NCERT (Biology) Class-IX
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| BiologyDate Added: 2022-05-21 Which of the following is/are true for cells? 1. Cells were first discovered by Robert Hooke in 1655. 2. Robert observed the cells in a cork slice with the help of a primitive microscope. 3. Leeuwenhoek (1674), with the improved microscope, discovered the free living cells in pond water for the first time | ||
| BiologyDate Added: 2022-05-21 What is/are true for the cell theory? 1. The cell theory states that all the plants and animals are composed of cells and that the cell is the basic unit of life. 2. All cells arise from pre-existing cells. | ||
| BiologyDate Added: 2022-05-21 What is/are true for organisms? 1. Amoeba, Chlamydomonas, Paramoecium and bacteria are called unicellular organisms. 2. Fungi, plants and animals are multicellular organisms. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are true for cells? 1. Each cell has got certain specific components within it known as cell organelles. 2. All cells are found to have different organelles. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are true for plasma membrane? 1. It is the outermost covering of the cell. 2. It allows or permits the entry and exit of some materials in and out of the cell. 3. The plasma membrane is flexible and is made up of organic molecules called minerals and proteins. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correctly matched? 1. Hypotonic solution-------water concentration is more in surrounding 2. Isotonic solution-----------no movement of water 3. Hypertonic solution-------- lower concentration of water than the cell | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are true for the cell wall? 1. It is present in animals and plants. 2. The cell wall lies outside the plasma membrane. 3. The plant cell wall is mainly composed of cellulose. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are true for nucleus? 1. The nucleus has a double layered covering called nuclear membrane. 2. The nucleus contains chromosomes, which are visible as rod-shaped structures. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are true for prokaryotes? 1. The cell of the organisms lack a nuclear membrane. 2. All the cytoplasmic organelles are present. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are true for cytoplasm? 1. The cytoplasm is the fluid content inside the plasma membrane. 2. Prokaryotic cells lack cell organelles. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correctly matched? 1. Rough Endoplasmic Recticulum--------ribosomes attached to surface. 2. SER---------manufacture of fats 3. Golgi Apparatus---------waste disposal system | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are true for mitochondria? 1. Mitochondria are known as the powerhouses of the cell. 2. The energy required for various chemical activities needed for life is released by mitochondria in the form of ATP (Adenosine triphopshate) molecules. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are true for plastids? 1. Plastids present in plant cells 2. Two types are– chromoplasts and leucoplasts 3. Starch and proteins are stored in chromoplast. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are true for vacuoles? 1. Vacuoles are storage sacs for solid or liquid contents 2. Vacuoles are small sized in plant cells. 3. In plant cells vacuoles are full of cell sap and provide turgidity and rigidity to the cell. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correctly matched? 1. Merismatic tissue----------responsible for growth. 2. Apical meristem------------present near the node. 3. Differentiation-------------taking a permanent shape. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correctly matched? 1. Parenchyma-------------unspecialised cells 2. Chlorenchyma-----------perform photosynthesis 3. Collenchyma--------------contain cholorophyll | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are true for sclerenchyma? 1. It is a permanent tissue. 2. It is made of sclerenchymatous tissue. 3. The cells of this tissue are living. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for the epidermis? 1. The epidermis is usually made of a single layer of cells 2. It protects all the parts of the plant. 3. Cells of epidermal tissue form a continuous layer with intercellular spaces. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for cells of cork? 1. Cells of cork are dead. 2. They also have a substance called suberin in their walls. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for xylem? 1. It transports food from leaves to other parts of the plant 2. Xylem consists of tracheids, vessels, xylem parenchyma 3. Tracheids and vessels have thick walls | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for phloem? 1. It transports food from leaves to other parts of the plant 2. Phloem is made up of five types of cells. 3. Sieve tubes are tubular cells with perforated walls. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for epithelial tissue? 1. The covering or protective tissues in the animal body are epithelial tissues. 2. Epithelial tissue cells are loosely packed and form a continuous sheet. 3. Anything entering or leaving the body must cross at least one layer of epithelium. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correctly matched? 1. Squamous epithelium----------- in cells lining blood vessels or lung alveoli 2. Columnar epithelium------------ the inner lining of the intestine 3. Cuboidal epithelium------------- the lining of kidney tubule 4. Glandular epithelium----------- oesophagus | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are true for a connective tissue? 1. Blood is an example. 2. The cells of a connective tissue are tightly spaced. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correctly matched? 1. Bone cells----------- embedded in a hard matrix that is composed of calcium and phosphorus 2. Tendons-------------very elastic 3. Cartilage----------matrix composed of proteins and sugars 4. Areolar tissue----------helps in repair of tissue | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for muscular tissue? 1. A muscular tissue consists of elongated cells, also called muscle fibres 2. Muscles contain special proteins called contractile proteins, which contract and relax to cause movement. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correctly matched? 1. Smooth muscles---------------involunatry actions 2. Striated Muscles---------- long, cylindrical, unbranched 3. Cardiac----------------------movement of body | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for biodiversity? 1. Biodiversity means the diversity of life forms. 2. It refers to the variety of life forms found in a different region. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are true for classification and evolution? 1. Greek thinker Aristotle classified animals according to whether they lived on land, in water or in air. 2. Charles Darwin first described this idea of evolution in 1859 in his book–The Origin of Species. | ||
| BiologyDate Added: 2022-05-21 Which of the following is the correct order of classification? | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for Monera? 1. These organisms do not have a defined nucleus or organelles. 2. The mode of nutrition of organisms in this group can be either by synthesising their own food (autotrophic) or getting it from the environment (heterotrophic). 3. Examples are unicellular algae, diatoms and protozoans. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for Protista? 1. This group includes many kinds of unicellular prokaryotic organisms. 2. Their mode of nutrition can be autotrophic or heterotrophic. 3. Examples are unicellular algae, diatoms and protozoans. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for fungi? 1. These are heterotrophic eukaryotic organisms. 2. Their mode of nutrition can be autotrophic or heterotrophic. 3. Some fungal species live in permanent mutually dependent relationships with bluegreen algae. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for Thallophyta? 1. Plants do not have well-differentiated body design. 2. They are also called algae. 3. Examples are Spirogyra, Ulothrix, | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for Bryophyta? 1. These are called the amphibians of the plant kingdom. 2. There are specialised tissue for the conduction of water and other substances. 3. Examples are moss (Funaria) and Marchantia. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for Pteridophyta ? 1. The plant body is differentiated into roots, stem and leaves. 2. They have specialised tissues for the conduction of water and other substances. 3. Marsilea, ferns and horse-tails are examples. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for Angiosperms? 1. These are also called flowering plants. 2. The seeds develop inside an ovary which is modified to become a fruit. 3. Cotyledons are called 'seed leaves. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for gymnosperms? 1. The plants of this group bear naked seeds. 2. They are usually perennial, deciduous and woody. 3. Examples are pines and deodar | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for Porifera? 1. These are non-motile animals attached to some solid support. 2. There are holes or pores, all over the body. 3. These animals are covered with a soft outside layer. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for coelenterate? 1. These are animals living in water. 2. There is no cavity in the body. 3. Jellyfish and sea anemones are common examples | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for Platyhelminthes? 1. The body is bilaterally symmetrical. 2. There is a true internal body cavity or coelom. 3. They are either free-living or parasitic | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for nematoda? 1. The nematode body is bilaterally unsymmetrical. 2. There are tissues, but no real organs. 3. The body is cylindrical. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for annelid? 1. They have a true body cavity. 2. These animals are found in a variety of habitats- fresh water, marine water as well as land. 3. Earthworms and leeches are examples. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for arthropoda? 1. These animals are bilaterally symmetrical and segmented. 2. There is an closed circulatory system. 3. They have jointed legs. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for protochordata? 1. They have a notochord. 2. Protochordates are marine animals. 3. Examples are Balanoglossus, Herdmania. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are characteristics of a vertebrata? 1. A notochord 2. Unpaired gill pouches 3. Triploblastic | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correctly matched? 1. Cyclostomata----------jawless vertebrates. 2. Pisces-------------Streamlined body 3. Amphibia-----------four chambered heart 4. Aves----------------warm-blooded | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correctly matched? 1. Acute disease-----------short duration 2. Chronic--------------------lifetime. 3. Disease-------------------feeling uncomfortable | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are true for a infectious disease? 1. Diseases where microbes are the immediate causes are called infectious diseases. 2. They are not caused by infectious agents. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are true for Peptic ulcers? 1. A bacterium, Helicobacter pylori, is responsible for Peptic ulcers. 2. It was studied by Marshall and Warren. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correctly matched? 1. Leishmania-----kala azar 2. Staphylococc--------acne 3. Trypanosoma------------ Ascaris lumbricoides | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correctly matched? 1. Cholera---------water 2. Syphilis--------sexual contact 3. Jaundice---------bacteria | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correctly matched? 1. Lithosphere------earth crust 2. Hydrosphere-------water 3. Bioshpere----------air blanket | ||
| BiologyDate Added: 2022-05-21 What is/are true for the role of atmosphere? 1. The atmosphere keeps the average temperature of the Earth fairly steady during the day 2. During the night, it slows down the escape of heat into outer space. | ||
| BiologyDate Added: 2022-05-21 Which of the following factors influence winds? 1. Uneven heating of the Earth 2. Revolution of the Earth 3. Mountain ranges | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are effect of water pollution? 1. Disease causing microbes in water. 2. Reduction in amount of dissolved oxygen. 3. Sudden change in temperature effect the breeding of aquatic animals. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are the factors responsible for formation of soil? 1. Wind 2. Sun 3. Rocks 4. Water | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for the ozone layer? 1. It is found in the form of a diatomic molecule. 2. It is poisonous. 3. It absorbs harmful radiations from the Sun | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are ways of improving the crop? 1. Hybridisation 2. Introducing a gene | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are effected by variety improvement? 1. Higher yield 2. Biotic and abiotic resistance 3. Wider adaptability 4. Increase in maturity duration | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are macro-nutrients? 1. Nitrogen 2. Iron 3. Calcium 4. Magnesium | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are true for manures? 1. Manure contains large quantities of organic matter. 2. Manure helps in enriching soil with nutrients and organic matter and increasing soil fertility. 3. Based on the kind of biological material used, manure can be classified into three types. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are true for fertilizers? 1. Fertilizers are commercially produced plant nutrients. 2. Fertilizers supply nitrogen, phosphorus and potassium. 3. They preserve the soil fertility. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are sources of water for irrigation? 1. River 2. Ponds 3. Ocean 4. Tanks | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for drought? 1. Droughts occur because of scarcity or irregular distribution of rains 2. In areas with light soils, crops get adversely affected by drought conditions. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correct for intercropping? 1. Inter-cropping is growing two or more crops simultaneously on the same field in a definite pattern. 2. The crops are selected such that their nutrient requirements are same. 3. Examples are soyabean + maize, or finger millet (bajra) + cowpea (lobia). | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are true for weeds and pest? 1. Weeds compete for food, space and light. 2. Generally insect pests attack the plants in two ways. 3. Weeds are unwanted plants in the cultivated field. | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correctly matched? 1. Milch Animals------------milk giving 2. Draught Animals-----------used for labour 3. Bos Indicus-----------------buffaloes | ||
| BiologyDate Added: 2022-05-21 Which of the following is/are correctly matched? 1. Apisceranaindica-------Indian Bee 2. A dorsata-----------Rock Bee 3. A florae---------------Little Bee 4. A mellifera-----------French Bee | ||