Diversity In Living Organisms
Class 9th Science Together With Solution
- Who proposed the binomial nomenclature of classification and is considered as ‘Father of…
- Name a group where naked seeds are present.
- Mention an organism which exhibits characters of both plants and animals.…
- To which phylum do earthworm and leech belong?
- Give two peculiar characters of sponges.
- Identify the animal group having:(a) Body spiny and radial symmetry.(b) Bones light and…
- Name the group of plants that belongs to the division Thallophyta.…
- (a) Write one main characteristic feature that differentiates Gymnosperms from…
- Give four main features of phylum coelenterate.
- Characteristics of some organisms are given. Identify their group and give one example of…
- Write two differences between amphibia and reptilia.
- What are four main characteristics of chordates?
- Why are local names not sufficient to recognise the organism? What are the advantages of…
- Differentiate between Bryophyta and Pteridophyta. Give one example of each.…
- State the appropriate terms for the following:(a) Plants which bear seeds with two…
- Explain the three for grouping all organisms into five major kingdoms.…
- Write the characteristic features of Kingdom Protista.
- (a) Define classification. Give any two of its significances.(b) Classify the following…
- Explain the importance of classification. State two differences between Gymnosperms and…
Assess Yourself
Question 1.Who proposed the binomial nomenclature of classification and is considered as ‘Father of Taxonomy’? What was his nationality?
Answer:
Carolus Linnaeus (Karl von Linne) proposed the nomenclature of classification. He was a doctor by profession and was born in Sweden (Swedish).
Question 2.
Name a group where naked seeds are present.
Answer:
Gymnosperms
Gymno means naked, and sperma means seed. The plants belonging to this group bear naked seeds
Question 3.
Mention an organism which exhibits characters of both plants and animals.
Answer:
Euglena
Question 4.
To which phylum do earthworm and leech belong?
Answer:
Annelida
The animals belonging to this group show segments on the body. They are found in a variety of habitats such as fresh water, marine water and land.
Question 5.
Give two peculiar characters of sponges.
Answer:
The two peculiar features of sponges are:
(i) They are non motile animals, usually attached to some solid support
(ii) There are holes or 'pores' all over their body. These lead to canal system. Canal system acts as a circulating system for food and water.
Question 6.
Identify the animal group having:
(a) Body spiny and radial symmetry.
(b) Bones light and hollow.
(c) Soft-bodied animals supported by calcareous shells.
(d) Four pairs of jointed legs, head and thorax fused.
Answer:
(a) Echinodermata
(b) Aves
(c) Mollusc
(d) Arthropoda
Question 7.
Name the group of plants that belongs to the division Thallophyta.
Answer:
The plants belonging to this group are commonly called Algae. Examples are Spirogyra, Cladaphora, Ulothrix, Chara
Question 8.
(a) Write one main characteristic feature that differentiates Gymnosperms from Angiosperms.
(b) Give one example each of Gymnosperm and Angiosperm.
Answer:
Question 9.
Give four main features of phylum coelenterate.
Answer:
Main features of phylum coelenterate are as follows
(a) The animals belonging to phylum coelenterate live in water.
(b) They show more body differentiation. A body Cavity is present.
(c) Body is made up of two layers of cells; one makes up cells on the outside of the body, other makes up the inner lining of the body
(d) Some species live in colonies (coral), while some follow solitary life span (hydra)
Question 10.
Characteristics of some organisms are given. Identify their group and give one example of each.
(a) Single called, eukaryotic and photosynthetic
(b) The body is divided into segments, may be unisexual or hermaphrodite.
Answer:
(a) Protista
Examples are Algae, Diatoms and Protozoan
(b) Annelida
Examples are Earthworm, Leech
Question 11.
Write two differences between amphibia and reptilia.
Answer:
Question 12.
What are four main characteristics of chordates?
Answer:
All Chordates posses the following features
(a) Have a notochord
(b) Have a dorsal nerve cord
(c) Triploblastic
(d) Have paired gill pouches
(e) Are coelomate
Question 13.
Why are local names not sufficient to recognise the organism? What are the advantages of keeping scientific names?
Answer:
Local names are insufficient because same organism will have a different name, in different languages and cultures.
This will create difficulty and confusion.
Advantages of Scientific Name
(i)The system of scientific name for an organism is thus unique and universal.
(ii)Scientific name can be used to identify an organism anywhere in the world.
(ii)The scientific name of an organism is a result of classification, which puts it along with other organisms it is most related to.
Question 14.
Differentiate between Bryophyta and Pteridophyta. Give one example of each.
Answer:
Question 15.
State the appropriate terms for the following:
(a) Plants which bear seeds with two cotyledons.
(b) Animals which do not have coelom.
(c) Edible fungi
Answer:
(a) Dicotyledons (As per definition)
(b) Aceolomate (As per definition)
(c) Mushroom
Question 16.
Explain the three for grouping all organisms into five major kingdoms.
Answer:
(i) Presence of membrane bound organelles, including a nucleus. This helps the organism organise specialised functions.
Organisms without demarcated organelles will have biochemical pathway organised in different ways, which would further have an effect on every aspect of cell design.
(ii) Whether cells occur singly, or grouped together or do they live as an Indivisible group
Cells which are grouped together to form a single organism use the principle of division of labour. In such an animal, all cells would not be identical, but a group of cells will carry out specialized function.
(iii) Does the organism produce own food through photosynthesis
(iv) The level of organization of body of organisms who perform photosynthesis
(v) Of the animals, how does the individual's body develop and organizers different parts, and what are the specialized organs found for different functions.
Question 17.
Write the characteristic features of Kingdom Protista.
Answer:
The characteristic features of Kingdom Protista are as follows
(i) This group includes many kinds of eukaryotic unicellular organisms.
(ii) Some of these organisms use appendages, such as hair like cilia or whip like flagella for moving around.
(iii) Their mode of nutrition can be Autotrophic or heterotrophic
(iv) Examples of Protista are unicellular algae, diatoms and Protozoan.
Question 18.
(a) Define classification. Give any two of its significances.
(b) Classify the following plants into different plant divisions:
Spirogyra, Fern, Funaria, Pinus, Apple tree and Mustard plant.
Answer:
(a) Classification is identification and categorision in the basis of body design in form and function.
Significance of classification
• Classification helps to understand evolution, as both are closely related
• Helps to know the relationship between different plants/organisms, as organisms are put together on the basis of similarities.
(b)
Question 19.
Explain the importance of classification. State two differences between Gymnosperms and Angiosperms. What are the important phylums of Plant kingdom, give their names only? Write the names of the animals of the following phylums to which they belong:
(a) Porifera (b) Coelenterata
(c) Annelida (d) Mollusca
Answer:
Importance of classification
• Classification helps to understand evolution, as both are closely related.
• Classification helps to know the relationship between different plants/organisms, as organisms are put together on the basis of similarities.
Important phylum of plant kingdom
• Thallophyta
• Bryophyta
• Pteridophyta
• Gymnosperm
• Angiosperm
Animals belonging to the following phylums
(a) Porifera – Sycon, Spongilla
(b) Ceolenterata – hydra, sea anemone
(c) Annelida – earthworm, leeches
(d) Mollusc - octopus, pila