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Solutions 7. Diversity in Living Organisms - Additional -Questions 3 | Class 9 Science - Toppers Study
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Solutions 7. Diversity in Living Organisms - Additional -Questions 3 | Class 9 Science - Toppers Study
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Chapter 7 Science class 9
Additional -Questions 3 class 9 Science Chapter 7. Diversity in Living Organisms
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7. Diversity in Living Organisms
| Additional -Questions 3 |
Solutions 7. Diversity in Living Organisms - Additional -Questions 3 | Class 9 Science - Toppers Study
Additional Questions With Solutions
LONG ANSWER TYPE:
Que: In How many classes Plantae is divided?
Ans: Plantae is divided into five parts.
(i) Thallophyta
(ii) Pteridophyta
(iii) Bryophyta
(iv) Gymnosperms
(v) Angiosperms
Que: write the properties of THALLOPHYTA.
Ans:
(i) Plants that do not have well-differentiated body design fall in this group.
(ii) he plants in this group are commonly called algae
(iii) These are aquatic plants. Examples are Spirogyra, Ulothrix, Cladophora and Chara
Que: Write the properties of BRYOPHYTA.
Ans:
(i) These plants are both aquatic and teristetial so this group is called the amphibian of plant kingdom.
(ii) The plant body is commonly differentiated to form stem and leaf-like structures.
(iii) There is no specialized tissue for the conduction of water and other substances from one part of the plant body to another.
(iv) Examples are moss (Funaria) and Marchantia
Que: Write the properties of Pteridophyta.
Ans:
(i) The plant body is differentiated into roots, stem and leaves.
(ii) It has specialised tissue for the conduction of water and other substances.
(iii) Examples are Marsilea, ferns and horse-tails.
(iv) It has naked embryos that are called spores.
(v) The reproductive organs of plants in all these three groups are very inconspicuous.
Que: Write the properties of gymnosperms.
Ans:
(i) This group bear naked seeds.
(ii) These are usually perennial, evergreen and woody.
(iii) Examples – Pines such as Deodar , and Cycas.
Que: Write the properties of angiosperms.
Ans:
(i) The seeds develop inside an organ which is modified to become a fruit.
(ii) These are also called flowering plants.
(iii) plant embryos in seeds have structures called cotyledons.
Que: Write two differences between Gymnosperms and Angiosperms.
Ans:
Gymnosperms |
Angiosperms |
|
|
Que: In How many part animalia kingdom is divided?
Ans: Animalia kingdom is divided into two part.
(i) Chordate
(ii) Non chordate
Que: What are the advantages of classification of Organisms?.
Ans: The advantages of classification of Organisms.
(i) It tells relations among the various classes of organisms.
(ii) It describe about the evolution of organisms.
(iii) It makes simple the study of various organisms.
Que : Write the difference between Pteridophyta and Phanerogams.
Ans:
Pteridophyta:
(i) It has no ability to produce seeds.
(ii) The reproductive organs are very inconspicuous (hidden).
Phanerogams:
(i) Seeds are the result of the reproductive process.
(ii) Reproductive tissues are well differentiated (developed).
Que: What features do All chordates possess?
Ans: All chordates possess the following features:
(i) They have a notochord
(ii) They have a dorsal nerve cord
(iii) They are triploblastic
(iv) They have paired gill pouches
(v) They are coelomate.
Que: Explain the basis for grouping organisms into five kingdoms.
Ans: The major characteristics considered for classifying all organisms into five major kingdoms are:
(a) whether they are made of prokaryotic or eukaryotic cells
(b) whether the cells are living singly or organised into multicellular and thus complex organisms
(c) whether the cells have a cell-wall and whether they prepare their own food.
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