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Class/Subject: 9th Class Biology
Chapter Name: Biodiversity
Board: Federal Board
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FBISE 9th Class Biology Chapter 3 Biodiversity Short Questions Answers
The measure of the variety of organisms present in the different ecosystems is called biodiversity.
It includes eukaryotic, multicellular, consumers. The lack calls well and can do locomotion e.g. human, lion, etc.
A class is a group of related orders is called a class.
The protection, preservation, management, and restoration of the natural environment and the ecological communities that inhabitant them.
Markhor is the national animal and Chakor Patridge is the national bird of Pakistan.
This bird flies to Pakistan in the winter season from former Soviet territory and settles in Cholistan and Thar desert. The decline in its population due to hunting by foreigners and destruction of its habitat.
The study of the total found animals in a particular region is known as Fauna.
A group of heterotrophic organisms with the absorptive mode of nutrition is called fungi.
It includes prokaryotic organisms. They lack a definite membrane-bounded nucleus and membrane-bounded organelles.
1. The International Union for the Conservation of Nature and Natural Resources (IUCN).
2. The World Wildlife Fund – Pakistan (WWF-P).
A species is called extinct when there is no doubt that the last individual of that species has died.
1. Protozoans, (Animal-like protists)
2. Algae (Plant-like protists)
3. Fungi like protists
The species is at risk of becoming extinct because few members are left.
The system of naming organisms, in which the name consists of two words i.e. generic name and species name.
Non-cellular, a living entity without cells ia called cellular. e.g, viroid, prion.
The level of cellular organization i.e.
Prions are infectious particles that are composed of protein only and cause infectious diseases in certain plants Prions.
Viroids are also infectious particles but they are compared to circular RNA only. They also cause infectious diseases in certain plants is called Viroids.
Group of organisms which can interbreed freely among. They and produce fertile offsprings, but are reproductively isolated from all other such groups in nature.
The groups into which organisms are classified are known as Taxa.
The Taxa form a ladder is known as Taxonomic Hierarchy.
The biodiversity found on earth today is the result of 4 Billion years of evolution.
Biodiversity provides food for human
A significant proportion of drugs are derived directly
A wide range of industrial materials, e.g. building material, fibers, dyes, resins, gums, adhesives, rubber, and oil are derived are directly from plants.
Maintenance of Ecosystem:
Biodiversity plays an important role in making and maintaining ecosystems.
It helps in regulating the chemistry of our atmosphere and water supply.
Biodiversity is directly involved in the recycling of nutrients and providing fertile soils.
The branch of science which deals with the classification of organisms is called Taxonomy.
The branch of biology deals with classification and traces the evolutionary history of organisms. is called systematic.
The criteria for interbreeding cannot be used for species recognition in organisms who reproduce asexually and do not interbreed with one another (for example many unicellular) organisms.
A family is a group of related genera is called family.
A genus is a group-related species is called a genus.
It consists of the group of most diverse organisms. It consists of unicellular and simple multicellular eukaryotes. It includes animals like protozoPlant-like algae and fungi like protist.
The removal of the top layer of soil by wind, rain or floods is called soil erosion.
Lion, Asiatic Cheetah, Tiger, Indian one-horned Rhinoceros, Swamp deer, Indian wilds ass, Hangul, and Black Buck.
They don’t have multicellular sex organs and don’t form embryos during their life cycles.
The kingdom is the largest taxon while species is the smallest taxon.
(i) To determine similarities and differences among organisms so that they can be recognized and studied easily.
(ii) To find the evolutionary relationship among organisms.
(iv) Presence of other species
The cutting down of trees for the conversion of a forest to non-forest land is called deforestation. It is done for using the land for various purposes. Humans use this land for pasture or urban use etc.
In the definition of species, we must emphasize “in nature” because two organisms related to two different but closely related species can cross-breed under artificial conditions. But in such unnatural crosses, they produce infertile offspring.
In 1937, E-Chatton suggested the terms of ‘Procaryotique’ to describe bacteria and ‘Eucariotique’ to describe animal and plant cells.
The monerans evolved first and live in extreme habitats.
In the evolutionary tree, the group of descendants having the same ancestor.
The species that are at risk of becoming extinct in near future are called threatened species.
An order is a group of related families is called order.
A phylum is a group of related classes is called a phylum.
Viroids Are composed of circular RNA only and act as infectious particles and cause diseases in certain plants.
10 million kinds of organisms inhabit the earth. But biologists studied and cataloged less than one-third of these. Diversity among the organisms is more obvious than the fundamental unity of life. The diversity emerged as modifications in organisms.
(i) Forest support biodiversity
(ii) Forests provide habitat for wildlife
(iii) Forests are the source of medicines, timber, fuel, wood, etc.
Chitral lies on the migratory route of several important bird species. These birds face enormous hunting pressure. WWF-Pakistan initiated efforts to reduce the hunting pressure in 1992. These efforts proved successful.
(i) This system has great value. It has widespread use.
(ii) There is the stability of its names. Every species can be unambiguously indefinitely by binomial nomenclature.
(iii) It requires just two words.
(iv) THe same name can be used all over the world, in all languages. It avoids difficulties of translation.
A species is a group of organisms that can interbreed freely among them and produce fertile offspring but are reproductively isolated from all other such groups in nature.
It includes eukaryotic multicellular autotrophs. They have multicellular sex organs Cell wall is made up of cellulose.
(i) It includes eukaryotic unicellular and simple multicellular organisms.
(ii) The organisms that may be photosynthetic are heterotropic.
The IUCN has prepared the first national Red List (list of endangered or threatened species).