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Right ANSWER is (c) rigid cell wall they have

For explanation I WOULD say: Archaebacteria have a rigid cell wall which helps them to SURVIVE in extreme conditions LIKE high salt concentration (halophiles) and very high temperature (thermophiles).

Correct answer is (a) It has RIGID cell wall

To EXPLAIN: Mycoplasma has no cell wall. It is parasite and is present in urogenital tract and blood smears. They are the SMALLEST living cells and are capable of causing DISEASES.

Right answer is (a) Obligative symbiosis

Easy EXPLANATION: In obligative symbiosis, both the organisms get benefitted and this symbiosis is necessary for both of their SURVIVAL. Symbiotic RELATIONSHIP between HONEY bee and flowers is necessary for their survival because honey BEES needs nectar from flowers and in turn help flowers with pollination.

Right choice is (B) False

The explanation is: All FUNGI are multi-cellular except yeast. Yeast is the only unicellular fungi. Yeast BELONG to Ascomycetes and are sometimes multi-cellular by FORMATION of SLENDER thread like structures called hyphae.

Right option is (a) PELLICLE

The explanation: Euglenoids have a protein rich layer called pellicle which MAKES their body flexible. Euglenoids have two flagella that HELP in their movement. Euglena CHANGES its body shape during its movement and this phenomenon called as METABOLY is possible due to pellicle.

The CORRECT OPTION is (b) False

To EXPLAIN I would say: All the unicellular eukaryotes are placed in Protista. But all PROTISTS are not unicellular. There are few protists that are multi-cellular. But all the protists are EUKARYOTIC organisms.

The correct choice is (a) True

Explanation: Classification of organisms by Linnaeus and ARISTOTLE didn’t include MANY organisms like fungi, BACTERIA and viruses into either of the kingdoms. Instead they were FORCED to COME under either of these.

The CORRECT answer is (a) Chitin

The best explanation: CELL wall in fungi is made up of chitin. In plants, the cell wall is made up of Cellulose. Whittaker’s classification managed to consider the nature of cell wall which resulted in Fungi and Plants forming TWO DIFFERENT kingdoms.

Right choice is (b) Agaricus bisporus

For explanation: Agaricus bisporus is the binomial NOMENCLATURE of the mushroom. Mushroom belongs to the DIVISION of BASIDIOMYCETES and class of Agaricomycetes. It belongs to the family AGARICACEAE and order Agaricales.

Correct choice is (b) Refrigerator provides dry and cold CONDITIONS that don’t let fungi grow

For explanation I would say: Fungi grow in MOIST and warm conditions. Refrigerator provides dry and cold conditions that prevent fungal GROWTH. Therefore food stored in refrigerator doesn’t get ROTTEN.

The correct answer is (a) Ascomycetes

For explanation I would SAY: Pencillium belongs to Ascomycetes. Other well-known examples of Ascomycetes comprise of yeast, ASPERGILLUS and Neurospora. Pencillium is also used in preparation of drugs LIKE PENICILLIN.

Correct answer is (a) Chrysophytes

The BEST EXPLANATION: Diatoms are grouped under Chrysophytes. Chrysophytes COMPRISE of golden algae, diatoms and plant LIKE protists etc. It’s because of the golden-yellow color of the species they are named as Chrysophytes.

Right answer is (c) Porifera

The explanation is: In WHITTAKER’s 5 kingdom CLASSIFICATION, all the unicellular organisms are categorised under PROTISTA. For example, Amoeba, PARAMECIUM, Chlorella and Chlamydomanas fall under the category of Protista.

Right choice is (a) True

The explanation is: Although Whittaker managed to consider cell STRUCTURE, nature of the cell, mode of nutrition and METHOD of reproduction in his classification he FAILED to INCLUDE viruses in his classification.