Home
Class 12
BIOLOGY
A : Phycobiont is dominant parent in lic...

A : Phycobiont is dominant parent in lichens.
R : Algal component in the dual organisms can be eukaryotic only.

A

If both assertion & reason are true and the reason is the correct explanation of the assertion

B

If both assertion & reason are true but the reason is not the correct explanation of the assertion

C

If assertion is true statement but reason is false

D

If both assertion and reason are false statements

Text Solution

AI Generated Solution

The correct Answer is:
To analyze the statements regarding lichens, we will break down each part of the question step by step. ### Step-by-Step Solution: 1. **Understanding Lichens**: - Lichens are symbiotic associations between fungi and algae (or cyanobacteria). In this relationship, both partners benefit from each other, which is known as mutualism. 2. **Identifying the Components**: - The algal component of lichens is referred to as the phycobiont. This is the part of the lichen that performs photosynthesis and provides nutrients to the fungal partner. 3. **Evaluating Statement A**: - The statement claims that "phycobiont is the dominant parent in lichens." - In reality, while the phycobiont (algal component) is crucial for the survival of the lichen, it is the fungal partner that is often considered the dominant partner because it provides the structure and habitat for the algal cells. Therefore, this statement is **false**. 4. **Evaluating Statement R**: - The statement claims that "the algal component in the dual organisms can be eukaryotic only." - While many lichens have eukaryotic algae (like those from the group Chlorophyceae), some lichens can also have cyanobacteria as their algal component. Cyanobacteria belong to the kingdom Monera and are prokaryotic. Thus, this statement is also **false**. 5. **Conclusion**: - Both statements A and R are false. The phycobiont is not the dominant parent in lichens, and the algal component can be prokaryotic (as in the case of cyanobacteria) as well as eukaryotic. ### Final Answer: Both Assertion (A) and Reason (R) are false. ---
Promotional Banner

Topper's Solved these Questions

  • BIOLOGICAL CLASSIFICATION

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (Section - C) (Previous Years Questions)|128 Videos

  • BIODIVERSITY AND CONSERVATION

    AAKASH INSTITUTE ENGLISH|Exercise SECTION - D (Assertion-Reason Type Questions)|10 Videos

  • BIOMOLECULES

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (SECTION-D) Assertion-Reason Type Questions|10 Videos

Similar Questions

Explore conceptually related problems

Algal component in a lichen

Minor structural component in lichen body is/can :

In lichens, the algal component is known as (A)____ and the fungal component as (B)_____

[A] : Living organisms are like a close system . [R] : Energy in the organisms neither can be lost nor gained from the another environment .

In three kingdom classification, the kingdom Protista includes (a) Unicellular eukaryotic organisms only (b) Unicellular prokaryotic organisms only (c) Wide variety of unicellular, mostly aquatic eukaryotes (d) Wide variety of unicellular, mostly terrestrial Prokaryotes

In the following questions , a statement of assertion (A) is followed by a statement of reason (R). Br A: Haploids are better for mutation experimental studies. R: All mutations either dominant or recessive can express immediately in them.

[A] : Lichens are composite organisms . [R] : The fungal component in Basidiolichens belong to Basidiomycetes and algal component of association is either a green alga or myxophycean member .

Lichens are small group of curious plants, whose body is made up of an algal and a fungal components, both of which live together in an intimate relationship. Both algal and fungal partners are benefited by the association. What will happen if algal and fungal partners are separated from each other?

Read the following statement and state them as True (T) or False (F) (1) Abundance of lichens in any area indicates that the area is highly SO2 polluted. (2) Mycobiont partner of lichens is always heterotrophic. (3) Body of lichens is made up of phycobionts only.

A: Disarmed Ti plasmid can be utilised as a shuttle vector. R: It can survive in both prokaryotic and eukaryotic organisms.