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F5 Biology C8: Biodiversity > The Role of microorganisms > Flashcards

Flashcards in The Role of microorganisms Deck (11)
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1

State how many roles do microorganisms possess?

*hint: 4 ways

- producers
-decomposers
- parasites
- symbionts

2

What examples of microorganisms are producers?
What makes them producers?

-phytoplankton
- they have chloroplast hence they can produce energy through photosynthesis

3

What are the decomposers that decomposes dead organisms?

- Saprophytic bacteria
- saprophytic fungi

4

Why is decomposers important to the environment?

- Decomposers break down complex organic substance to simple compounds, ammonium

- Ammonium will then be absorbed by the soil

5

What is the relationship of organisms when the host is harmed and another organisms gets the benefit ?

Give example of organisms having this relationship.

- parasitism
- Plasmodium sp., a protozoa that lives inside the female mosquito transmits Malaria to anyone who is bitten by the mosquito

6

What is the definition of symbiont?

A symbiont is when an organism has a close relationship with the host.

7

How many types of symbiont relationships we can classify? Name them and state their differences.

- 2types of symbionts

Ectosymbiont
- Lives outside host
- Commentialism
- Exp: Ectomycorrhiza(fungi) absorb nutrients from soil while not harming host

Endosymbiont
- Live inside host
- mutualism
- Exp: Protozoa that live inside alimentary canal of termites
- secretes enzyme to break down cellulose in wood to simple sugar for termites. Termites provide shelter and food.

8

What are pathogens and vectors? State their definition.

Pathogens: Organisms that can cause disease
(fungi, bacteria, virus, protozoa)

Vectors: Organisms that transmits pathogens

9

State some examples of pathogens.

Dengue virus is transmitted to humans through Aedes mosquito bites

Vibrio cholerae is spread to humans through flies

10

What happens when pathogen enter your body?

- pathogen damages cell so they can divide and multiply

11

Pathogens can disrupt your immune system in many ways

State the pathogens (virus, protozoa, bacteria and fungi)

Virus- Hepatitis B (Inflammation, swollen chest)
Protozoa- Dysentery (Vomit)
Bacteria- Tuberculosis (Coughing blood)
Fungsi- Tinea versicolour ( Whitish and pinkish patch on skin)