Fungi

Question 1

What are the features of fungi?

Answer 1

They are hetrotophic
Most of them have to be multicelular
They are made up of threads called hyphae
Their walls are made of a carbohydrate called chitin

Question 2

What are the two tipes of Nutrition in fungi?

Answer 2

Saprophytic

Parasitic

Question 3

What are the characteristics of Saprophytic?

Answer 3

Most fungi are Saprophitic
They obtain food from a dead material
As they digest it, materials are realeased and recycle
They plaly a vital role inn the enviroment as they are responsable for decay

Question 4

What´s an example of a Saprophytic?

Answer 4

Mushrooms and moulds

Question 5

What are the characteristics of Parasitic?

Answer 5

Absorb their food from live host
Cause harm
Get food from plants and animals

Question 6

What’s an example of a parasitic?

Answer 6

Athlete’s foot

Question 7

symbiotis relationships in fungi

Answer 7

Lichin=fungi+algae

Question 8

edible and poisonous fungi

Answer 8

some are edible

most are poisonous

Question 9

Example poisonous fungi

Answer 9

rhizoids

Question 10

sporangium

Answer 10

capsule struture

produces the spores by mitosis

Question 11

Columella

Answer 11

top of the sporangiophoreç

it holds the sporangia in place

Question 12

stolon

Answer 12

Hypha grow on the surface of the bread

Question 13

hypha

Answer 13

thread structures
no cross walls
contain many haploid nucleic.

Question 14

Rhizoid

Answer 14

hyphae that grow into the bread

anchor fungus and digest starch by secreting enzymes

Question 15

How does fungi reproduces?

Answer 15

It reproduces by spores.

Question 16

What is the role of sporangiophores in asexual reproduction of fungi?

Answer 16

Sporangiophores grow up from the stolon on the substrate after a number of days

Cells within the sporangium divide by mitosis to produce spores. (haploid)

Question 17

What’s the role of the sporangium in the asexual reproduction in fungi?

Answer 17

To dry out in the right conditions and to open releasing the spores produced by the sporangiophore.

Question 18

What happen to the spores that are now outside of the sporangium?

Answer 18

They will grow into a new hypha and mycelium if it lands on a suitable substrate.

Question 19

How can fungi reproduces sexually?

Answer 19

Only when two opposite strains join together.

Question 20

When two opposite strains join…

Answer 20

…swellings grow on both strains

Question 21

When nuclei and cytoplams join is called:

Answer 21

Progametangia

Question 22

Cross walls form in the tip of each to produce…

Answer 22

…gametangia

Question 23

The walls of the gametangia…

Answer 23

…dissolve and fertilisations take place producing diploid zygote nuclei.

Question 24

When is a zygote nuclei form?

Answer 24

In the sexual reproduction of fungi.

When the walls of the gametangia dissolve and fertilisations take place producing it.

Then, a zygospore is form around it.

Question 25

When conditions are suitable…

Answer 25

…the zygospore germinates by meiosis.

Question 26

What grows out of the zygospore when it reaches a substrate? and what does it produce?

Answer 26

A haploid hypha and it produces a sporangium at the tip.

Question 27

What’s the difference btw mitosis and mieosis?

Answer 27

mitosis: divided in 2s
mieosis: divided in 4s

Question 28

What are the characteristics of yeast?

Answer 28

Unicellular
Cell wall made of chatin
Eukaryotic
Has many food vacuoles
It respire anaerobically (without oxygen)
It is use to produce carbón dioxide and alcohol.

Question 29

What are the parts of a yeast cell?

Answer 29

Food vacuole
Cell Wall
Vacuole
Nucleus
Cytoplasm

Question 30

How does the yeast reproduce?

Answer 30

By budding.

Question 31

The nucleus of the parent yeast cell divides by….

Answer 31

…mitosis.

Question 32

One of the daughter nuclei…

Answer 32

…enters a small developing bud on the outside of the yeast cell.
This bud can separate becoming a new cell or develop a long yeast colony.

Question 33

What’s the economic importance of fungi for food?

Answer 33

Yeast can be use to make bread and alcohols.
Fungi as a source of food.
Fungi can attack crops and may cause major financial looses.
Fungi can infect animals or spoil food.

Question 34

An example of fungi as a food source

Answer 34

Mushrooms

Question 35

An example of fungi attacking crops

Answer 35

Potatoe blight

Question 36

What’s an example of a fungi that can spoil food?

Answer 36

Rhizopus

Question 37

What are the phases of two opposite strains in sexul reproduction?

Answer 37

Opposite strains
Nucleus + Mitochondria= Progametangium
Gametangia
Zygote
Zygospore
   dormant
   germinates
Hypha
Sporangium
Spores