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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
| 3151. |
Impact of the biotic components on the ecosystem. |
| Answer» <p>Biotic factors</p><p>Biotic factors are all the biological conditions of an environment for a specie/taxa. It can include prey and predator abundance, available food amount, available space, intra and interspecific competition.</p><p>The development of organims is under the control of abiotic factors. Some are adapted to heat, cold etc. The abiotic factors will define which organisms are able or not to live in a specified place.</p><p>The living organisms will constitute the biotic factors, which define if and how can an organism live in a specified environment.</p><p>So, the abiotic factors are controling the biotic factors of an environment.</p> | |
| 3152. |
3. Name the biotic components of a habitat. |
| Answer» <p>Biotic components are the living things that shape an ecosystem. Examples of biotic components include animals, plants, fungi, and bacteria.</p> | |
| 3153. |
(c) Discuss abiotic and biotic componentsofanecosystem.4 |
| Answer» <p>Biotic Factors in an EcosystemsIn an ecosystem, biotic factors include all the living parts of the ecosystem. A healthy woodland ecosystem contains producers like grasses and trees, as well as consumers ranging from mice and rabbits to hawks and bears. The biotic components of an ecosystem also encompass decomposers like fungus and bacteria. A healthy aquatic ecosystem includes producers like algae and phytoplankton, consumers like zooplankton and fish, and decomposers like bacteria. Specific biotic categories include:</p><p>Plants:Most ecosystems depend on plants to perform photosynthesis, making food from water and carbon dioxide in the ecosystem. In ponds, lakes and the ocean, many of the plants are grasses, algae or tiny phytoplankton floating on or near the surface. Also in this category are the chemosynthetic bacteria that live at deep ocean vents, which form the base of that food chain.</p><p>Animals:First-order consumers like mice, rabbits and seed-eating birds as well as zooplankton, snails, mussels, sea urchins, ducks and black sharks eat the plants and algae. Predators like coyotes, bobcats, bears, killer whales and tiger sharks eat first-order consumers. Omnivores like bears and rotifers (nearly microscopic aquatic animals) eat both plants and animals.</p><p>Fungi:Fungi like mushrooms and slime molds feed off the bodies of living hosts or break down the remains of once-living organisms. Fungi serve an important role in the ecosystem as decomposers.</p><p>Protists:Protists generally are one-celled microscopic organisms, and they are sometimes overlooked in the ecosystem. Plant-like protists use photosynthesis, so they are producers. Animal-like protists such as paramecia and amoebas eat bacteria and smaller protists, so they form part of the food chain. Fungus-like protists often serve as decomposers in the ecosystem.</p><p>Bacteria:In deep-sea vents, chemosynthetic bacteria fill the role of producers in the food chain. Bacteria act as decomposers, breaking down dead organisms to release nutrients. Bacteria also serve as food for other organisms.</p> <p>.</p><p>Abiotic Factors in an Ecosystem</p><p>The abiotic factors in an ecosystem include all the nonliving elements of the ecosystem. Air, soil or substrate, water, light, salinity and temperature all impact the living elements of an ecosystem. Specific abiotic factor examples and how they may affect the biotic portions of the ecosystem include:</p><p>Air:In a terrestrial environment, air surrounds the biotic factors; in an aquatic environment, the biotic factors are surrounded by water. Changes in the chemical composition of the air, like air pollution from cars or factories, impacts everything that breathes the air. Some organisms are more sensitive to changes in the air. For aquatic organisms, both the chemical composition of the air and water but also the quantity of air and water impact anything living in the water. For example, when algal blooms become excessive, the algae reduce the oxygen in the water, and many fish suffocate.</p><p>Soil or Substrate:Most plants need soil for nutrients and to hold themselves in place with their roots. Plants in areas with nutrient-poor soils often have adaptations to compensate, like the insect-capturing Cobra Lily and Venus Fly-trap. Soil or substrate also impact animals, such as the filter-feeding nudibranchs whose gills would be clogged if the substrate suddenly included fine particles of sand and silt.</p><p>Water:Water is essential for life on Earth. Water is essential to the chemical reactions within living organisms, is one of the key components for photosynthesis and is the placeholder in cells. Water also serves as a living environment for aquatic creatures. As such, changes in quantity and quality of water impact living systems. Water also has mass, creating pressure in aquatic environments. Water's ability to hold temperature moderates temperature changes within its mass and in nearby areas. For example, heat from the equator moved to higher latitudes by ocean currents results in milder climates for the affected areas. Differences in rainfall mean the difference between desert and forest biomes. Clouds can even be the controlling factor in some ecosystems, such as the cloud forests of the tropics where plants draw their moisture from the air.</p><p>Light:Lack of light in the deeper ocean prevents photosynthesis, meaning that the majority of life in the ocean lives near the surface. Differences in daylight hours impact temperatures at the equator and the poles. The day-night rhythm of light impacts life patterns, including reproduction, for many plants and animals.</p><p>Salinity:Animals in the ocean are adapted to the salinity, using a salt renal gland to control the salt content of their bodies. Plants in high-salinity environments also have internal mechanisms to remove the salt. Other living creatures without these mechanisms die from too much salt in their environment. The Dead Sea and Great Salt Lake are two examples of environments where salinity has reached levels that challenge most living organisms.</p><p>Temperature:Most organisms require a relatively stable temperature range. Mammals even have internal mechanisms to control their body temperature. Temperature changes, especially extreme and sudden changes, that go beyond an organism's tolerance will harm or kill the organism. Temperature changes can be natural, due to sunspots, weather-pattern shifts or ocean upwelling, or can be artificial, as with cooling-tower outfall, released water from dams or the concrete effect (concrete absorbing heat).</p> <p>thank you</p> | |
| 3154. |
How are the abiotic and biotic components inter-dependent?Write short notes on the bioticcomponents of nature. |
| Answer» <p>Biotic componentsorbiotic factors,can be described as any living component that affects anotherorganism, or shapes theecosystem. This includes both animals that consume other organisms within their ecosystem, and the organism that is being consumed. Biotic factors also include human influence,pathogens, anddisease outbreak. Each biotic factor needs the proper amount of energy and nutrition to function day to day.</p><p>Biotic components are typically sorted into three main categories:</p><p>Producers, otherwise known as autotrophs, convert energy (through the process of photosynthesis) into food.Consumers, otherwise known as heterotrophs, depend upon producers (and occasionally other consumers) for food.Decomposers, otherwise known as detritivores, break down chemicals from producers and consumers (usually antibiotic) into simpler form which can be reused..</p> | |
| 3155. |
Explain the interaction and interdependency ofbiotic and abiotic parts of nature |
| Answer» <p>An ecosystem consists of both living and non-living components. The abiotic or the non-living components includes soil, water, light, inorganic substances. The biotic components of the ecosystem are the producers and the consumers.</p><p>All living organisms including humans survive and depend on the resources in their environment. The resources in the environment include the biotic and the abiotic factors. The rate of growth of population of any species is affects the environmental factors. In turn, these environmental factors are affected by the size and growth rate of the population. The growth of population in a region is limited to the carrying capacity of the ecosystem. It is the amount of life any ecosystem can support with the available space, energy, water and food.</p><p>Example of interdependence of biotic and abiotic components: The interdependency of the abiotic components like air, water, temperature, soil, etc and the biotic components like trees and living organisms are related. The process of photosynthesis takes place in green plants in the presence of sunlight. The green plants act as the primary producers and are vital for the survival of the organisms further in the tropic level. Without sunlight, the process of photosynthesis does not take place; in absence of photosynthesis, no food can be produced, and the primary consumers do not have food for their survival, this breaks the whole food web relationship that is from the producers to the herbivores and herbivores to the carnivores in the ecosystem.</p><p>Another example of interdependence of biotic and abiotic components is the relationship between the soil and plant nutrition. If there is no soil then the plants cannot get nitrogen for their nutrition and survival. Nitrogen is the key component in the vital metabolism mechanisms and nitrogen is also a main component in the composition of amino acids and proteins and also nucleic acids such as DNA and RNA.</p><p>Another important factor that shows interdependence if the living and non-living component is seen on the relationship between water and the life. Water is the basis of life; almost 70% of human body is made of water. There is no chance of life without water.</p><p>The abiotic components also show dependence on biotic components. The decomposers make the soil nutritious by the process of decomposition. The decomposers like the saprophytic bacteria and fungi feed on organic dead and decayed matter and decompose them into simpler nutrients and inorganic matter.</p> | |
| 3156. |
14*x^2 %2B 9*x %2B 1 |
| Answer» <p>value of x=-1/7 or -1/2 </p> <p>value of x=-1/7 or 1/2</p> <p>(7x+1)(2x+1) is the correct answer of the given question</p> <p>(7x+1)(2x+1) is the correct answer </p> | |
| 3157. |
3.Name a natüpäl Inu4.What is the use of antacid? |
| Answer» <p>It is used to cure acidity.</p> <p>antacid is used to neturalize stomach acidity as they are basic in nature that neturalize with acid.</p> | |
| 3158. |
2SPIThe diameter of zinc atom is 2.6 A. Calculate :(a) the radius of %inc atom in pm(b) number of atoms present in a length of 1.6 cm if thezinc atoms are arranged side by side length wise.ISE 2.37 |
| Answer» | |
| 3159. |
State and prove Gauss theorem in electrostatics |
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| 3160. |
State and prove Gauss' theorem in electrostatics. |
| Answer» <p>2</p> <p>3</p> | |
| 3161. |
Q2. State reason for the following:Small amount of acid is added to water during electrolysis of wateropium chloride is dissolved in water in a test tube, the test tube becomesB. When ammonium chloride is dissolved inC. Paint is applied on Iron articles. |
| Answer» <p>Answer C. because to stop rusting</p> <p>Answer C. because to stop rusting </p> <p>answer C. because to stop rusting</p> <p> option C is the correct answer.</p> <p>option C is right because to stop rusting</p> <p>option c because to stop rusting</p> | |
| 3162. |
Define electric flux. State and prove Gauss theorem.. |
| Answer» <p>Gauss'slaw states that the netfluxof anelectricfield through a closed surface is proportional to the enclosedelectriccharge. Theelectric fluxisdefinedas theelectricfield passing through a given area multiplied by the area of the surface in a plane perpendicular to the field.</p> | |
| 3163. |
Aman travelled a distance ě, $4200 cmin n uets ind t |
| Answer» <p>converting 7084200 into km,distance=70.842kmtime=1.2 hoursspeed=distance/time=70.842/1.2=59 km/hr</p> | |
| 3164. |
The volume of a liquid flowing out per second of a pipe of length l and radius r is given by V=\frac{\pi}{8} \frac{P_{\gamma}^{1}}{\eta l} |
| Answer» <p>Volume per sec = L^3 T^-1Now according to above equationV= P r^4 / ( neta ) l</p><p>=( M L^-1 T^-2 ) ( L^4 )-------------------------------( M L^-1 T^-1 ) ( L )</p><p>= L^3 T^-1</p> <p>what happened to 180/8</p> | |
| 3165. |
The pressure inside a liquid of density d at a depthh' below its surface is:II. |
| Answer» <p>Where is the below data?</p> | |
| 3166. |
. Multiply:(i) 16 by 9(v) -53 by 18 5(ix) â-105 by -8o~ < |
| Answer» <p>16 × 9 = 144 -53 × 8 = -424 -105 × -8 = 840 </p> <p>how is light scattered by the air??</p> | |
| 3167. |
2. What is the slope of the body when it moves with uniform velocity?(d) may be positive(a) positive(c) negative(b) zeronegative |
| Answer» <p>option d is the following question answer. </p> <p>D is the answer of the followingWhen thebodyis moving with theuniform velocity, theslopecan either be positive or negative. This is because distance can be increased with the time or decreased with the time depending on the situation. Due to increase or decrease in the distance, it can be positive or negative.</p> <p>option A is correct option. </p><p>plz help me by liking my ans 😊😊😊😊</p> <p>When the body is moving with the uniform velocity, the slope can either be positive or negative. </p><p>This is because distance can be increased with the time or decreased with the time depending on the situation. </p><p>Due to increase or decrease in the distance, it can be positive or negative.</p> <p>Answer:</p><p>the slope which you might mean is the position time slope which means a constant slope as it corresponds to the velocity.</p> <p>Answer:</p><p>the slope which you might mean is the position time slope which means a constant slope as it corresponds to the velocity.</p> <p>it's Dit may be positive or negative</p> <p>d is the correct answer </p> <p>it may be positive or negative </p> <p>it's may be positive or negative</p> | |
| 3168. |
Which part of the brain maintains posture and equilibrium of the body? |
| Answer» | |
| 3169. |
3.Which part of the brain maintains posture and equilibrium of the bodty |
| Answer» | |
| 3170. |
what is posture? |
| Answer» <p>Posture is the position in which someone holds their body when standing or sitting.</p> | |
| 3171. |
How are we dependant on nature for all our needs?1. |
| Answer» <p>Our food, our water, our livelihoods — they all come from nature.</p><p>Healthy ecosystems cleanourwater, purifyourair, maintainoursoil, regulate the climate, recycle nutrients and provide us with food. They provide raw materials and resources for medicines and other purposes. They are at the foundation of all civilisation and sustainoureconomies.</p> | |
| 3172. |
Which part of he yn maintains posture and equitbrium of the boty? |
| Answer» <p>cerbellum</p> | |
| 3173. |
Answer the following questions.How are we dependant on nature for all our needs?What is the web of life? What does it tell us? |
| Answer» <p>Ans :- Humans are dependent on nature for many things. We use nature to support our own well being, yet most to remind us of how nature provides our everyday necessities.</p> | |
| 3174. |
Total suspended solids (T.S.S) are mostly responsible fora Turbidityc) Odourb) Colourd) Taste |
| Answer» <p>TurbidityandTSSare themostvisible indicatorsofwater quality.</p><p>The turbidity of water is based on the amount of light scattered by particles in the water column2. The more particles that are present, the more light that will be scattered. As such, turbidity and total suspended solids are related. However, turbidity is not a direct measurement of the total suspended materials in water. Instead, as a measure of relative clarity, turbidity is often used to indicate changes in the total suspended solids concentration in water without providing an exact measurement of solids1.</p> <p>Dreyfus JFTGVZGVYJJ Gjhgy ugh tivr agar aap vjh C and tge</p> | |
| 3175. |
tch the following:a. Bathroomb. Dressing roomC. Bedroomd. Kitchene. StoreroomLadd |
| Answer» <p>1.d2.a3.e4.c5.b are the answers</p> <p>1st to d2nd to a3rd to e4th to c5th to b</p> <p>So herei am directly writing the answerthanks</p><p>1st to d2nd to a3rd to e4th to c5th to b</p> <p>1d2a3e4c5b is a right answer. </p> <p>1.d2.a3.e4.c5.b this is the correct answer</p> <p>1— d</p><p>2— a</p><p>3— e</p><p>4— c</p><p>5— b</p> <p>1. 42. 13. 54. 35. 2</p> <p>Cooker = kitchen Towel =bathroom Suitcase = store roomBed = Bed roomDressing table =dressing room</p> <p>Cooker is used in Kitchen</p><p>Towel is used in Bathroom</p><p>Suitcase is used in Store Room</p><p>Bed is used in Bed Room</p><p>Dressing table is used in Dressing Room</p> <p>1=d 2=a3=e 4=c5=b ok</p> | |
| 3176. |
What are nutrients |
| Answer» <p>A nutrient is a substance used by an organism to survive, grow, and reproduce. The requirement for dietary nutrient intake applies to animals, plants, fungi, and protists</p> | |
| 3177. |
(a) What are nutrients? |
| Answer» <p>Nutrientsare molecules in food that all organisms need to make energy, grow, develop, and reproduce. Nutrients are digested and then broken down into basic parts to be used by the organism.</p> <p>wrong</p> | |
| 3178. |
8.Explain how deforestation leads to reduced rainfall |
| Answer» <p>Cutting down trees decrease soil fertility</p> <p> thank you</p> | |
| 3179. |
(a) Deforestation leads to desertification |
| Answer» | |
| 3180. |
Write short notes on: i) free Oscillation. ii) Damped oscillation. |
| Answer» | |
| 3181. |
MagnetostrictionOscillator |
| Answer» <p>Principle</p><p>It works under the principle of Magnetostriction effect.</p><p>When a ferromagnetic rod is kept in an alternating magnetic field the rod is set into longitudinal vibrations, this happens due to change in the length of the rod.</p><p>This longitudinal vibrations, result in the formation of ultrasonic waves at resonance.</p><p>Resonance is the condition at which the frequency of the oscillator match with the natural frequency of rod.</p><p>Working:</p><p>1) The rod is initially magnetized by the DC power supply.</p><p>2) When the battery is initially switched on the current is induced in the transistor.</p><p>3) The transistor is properly biased.</p><p>4) Emitter- forward biased, Collector- reverse biased.</p><p>5) An emf is induced in coil L1, this induces an emf to coil L2 & a part of it is feed as input to the base. Hence, this feedback system makes transistor operates continuously.</p><p>6) The varying frequency can be obtained by altering the capacitance value of condenser.</p><p>7) At resonance Ultrasonic waves will be produced.</p><p>Natural frequency of rod= Frequency of oscillator circuit</p> | |
| 3182. |
What is the need for a system of control and coordination in an organism? |
| Answer» | |
| 3183. |
1.What is heartbeat? |
| Answer» <p>One pulsation of heart is called as heart beat.We could also that one contraction and expansion of heart is called as heart beat.</p> <p>The pulsation of heart is known as heart beat </p> <p>The pulsation of heart is known as heart beat </p> | |
| 3184. |
3. When you run, your breathing becomes faster as you need more oxygen. But why does yourrate of heartbeat also increase? |
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| 3185. |
when P and Q two element combine to each other then they form P2Q3 and PQ2. If 15.9 gm and 0.15 mole PQ2 having weight 9.3 gm then calculate the atomic weight of P&Q. |
| Answer» <p>thankx</p> | |
| 3186. |
4. Locate the centre of mass of a system of threeparticles of masses 1.0 g, 2.0 g and 3.0 g placed at thecorners of an equilateral triangle of 1 metre side. |
| Answer» <p>1</p> <p>2</p> | |
| 3187. |
A metal hydroxide of molecular formula MOHis 50% ionised. Its 0.0025M solution will have thepH |
| Answer» <p>Thank u for the answer </p> | |
| 3188. |
1 What is the heating effect of electric current? |
| Answer» | |
| 3189. |
diagram of electric bell |
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| 3190. |
Describe the construction and working ofan electric bell with the help of a diogram. |
| Answer» <p>The construction of an electric bell: </p><p>The construction of an electric bell consists of a gong, an electromagnet, a soft iron rod and a contact screw. </p><p>The working of an electric bell: </p><p>When the current passes through the electromagnet, it becomes magnetized which helps to attract the armature and after this the hammer raids and attract the armeture. At that time, electromagnet didn’t behave as a magnet because of the breaking contact with the screw. So, again armeture comes down to make the contact with the screw. This cycle keeps on repeating.</p> | |
| 3191. |
3 Electric bell works on which principle?(A) Magnetic field(C) Electric Inductiont) Electric current(D) Magnetic Induction |
| Answer» <p>D) Magnetic induction</p><p>Electromagnetic electric bell is made by the principle of electromagnetic inducton</p> | |
| 3192. |
anel densin |
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| 3193. |
6. Differentiate between parasitic and saprophytic plants. |
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| 3194. |
3.Differentiate between parasitic and saprophytic plants |
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| 3195. |
Kanetanel densit |
| Answer» | |
| 3196. |
14.1 WHAT IS A GOOD SOURCE OF ENERGY? |
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| 3197. |
14.1 WHAT IS A GOOD SOURCE OF ENERGY |
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| 3198. |
Permanent hardness of water is caused by(A)Ca(HCO3)2(B) MgSO4(C) Mg(HCO3)2(D) NaCi |
| Answer» <p>option A is the answer</p> | |
| 3199. |
Sorting materials into a groupShort Define:-1) Hardness2) Colour |
| Answer» <p>1) Hardness:hardness is another property of materials. Some materials are very hard while some are very soft.Material which are difficult to compress are called hard, e.g. diamond, stone, wood, steel, etc. Diamond is the hardest natural substance.</p><p>2)Appearance:Different materials look different from each other. The appearance depends on colour, hardness, texture, and lustre.</p> | |
| 3200. |
(a) What is hardness? How it is determined by EDTA method? Explain. |
| Answer» <p>Water “hardness” refers to the amount calcium and magnesium dissolved in the water. The “harder” the water (the more minerals are dissolved in it) the quicker mineral deposits build-up in water pipes and tanks that it runs through, requiring more frequent maintenance. Hot water pipes and boilers are particularly susceptible to mineral build-up. This is why water is often “softened” by removing a percentage of the minerals from the water.EDTA is an acid used to dissolve “limescale,” which is a kind of mineral made primarily of calcium carbonate that often builds up over time in water pipes, tanks, etc. The EDTA method involves titrating EDTA into a sample of water. The amount of EDTA required to fully react with all of the dissolved calcium in the water can be used to determine the “hardness” of the water.</p> | |