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Fungal Parasites and Plant Infection

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Questions and Answers

What triggers the change in form of some fungi that cause human infections?

Change in light intensity

Change in CO2 concentration

Change in nutrient availability

Change in temperature (correct)

How do fungi obtain their nutrients?

Through photosynthesis

By producing their own food through cellular respiration

By absorbing nutrients directly from outside their bodies (correct)

By ingesting food and then digesting it internally

What is a saprotroph?

An organism that lives in or on another living organism

An organism that obtains its food from dead and decaying matter (correct)

An organism that has a symbiotic relationship with another organism

An organism that produces its own food through photosynthesis

What is the term for a parasite that can only survive and grow in living cells?

Biotroph Signup and view all the answers

How do fungi digest their food?

Externally using extracellular enzymes Signup and view all the answers

What is the mode of nutrition in fungi?

Heterotrophic Signup and view all the answers

What type of fungi can infect their host and bring about its death, and then live saprotrophically on the remains?

Necrotrophs Signup and view all the answers

How do fungal hyphae penetrate plant hosts?

All of the above Signup and view all the answers

What enzymes do fungi produce to digest the middle lamellae of cell walls?

Pectinases Signup and view all the answers

What specialized structure do obligate parasites possess to aid in penetration and absorption?

Haustoria Signup and view all the answers

What type of symbiotic association is formed between fungi and algae?

Lichens Signup and view all the answers

What is the term for the symbiotic association between a fungus and the roots of higher plants?

Mycorrhizae Signup and view all the answers

What is the term used to describe the body or vegetative structure of a fungus?

Thallus Signup and view all the answers

What is the term used to describe fungi that have hyphae with cross walls or septa separating cells?

Septate Signup and view all the answers

What is the term used to describe fungi that can exist in two distinct forms?

Dimorphic Signup and view all the answers

What is the mode of reproduction in yeasts?

Budding and transverse fission Signup and view all the answers

What is the result of fungal degradation on certain materials?

Destruction of materials of economic importance Signup and view all the answers

What is the impact of fungi on human health and crops?

Fungi cause significant damage to crops and also cause human diseases Signup and view all the answers