Question

1. Are all prokaryotes harmful? Explain your answer.

2. In what types of environments are prokaryotes found?

3. List the types of symbiosis and explain how each population is affected.

4. How do you determine if bacteria are gram positive or gram negative?

Answer 1

1)Eventhough many of them causes disease,they are beneficial too...bacterias are used in fermentation processes such as brewing,baking, and cheese and butter manufacturing.They are also used in agriculture.

2)Prokaryotes live in nearly all environments on Earth. Some bacteria are extremophiles, thriving in harsh conditions, such as high temperatures (thermophiles) or high salinity (halophiles).

3)Mutualism-bacteria and archaea living in the gut of animals have mutualistic relationship with their host.

Parasitism-cases in which bacteria act as pathogen in humans.parsite having long term benefits.

Commensalism-one having benefits and other is neither benefited nor harmed.

Lichens-a symbiotic relationship between photosynthetic organism and a fungus.

4)By doing Gram staining process- Gram positive bactria appear purple in colour due to thick peptidoglycan membrane which can hold the dye.Gram negative bacteria have pink colour.