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Fungi
test questions
47
Science
6th Grade
01/14/2008

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Term
Are fungi multicellular or unicellular?
Definition
Most are multicellular but some may be unicellular
Term

what are hyphae?

Definition
thread like tubes that make up a fungus
Term
How are fungi cells different from plant and animal cells?
Definition
Fungi have multiple nuclei, much cytoplasm and do not have a cell membrane
Term
Why can substances move easily through a fungus?
Definition
fungi do not have cell membranes to keep substances in or out, and there is a lot of cytoplasm making it easy for substance to flow
Term
What are cross walls?
Definition
incomplete cell wall, they separate hyphae into compartments
Term
What is the most common single celled fungus?
Definition
Yeast
Term
What do fungi use to reproduce?
Definition
spores
Term
What are spores?
Definition
a reproductive cell of fungi surrounded by a protective cell wall
Term
How are spores dispersed?
Definition
They are small and lightweight so they are easily carried along by the wind
Term

What is a fruiting body?

Definition
structure that makes and stores spores
Term
Describe a simple fruiting body
Definition
cluster of spores on a stalk
Term
How many spores could be in a single fruiting body?
Definition
trillions
Term
Why aren't we surrounded by millions of mushrooms and puffballs?
Definition
Most do not find the right conditions to grow, and most that do grow do not survive to be able to product spores of their own
Term
Why do fungi produce large numbers of spores?
Definition
so the possibility of at least some of them growing is increased
Term
What are mushrooms shaped liked?
Definition
umbrellas
Term

What are the main parts of the mushroom?

Definition
cap gills, stalk, ring, rhizoids, spores
Term
How do mushrooms reproduce?
Definition
they give off spores
Term
What do yeast cells look like?
Definition
they are round and all are unicellular
Term
How do yeast reproduce?
Definition
budding
Term
What conditions are necessary for yeast to live and reproduce?
Definition
warmth, moisture, food
Term
What gas do yeast produce?
Definition
carbon dioxide
Term

Explain how yeast are able to make bread rise

Definition
bread dough is perfect conditions, yeast reproduce quickly and make carbon dioxide
Term
What does mold look like?
Definition
flat, fluzzy shapeless
Term
How did people centuries ago help their wounds heal?
Definition
put decayed cheese, fruit and  bread into the wounds
Term
Who discovsered penicillin and when?
Definition
Sir alexander fleming in 1928
Term
What are some fods that are made of mold?
Definition
tofu, blue cheese, soy sauce
Term
Why do farmers and gardeners spend millions of dollars each year on fungicide?
Definition
to protect their plants from potential fungal diseases that can make them inedible or kill them
Term
Describe aflatoxin
Definition
powerful cancer-causing substance, can cause liver cancer to be fatal, grows on stored grain
Term
Why is it important to dry crops such as peanuts or corn before they are stored?
Definition
to remove the moisture that allows or encourages fungi to grown on the crops
Term
What is ergot?
Definition
fungus that areplaces grainsof rye with hard spiky poisonous growths
Term
Describe the effects of ergot on humans
Definition
burning or prickling sensations, hallucinations, convulsions, cuts off flow of blood to limbs
Term
What is the connection between ergot and the Salem witch trials?
Definition
historians think people were afraid of the strange sysptoms of ergot and thought the infected women were witches
Term
How can fungi diseases help humans?
Definition
can kills pests - gypsy moth caterpillars, mites, aphids
Term
What does mychorrikizae mean?
Definition
Greek for fungus roots
Term
What are two ways mychorrhizae attach to roots of plants?
Definition
cover surface of root, or send hyphae into the rots cells
Term
How do these fungi help the plants?
Definition
increase ost's ability to gather nurtients by 10x or more, protect against drought, cold, acid raid and root diseases caused by hamful fungi
Term
What are australian researchers trying to do with these mychorrihizae?
Definition
alter the hereditary material to produce natural insecticides
Term

How many organisms make a lichen?

Definition
two
Term
What is a lichen made of?
Definition
fungus and algae
Term
What is algae?
Definition
a simple plantlike autotroph that uses sunlight to make its food
Term
What does the fungus part provide for the lichen?
Definition
water and minerals absorbed fromwhatever the fungus is growing on
Term
What does the algae part procide for the lichen?
Definition
uses the minerals and water to make food for the algae and itself
Term
Why is the relationship between alga and fungus considered to be one of the best examples of symbiosis?
Definition
two organisms live in a relationship with each other and both benefits
Term
Why are lichens called pioneers?
Definition
they are often the first living things to appear in rocky, barren areas.  They release acids that cause rock to break down and crack.
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