Biological Classification Test - 36

• Viruses possess nucleic acid (either DNA or RNA) enclosed in a protein coat called a capsid. 
• It does not possess any cellular structure. 
• They are inactive outside any living body. They can replicate only inside the living cells of other organisms.
• Viruses can be crystallized. The first virus to be crystallized is the Tobacco Mosaic virus.

Thus, the correct answer is (C).

Fungi reproduce by spores to produce new fungi. Thus, Option B is correct.

Mushrooms reproduce asexually by spores and mycelial fragmentation. Conidiophores are the specialized structures where spores are formed. In the process of budding an outgrowth of the parent separates into a new cell.

The correct answer is D.

Fungi are not capable of producing their own food, so they get their nourishment from other sources. They are heterotrophic. They lack chlorophyll.

Solution

Correct answer is option D.

Explanation for correct option:

• Asexual reproduction: - It does not include the union of gametes or variation in the number of chromosomes.
• The generation that results from asexual reproduction inherits the genes of that parent.
• Asexual reproduction is the original form of reproduction for unicellular organisms such as archaea and bacteria.
• There are various asexual reproduction methods by which the unicellular organisms divide like fission, budding, vegetative propagation etc.

 

Characteristics of fungi are: They are non-photosynthetic. The mode of nutrition is heterotrophic. Most of them are saprophytes as they feed on dead and decaying organic matter. Some of them are parasitic. Most fungi are multicellular, except yeast, which is the only unicellular fungus.  Some fungi live in symbiotic (mutually dependent) relationships with blue-green algae as in lichens.