Plant Biology and Classification

Viruses are not included in any of the five kingdoms in Whittaker's classification because they are considered acellular and do not fit the criteria for living organisms in that system.

August Wilhelm Eichler is known for his system of plant classification, which divided the plant kingdom into Cryptogamae (non-seed plants) and Phanerogamae (seed plants).

Corallium rubrum, commonly known as precious coral or red coral, is widely used in the jewelry industry.

Meristematic tissue in plants consists of undifferentiated cells that are actively dividing, allowing for plant growth.

A keystone species is a species whose addition to or loss from an ecosystem leads to major changes in abundance or occurrence of at least one other species. One example is the herbivourous weevil Euhrychiopsis lecontei and its suggested keystone effects on aquatic plant species diversity by foraging on nuisance Eurasian Watermilfoil.

This is the correct answer as Brassica is resistant to white rust.

Leucoplasts are non-pigmented plastids found in plant cells that specialize in the storage of starch (amyloplasts), lipids (elaioplasts), or proteins (proteinoplasts). Chloroplasts are green and used for photosynthesis.

The tonoplast is the cytoplasmic membrane that surrounds the vacuole of a plant cell, separating the vacuolar contents from the cytoplasm.

Collenchyma is a supporting tissue in plants that is often found in the hypodermis of stems and leaves, providing structural support while allowing for growth.

Cell wall gives shape to a cell and protects it from mechanical injury and infection.

Middle lamella holds the cells of tissues together. 

Plant cell wall is primarily made up of cellulose.

Mesosomes are extensions of cell membrane which help in the synthesis of cell wall.

Blue-green algae, nitrogen fixing bacteria and archaebacteria are placed in Kingdom Monera. 

Among these, monerans are the most primitive organisms.They include various types of bacteria and blue-green algae.