Answer: The correct options are
--> Disinfectants are used to inhibit or destroy pathogens,
--> Disinfection can occur by physical or chemical means,
--> Endospores and viruses can resist disinfectant treatment.
Explanation:
To prevent infectious diseases from spreading or to sterilise work area surfaces during the production of drugs, chemicals known as disinfectants as used. These are chemicals that kill or inhibit the growth of pathogens. Other chemicals such as antiseptics can also kill and prevent the growth of mainly pathogenic microorganisms. However, disinfectants are stronger chemicals than antiseptics and so are often used on non-living things and surfaces.
Disinfection does not necessarily kill all microorganisms, especially resistant bacterial spores (endospores) and viruses, so it is less effective than sterilisation.
There are generally two methods of disinfection:
--> The chemical method: A typical example of a chemical disinfectant is the carbolic acid. It is used for disinfecting lavatories and floors.
--> The physical method: here, physical agents are use to disrupt and damage the pathogenic organisms on work surfaces. Some typical example include: UV irradiation, heat, sunlight exposure, sonic or hydrodynamic pressure and radiation.
Answer:
the amount of genetic variation in a population.
Explanation:
The proportion of the members of a population possessing beneficial allele due to natural selection will increase with time while the proportion of those possessing a harmful allele will decrease with time. After many generations, all the members carrying the harmful allele will die out leaving only those with the beneficial allele. The result is a genetic variation of the population with time.
Qualities that have nothing to do with genetics are dependent on an organism's environment and the organism's genetics do not play a role in determining them. For example, if a person's finger is cut off, this is a trait that is independent of genetics. The loss of a finger will not be inherited into the organism's offspring.
Traits that are dependent on genetics are those such as eye color and height.
Hello there,
<span>Euglenas are protists, so they are eukaryotes.
</span>Euglena is classified as eukaryotic organism because some of its cell organelles are clearly defined, that is, they are surrounded by membranes.
Hope this helps :))
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