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.
Commonly called flatworm, bilateral symmetrical, acoelomates are the features of which animal division?
Q 2.
Name the levels of classification proposed by Linnaeus. What happens to similarities among organisms as we go from top to bottom level?
Q 3.
Filarial worms, (Ascaris)round worms, (Wuchereria)pin worms belong to which group of animalia?
Q 4.
Why do we classify organisms?
Q 5.
Who wrote the book
The Origin of Species?
Q 6.
How Phanerogams are divided further chiefly?
Q 7.
Give examples of organisms which belong to Phylum Protochordata.
Q 8.
Why are Bats and whales classified as mammals?
Q 9.
No scales on skin, mucus glands on skin, three chambered heart, respiration through gills, lungs and skin, oviparous, live on land and in water. Name the group of these vertebrates.
Q 10.
Snakes, turtles, lizards and crocodiles belong to which category of vertebrates?
Q 11.
Give examples of egg laying mammals
Q 12.
Give three examples of animals belong to Echinodermata
Q 13.
Write the differences between monocots and dicots.
Q 14.
Name the largest group (phylum) of animals.
Q 15.
Name the kingdom which includes the simplest form of eukaryotes.
Q 16.
Woese introduced by dividing the Monera kingdom into two sub-kingdoms. Name the two?
Q 17.
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 18.
Hydra, Jelly Fish, corals belog to which group of animals?
Q 19.
In how many kingdoms Carolus Linnaeus diving living beings?
Q 20.
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 21.
What are naked-seeded plants are called?
Q 22.
Which animal phylum is commonly called as flatworms?
Q 23.
Write important features about Phylum Platyhelminthes.
Q 24.
Give examples of animals belong to Nematoda.
Q 25.
Name a parasitic disease caused by members of Nematoda.
Q 26.
Which in your opinion is more basic characteristic for classifying organism. The place where they live in or the kind of cells they are made of?
Q 27.
Write the name of the group of plants, which produces seeds, but not fruits.
Q 28.
Which is the largest group of animals?
Q 29.
Name a reptile which has four chambered heart.
Q 30.
Which do you think is a more basic characteristic for classifying organisms?(a) the place where they live.(b) the kind of cells they are made of. Why?
Q 33.
On what basis plants are divided into two sub-kingdoms?
Q 34.
How Angiosperms are divided further?
Q 35.
What is the type of circulatory system present in Arthropods?
Q 36.
Name the phylum to which Start fish and Sea urchin belong to?
Q 37.
What is a notochord? What does it do?
Q 38.
In the hierarchy of classification, which group will have the largest number of organisms?
Q 39.
Algae belongs to which division of Plantae?
Q 40.
Minimal body design, have holes which lead to canal system that helps in circulating water, marine habitat. Which division of Animalia it refers to?
Q 41.
Give three examples of Molluscs
Q 42.
Give three examples of Protochordata animals.
Q 43.
How do gymnosperms and angiosperms differ from each other?
Q 44.
Name the phylum to which the following are included. (i) Spider (ii) Cockroach (iii) Prawn (iv) Housefly
Q 45.
Give examples of Arthropod animals.
Q 46.
How do annelid animals differ from arthropods?
Q 47.
Give examples of animals that belong to Phylum Mollusca.
Q 48.
What is the primary characteristic on which the first division of organisms is made?
Q 49.
Name the two groups of Plantae that are commonly called phanerogams.
Q 50.
Identify the Animalia group having following features:
