NCERT (Biology) Class-X
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| BiologyDate Added: 2022-05-21 Consider the following statements: 1. The dialysing fluid has high osmotic pressure compared to blood and it is devoid of nitrogenous wastes. 2. The dialysis is similar to the function of the kidney, but it is different since there is no reabsorption involved. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 The basic filtration unit in kidneys is | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. The translocation in phloem is achieved by simple physical forces. 2. Material like sucrose is transferred into phloem tissue using energy from ATP Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. In xylem tissue, vessels, sieve tubes and tracheids of the roots, stems and leaves are interconnected to form a continuous system of water-conducting channels reaching all parts of the plant. 2. The transport of soluble products of photosynthesis is called translocation and it occurs in the part of the vascular tissue known as phloem. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. The transpiration helps in the absorption and upward movement of water and minerals dissolved in it from roots to the leaves. 2. During the day when the stomata are open, root pressure becomes the major driving force in the movement of water in the xylem. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 The loss of water in the form of vapour from the aerial parts of the plant is known as | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. Lymph is similar to the plasma of blood but colourless and contains less protein. 2. Lymph carries digested and absorbed fat from liver and drains excess fluid from extra cellular space back into the blood. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. Arteries are the vessels which carry blood away from the heart to various organs of the body. 2. Veins have thick, elastic walls to ensure that the blood flows only in one direction. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. The blood pressure is much greater in veins than in arteries. 2. High blood pressure is also called hypertension and is caused by the constriction of arterioles. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 The blood in human beings transports 1. Carbon-Dioxide 2. Oxygen Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. During the breathing cycle, when air is taken in and let out, the lungs always contain a residual volume of air so that there is sufficient time for oxygen to be absorbed and for the carbon dioxide to be released. 2. Carbon dioxide is less soluble in water than oxygen and hence is mostly not transported in the dissolved form in blood. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. Breakdown of pyruvate in the absence of air (oxygen) takes place in mitochondria. 2. Glucose is breakdown into a three-carbon molecule called pyruvate in the cytoplasm. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. The food coming from the stomach to small intestine is acidic in nature. 2. The pancreas secretes pancreatic juice which contains enzymes like pepsin and mucus. 3. The gastric glands in stomach release enzymes like trypsin for digesting proteins and lipase for breaking down emulsified fats. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. The small intestine is the site of the complete digestion of carbohydrates, proteins and fats. 2. Herbivores eating grass need a shorter small intestine to allow the cellulose to be digested whereas carnivores like tigers have a longer small intestine. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 The breakdown of pyruvate to give carbon dioxide, water and energy takes place in | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. The opening and closing of the pore in leaves is a function of the Stomata. 2. Desert plants take up oxygen at night and prepare an intermediate which is acted upon by the energy absorbed by the chlorophyll during the day. 3. Stomata helps in the exchange of gases across the surface of stems, roots and leaves as well. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. In Amoeba, the cell has a definite shape and food is taken in at a specific spot. 2. Paramecium takes in food using temporary finger-like extensions of the cell surface which fuse over the food particle forming a food-vacuole. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. The internal energy reserve for plants is starch and for human beings is glycogen. 2. Carbon and energy requirements of the autotrophic organism are fulfilled by photosynthesis. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. The maintenance function of living organisms is continuous in nature. 2. Life on earth depends on carbon based molecules; most of these food sources are also carbon-based. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. During the process of respiration, organic compounds such as glucose are broken down to provide energy in the form of ATP. 2. Anaerobic respiration makes more energy available to the organism. 3. In human beings, the transport of materials such as oxygen, carbon dioxide, food and excretory products is a function of the circulatory system. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. The electrical impulse travels from the dendrite to the cell body, and then along the axon to its end. 2. Reflex arcs are formed in the brain to act fast. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. The gustatory receptors will detect smell while olfactory receptors will detect taste. 2. The nervous tissue is made up of an organized network of nerve cells or neurons. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. The brain and spinal cord constitute the central nervous system. 2. The mid-brain is the main thinking part of the brain. 3. The sensation of feeling full is because of a centre associated with hunger, which is in a separate part of the hind-brain. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following activities: 1. Walking in a straight line 2. Riding a bicycle 3. Picking up a pencil Which of the above activities are controlled by hind-brain? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements related to response to stimulus in plants: 1. The plants use electrical-chemical means to convey information from cell to cell, but unlike in animals, there is no specialised tissue in plants for the conduction of information. 2. Plant cells change shape with the help of specialised proteins found in them. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. A plant hormone called auxin inhibits growth. 2. Cytokinins promote cell division and they are present in greater concentration in areas of rapid cell division. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. The roots of a plant always grow downwards while the shoots usually grow upwards and away from the earth due to hydrotropism. 2. When light is coming from one side of the plant, auxin diffuses towards the shady side of the shoot to promote growth. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following: 1. Reflex action 2. Voluntary action 3. Involuntary action Which of the above are the responses by the nervous system? | ||
| BiologyDate Added: 2022-05-21 Which of the following is a plant hormone? | ||
| BiologyDate Added: 2022-05-21 The gap between two neurons is called a | ||
| BiologyDate Added: 2022-05-21 The brain is responsible for | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. Iodine is necessary for the hormones secreted by the pituitary. 2. Insulin is a hormone which is produced by the pancreas and helps in regulating blood sugar levels. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 The hormone produced in plants due to which the stem bends towards sunlight is | ||
| BiologyDate Added: 2022-05-21 Arrange the following in chronological order: 1. Foetus 2. Zygote 3. Embryo | ||
| BiologyDate Added: 2022-05-21 In males, the sperm formation takes place in | ||
| BiologyDate Added: 2022-05-21 Kala-azar is caused by | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. Spirogyra divides into many daughter cells simultaneously by multiple fission. 2. Leishmania reproduce by binary fission. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. Hydra and Planaria can be cut into any number of pieces and each piece grows into a complete organism. 2. Regeneration and reproduction are same. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. Organisms such as Hydra use regenerative cells for reproduction in the process of budding. 2. Regeneration is carried out by specialised cells. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. Plants raised by vegetative propagation can bear flowers and fruits earlier than those produced from seeds. 2. All plants produced by vegetative propagation are genetically not similar enough to the parent plant. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Which of the following are the reproductive parts of a flower? 1. Sepals 2. Pistil 3. Petals 4. Stamens Choose the correct options? | ||
| BiologyDate Added: 2022-05-21 Ovary, style and stigma are present in | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. Stamen is the female reproductive part and it produces pollen grains that are yellowish in colour. 2. The male germ-cell produced by pollen grain fuses with the female gamete present in the ovule and gives the zygote. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 Which of the following ripens to form a fruit? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. The testes in males is located outside the abdominal cavity in scrotum because sperm formation requires a higher temperature than the normal body temperature. 2. Along the path of the vas deferens, glands like the prostate and the seminal vesicles add their secretions. Which of the following statements is/are correct? | ||
| BiologyDate Added: 2022-05-21 ______ can be regenerated after fragmentation. | ||
| BiologyDate Added: 2022-05-21 Among the following which body is made from the two layers of cells? | ||
| BiologyDate Added: 2022-05-21 The study of human evolution indicates that we all are related to one species that developed in _______ | ||
| BiologyDate Added: 2022-05-21 Bacteria inhabits in | ||
| BiologyDate Added: 2022-05-21 Who propounded the theory of evolution? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. All human chromosomes are paired. 2. Only girl child inherits an X chromosome from its mother. Which of the following statements above is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. In some animals, the temperature at which fertilised eggs are kept determines whether the animals developing in the eggs will be male or female. 2. In snails, individuals can change sex, indicating that sex is not genetically determined. Which of the following statements above is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. Each gene set is present as a single long thread of DNA 2. Each cell will have two copies of each chromosome, one each from the male and female parents. Which of the following statements above is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. Gregor Mendel proposed that four copies of genes controlling traits are present in sexually reproducing organism. 2. These genes may be identical, or may be different, depending on the parentage. Which of the following statements above is/are correct? | ||
| BiologyDate Added: 2022-05-21 Gregor Johann Mendel studied the inheritance of traits in | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. Analogous characteristics are set of features that are structurally similar and inherited from a common ancestor but perform different functions. 2. The mammals, birds, reptiles and amphibians have four limbs which is an example of homologous characteristics. Which of the following statements above is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. Homologous characteristics are a set of characteristics that perform similar functions but are structurally different. 2. The wings of bats and birds are an example of analogous characteristics. Which of the following statements above is/are correct? | ||
| BiologyDate Added: 2022-05-21 Consider the following statements: 1. Evolution can be said to 'progress' from 'lower' forms to 'higher' forms. 2. The evolution seems to have given rise to more complex body designs. Which of the following statements above is/are correct? | ||
| BiologyDate Added: 2022-05-21 The earliest human species, Homo sapiens can be traced from | ||