harmful conditions and agents. Endopsore are the resting stage during the life cycle of some bacteria, formed in response to adverse conditions.
What are endospores quizlet?
Endospore. A resistant dormant structure formed by some Gram-positive bacteria. Endospores are highly resistant to. Heat, ultraviolet light, gamma radiation, disinfectants, and desiccation.
What is a bacterial spore definition?
A spore is a cell that certain fungi, plants (moss, ferns), and bacteria produce. Spores are involved in reproduction. Certain bacteria make spores as a way to defend themselves. Spores have thick walls. They can resist high temperatures, humidity, and other environmental conditions.
What are endospores for kids?
An endospore is a structure made by bacteria for survival purposes. Bacteria turn to endosporea when they undergo stress, such as an increase in heat or lack of nutrients. This process is known as sporulation.
What is the purpose of an endospore quizlet?
Terms in this set (8) A bacterial endospore is a structure formed within a bacterium that is resistant & dormant. The endospore’s purpose is to protect the bacterium from poor or unfavorable conditions that hinder its survival. Spores are also resistant to heat & chemicals that would otherwise kill other bacteria.
What is the difference between a spore and endospore?
The main difference between spore and endospore is that spore is an active reproductive structure mainly produced by plants and fungi whereas endospore is a dormant, non-reproductive structure of bacteria.
What is the function of an endospore quizlet?
What is an endospore made of?
The endospore consists of the bacterium’s DNA and part of its cytoplasm, surrounded by a very tough outer coating. Endospores can survive without nutrients. They are resistant to ultraviolet radiation, desiccation, high temperature, extreme freezing and chemical disinfectants.
What are 2 characteristics of spores?
In plants, spores are usually haploid and unicellular and are produced by meiosis in the sporangium of a diploid sporophyte. Under favourable conditions the spore can develop into a new organism using mitotic division, producing a multicellular gametophyte, which eventually goes on to produce gametes.
What is an endospore?
An endospore is a dormant, tough, and non-reproductive structure produced by some bacteria in the phylum Firmicutes. The name “endospore” is suggestive of a spore or seed-like form (endo means within), but it is not a true spore (i.e., not an offspring).It is a stripped-down, dormant form to which the bacterium can reduce itself.
Why are endospores so resistant to disease?
The resilience of an endospore can be explained in part by its unique cellular structure. The outer proteinaceous coat surrounding the spore provides much of the chemical and enzymatic resistance. Beneath the coat resides a very thick layer of specialized peptidoglycan called the cortex.
How do endospores maintain dormancy?
Dipicolinic acid is a spore-specific chemical that appears to help in the ability for endospores to maintain dormancy. This chemical accounts for up to 10% of the spore’s dry weight. Endospores can survive without nutrients.
What are the characteristics of endospore rupture?
It is commonly characterised by rupture or absorption of the spore coat, swelling of the endospore, an increase in metabolic activity, and loss of resistance to environmental stress.