Lichens

Q.

What are the characteristics of ascomycetes?

Q.

What is the common asexual reproductive structure in penicillium?

Q.

Lichen is usually cited as an example of 'symbiosis' in plants where an algal and a fungal species live together for their mutual benefit. Whcih of the following will happen if algal and fungal partners are seperated from each other?

(a) Both will survive and grow normally and independent from each other.

(b) Both will die

(c) Algal component will survive while the fungal component will die.

(d) Fungal component will survive while algal partner will die.

Based on your answer how do you justify this association as symbiosis?

Q. Floral formula of tomato/tobacco is

1. 
2. 
3. 
4. 

Q.

Question 8

Association between mycobiont and phycobiont are found in

(a) mycorrhiza (b) root (c) lichens (d) BGA

Q.

Write an article on Effect of pollution on quality of life

Q.

What is the scientific name for lichens?

Q.

Lichens are well known combination of an alga and a fungus where fungus has :

1. A parasitic relationship with the alga

2. A symbiotic relationship with the alga

3. A saprophytic relationship with the alga

4. An epiphytic relationship with the alga

Q.

Why is the symbiosis of lichen called helotism?

Q. Which of the following organisms are not found in areas polluted with sulphur dioxide?

1. Green plants
2. Lichens
3. Blue green algae
4. Herbivores

Q. What kind of relationship is seen in lichens between the fungus and the alga?

1. Symbiosis
2. Predation
3. Competition
4. Parasitism

Q. Lichens are formed from organisms belonging to the Kingdoms:

1. Monera and Fungi
2. Mycota and Plantae
3. Plantae and Animalia
4. Both a and b

Q.

What is mycobiont example?

Q.

What is cephalodia?

Q. Why are diatoms called `jewels of the plant kingdom'?

Q. The major portion of lichen body is formed of

1. algae
2. fungus
3. blue green algae
4. bacteria

Q. A student was given a spore sample to observe under the microscope. He observed and found that the sample is the most common type of spore involved in asexual reproduction in algae. Identify the spore.

1. Endospore
2. Hypnospore
3. Exospore
4. Zoospore

Q.

Which group does bird’s nest fungi belong to?

Q. Component of lichen that absorbs minerals from the soil is called

1. Mycorrhiza
2. Phycobiont
3. Mycobiont
4. Haplobiontic

Q. There exists a close association between the alga and the fungus within a lichen. The fungus:

1. Provides protection, anchorage and absorption for the alga
2. Provides food for the alga
3. Fixes the atmospheric nitrogen for the alga
4. Releases oxygen for the alga

Q. A fern commonly inoculated to paddy fields is
A)Azolla
B)Marsilea
C)Salvinia
D)Anabaena

Q.

What is lichen used for?

Q.

What do the terms phycobiont and mycobiont signify?

Q.

Identify the incorrect statement about lichens____.

1. They show fungal and algal symbiotic relationship

2. They grow very rapidly (2 cm per day)

3. Some species are eaten by reindeers

4. They are pollution indicators.

Q. Lichens are

1. indicators of water pollution
2. capable of nitrogen fixation if they have cyanobacteria
3. symbiotic association between fungi and roots of higher plants
4. lichens are not found on rocks

Q. A moss plant is unable to complete its life-cycle in a dry environment. State two reasons. [2]

Q.

Some organisms are sensitive to different levels of air pollution and are used as pollution indicators. Suggest which among the following fits into the category

1. Fungi

2. Fresh water algae

3. Bacteria

4. Lichens

Q.

Name the group of organisms which have thallus body.

Q. Which type of interaction is seen in lichen?

1. Mutualism
2. Parasitism
3. Commensalism
4. Amensalism

Q. Which among the following is the reproductive structure in lichen?

1. Soredia
2. Asci
3. Basidia
4. Conidia