Can anyone tell the most important questions of ch.biological classification class 11th
Answers
Q.1. What advantages does the five-kingdom classification have over the two-kingdom classification?
A.1. The advantages of five kingdom classification over two kingdom classification are as follows:
It is based upon cell structure
It is based upon the body structure
Nutrition
Way of living
Phylogenetic relationship
More to Read: Five Kingdoms Classification
Q.2. Why are cyanobacteria used in agricultural fields for crop improvement?
A.2. Cyanobacteria have the ability to fix atmospheric nitrogen and make it available to the plants. This improves the crop yield. That is why cyanobacteria are used in agricultural fields.
Also read: Crop Improvement
Q.3.Give an example of insectivorous plants.
A.3.Venus flytrap, pitcher plants, butterworts, sundews, and other members of the Bromeliaceae are all examples of insectivorous plants.
Q.4. What similarities do a virus and non-living objects share?
A.4. A virus is considered living inside the host but non-living when outside the host. This is because:
Inert nature.
Inability to reproduce.
No cellular organization.
It cannot grow and divide.
Q.5. Why do polluted water bodies have an abundance of Nostoc and Oscillatoria?
A.5. The nutrients present in the polluted water bodies enhance the growth of algal plants such as Nostoc and Oscillatoria.
Q.6. Name the eukaryotic kingdoms in the five-kingdom classification proposed by Whittaker.
A.6. The eukaryotic kingdoms in the five-kingdom classification are:
Protista
Fungi
Animalia
Plantae
Q.7. What is the nature of the cell wall in diatoms?
A.7. The cell wall of diatoms forms two thin overlapping cells. It is made up of silica.
Q.8. Who proposed the five-kingdom classification?
A.8. Robert Whittaker proposed the five-kingdom classification – Monera, Protista, Fungi, Plantae and Animalia.
Q.9. What is the difference between a virus and a viroid?
A.9. A virus contains DNA or RNA as the genetic material and a protein coat whereas the viroids do not have a protein coat but RNA as genetic material.
Q.10. State the uses of heterotrophic bacteria and archaebacteria which are economically important.
A.10.
Heterotrophic Bacteria
They maintain the fertility of the soil by nitrogen fixation, ammonification and nitrification. Eg., Rhizobium
The milk products such as cheese, curd are obtained by bacteria.
Archaebacteria
Biogas is produced by methanogens from animal dung.