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biology exam paper corrections > fungi > Flashcards

fungi Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

nutrient added to the agar to enable the growth of leafy yeast in investigation

A

•malt

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2
Q

control in the investigation of growth of leaf yeast using agar played

A

•agar plate without a leaf

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3
Q

are fungi eukaryotic or prokaryotic

A

eukaryotic

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4
Q

how do parasitic fungi live

A

•eating a live host

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5
Q

facultative parasite

A

•fungi that can feed off a live or dead host

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6
Q

obligate parasites

A

•fungi that have to live off a live host

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7
Q

how does rhizopus feed

A

•releases enzymes into bread to digest it and then sucks up the nutrients

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8
Q

hypha

A

•grows into bread to absorb food

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9
Q

mycelium

A

•a group of hyphae together

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10
Q

rhizoids

A

•special hyphae that grow deep into the bread to absorb food

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11
Q

stolon

A

•a hypha that can move over the surface of the bread to help the fungus spread quicker

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12
Q

asexual reproduction in rhizopus

A
  1. Sporangiophores grow upwards
  2. tip of these tubes swells into sporangium
  3. cells in sporangium divide by mitosis to form spores
  4. sporangiophores dry out and spores blow away
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13
Q

sexual reproduction in rhizopus

A
  1. Plus & minus strain line up beside each other
  2. Nuclei from both hyphae move into swellings called progametangia
  3. Cross-walls form to produce gametangia
  4. walls of gametangia dissolve and no. of fertilisations occur producing diploid zygote nuclei
  5. zygospore forms around these nuclei
  6. When conditions suitable, zygospore germinates by meiosis
  7. hypha grows out of zygospore & produces a sporangium at tip
  8. sporangium opens releasing many haploid spores which grow
    into new individuals
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14
Q

is yeast multi or uni cellular

A

unicellular

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15
Q

yeast usage

A

•make beer

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16
Q

asexual reproduction of yeast

A

•budding

17
Q

advantages of fungi

A

•fungi can be used to make beer and we can eat them

18
Q

disadvantages of fungi

A

•can cause diseases like athletes foot and cause food to go off

19
Q

what trees have a special type of yeast growing on the underside of their leaves

A

•sycamore

20
Q

to grow fungi, you stick leaf into pétri dish and allow spores to fall onto

A

•nutrient agar

21
Q

what does agar do

A

•makes water solid so you can see what’s growing on top

22
Q

why is it called nutrient agar

A

•as it has food for yeast/bacteria

23
Q

method of aseptic conditions

A

•wash hands
•don’t open lid of plate for too long

24
Q

method of sterile conditions

A

•pass apparatus through flame of bunsen burner

25
Q

what should yeast look like

A

•grow in shape of leaf and in pink circles

26
Q

why more yeast on leaves in countryside

A

•yeast don’t like pollution

27
Q

what feature of a zygospore aids survival

A

•thick wall

28
Q

correct disposal method for plates

A

•soak in disinfectant

29
Q

how did you store the plates until the yeasts were visible

A

•upside down in incubator at 25 degrees for 2-7 days

30
Q

why is the genetic make up of cell and parent cell in yeast in asexual reproduction identical

A

•reproduced by mitosis

31
Q

advantages of budding

A

•characteristics maintained

32
Q

disadvantages of budding

A

•increased risk of disease

33
Q

how introduce yeast into pétri dishes

A

attatch leaves to inside of lid

34
Q

differences between fungi and plantae

A

•fungi have cell wall of chitin/plantae have cell wall of cellulose
•fungi have no chloroplasts/plantae have chlorplasts

35
Q

method of asexual reproduction in rhizopus name

A

•sporulation

36
Q

purpose of control in this yeast experiment

A

•to show that the yeast came from the leaf and not from agar

37
Q

benefits of zygospores

A

•can survive drought
•dispersal

38
Q

what happens to new cells formed in budding in yeast

A

•forms a colony

39
Q

how does asexual reproduction in rhizopus differ from than in yeast

A

•rhizopus produce spores

biology exam paper corrections (20 decks)

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