Question:
Why do we classify organisms?
Answer:
Classification helps us understand biodiversity better way. Biodiversity has direct and indirect economic benefits to humans as well as to our ecosystem. A systematic study of such biodiversity is essential to better understand the inter-relationships in our ecosystems. Following are the needs to classify them:
- Plants and animals have valuable genetic variation information. It will help us understand the ways evolution take place.
- Humans often benefit from plants and animals in different ways. A systematic study will help to explore other potential benefits.
- Certain species warn us of imbalances in our ecosystem. e.g. white-rumped vultures became almost extinct because of use of drug burfen (diclofenac) in domestic animals. When vultures ate these dead animals, it led to their kidney failures. A systematic study of the organisms would help in restoring the balance in their ecosystems.
- Plants and animals have been the inspiration for technology and engineering design. e.g. SONARS and RADARS work on the same acoustics principles as used by bats. Classification will help us revealing such more inspirations.
- It is estimated that the Earth has almost 8.8 million animal, plant, and fungi species, but we’ve only discovered less than a one-fourth of this. Classification gives a system for identification of known and unknown organisms.
Diversity in Living Organisms
Q 1.
Give examples of Arthropod animals.
Q 2.
Name a reptile which has four chambered heart.
Q 3.
Give two examples of Gymnosperms.
Q 4.
Cold blooded, two chamber heart, stream lined body, scales on skin, gills present, aquatic life. Which group of vertebrates are we referring to?
Q 5.
What are the advantages of classification?
Q 6.
In how many kingdoms Carolus Linnaeus diving living beings?
Q 7.
What are the major divisions in the Plantae? What is the basis for these divisions?
Q 8.
Give examples of bryophytes.
Q 9.
Name the phylum to which the following are included. (i) Spider (ii) Cockroach (iii) Prawn (iv) Housefly
Q 10.
How is a body of Arthropods segmented?
Q 11.
Give three examples of Molluscs
Q 12.
Give three examples of the range of variations that you see in lifeforms around you.
Q 14.
What is the criterion for classification of organisms as belonging to kingdom Monera or Protista?
Q 15.
Why are Thallophytes called non-embryonic plants?
Q 16.
On what basis plants are divided into two sub-kingdoms?
Q 17.
Give examples of Porifera or Sponges.
Q 18.
Which animal phylum is considered to be first triploblastic animals?
Q 19.
What is the most striking feature of phylum Arthropoda?
Q 20.
What is the primary characteristic on which the first division of organisms is made?
Q 21.
Identify the division of Plantae having following characteristics:
i. Seeds not enclosed within fruit.
ii. Flowers represented as cones (unisexual)
iii. Ovules not located in ovary.
Q 22.
Which worms cause elephantiasis. Name the group it belongs to?
Q 23.
Who wrote the book
The Origin of Species?
Q 24.
According to the five-kingdom system, which kingdom contains organisms whose structure is composed of prokaryotic cells?
Q 25.
Blue-green algae are classified with bacteria and placed in kingdom Monera.
Q 26.
Give the scientific names of tiger, peacock, ant, neem, lotus and potato.
Q 27.
Name the kingdom which includes the simplest form of eukaryotes.
Q 28.
Give two examples of Pteridophyes
Q 29.
Give three examples of animals belong to Echinodermata
Q 31.
On what bases are plants and animals put into different categories?
Q 32.
In the hierarchy of classification, which grouping will have the smallest number of organisms with a maximum of characteristics in common and which will have the largest number of organisms?
Q 34.
List important characteristics (at least three) of bryophytes.
Q 35.
Name the plants that are called "
First vascular land plants".
Q 36.
What are the general characteristics found in all animals?
Q 37.
In how many Phyla, the animal kingdom is divided into?
Q 38.
What are four main features of phylum coelenterates?
Q 39.
Animals belong to phylum Coelenterata are diploblastic. What do you mean by the term diploblastic?
Q 40.
Differentiate between Annelida and Nematode.
Q 41.
What is the type of circulatory system present in Arthropods?
Q 42.
What kind of circulatory system is found in animals from Mollusca phylum?
Q 43.
Why are Bats and whales classified as mammals?
Q 44.
Give examples of the organisms that have cilia and flagellum for moving around.
Q 45.
In the hierarchy of classification, which group will have the smallest number of organisms and a maximum number of similar characteristics?
Q 46.
In the hierarchy of classification, which group will have the largest number of organisms?
Q 47.
Who introduced the system of scientific nomenclature of organisms?
Q 48.
Name the simplest of plants that do not have a well-differentiated body design.
Q 49.
Write the name of the group of plants, which produces seeds, but not fruits.
Q 50.
Amar, Ujala and Anara wrote the scientic name of mango as follows. Who wrote it correctly.
Amar - Mangifera Indica
Ujala - Mangifera indica
Anara - mangifera indica
