Why death of fish is more common during summer than in winter? It is because of (1) shortage of food (2) concentration of toxins (3) depletion of oxygen (4) spread of diseases

Why death of fish is more common during summer than in winter? It is because of (1) shortage of food (2) concentration of toxins (3) depletion of oxygen (4) spread of diseases
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depletion of oxygen
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Why death of fish is more common during summer than in winter? It is because of – (1) shortage of food (2) concentration of toxins (3) depletion of oxygen (4) spread of diseases

Description : Why death of fish is more common during summer than in winter? It is because of – (1) shortage of food (2) concentration of toxins (3) depletion of oxygen (4) spread of diseases

Last Answer : (3) depletion of oxygen Explanation: Fish die more in summer due to oxygen depletion which refers to low levels of dissolved oxygen (DO) in water. Warm water is much less ... because at high water temperatures their metabolic rates increase, hence their physiologic demand for oxygen increases.

In the depletion region of a pn junction, there is a shortage of ……..

Last Answer : In the depletion region of a pn junction, there is a shortage of Holes and electrons.

Several children at a summer camp were hospitalized with symptoms thought to be due to ingestion of food containing botulinum toxins. The effects of botulinum toxin are likely to include (a) Bronchospasm (b) Cycloplegia (c) Diarrhea (d) Skeletal muscle spasms (e) Hyperventilation

Description : Several children at a summer camp were hospitalized with symptoms thought to be due to ingestion of food containing botulinum toxins. The effects of botulinum toxin are likely to include (a) Bronchospasm (b) Cycloplegia (c) Diarrhea (d) Skeletal muscle spasms (e) Hyperventilation

Last Answer : Ans: B

Sudden mass death of fishes from oxygen depletion is more likely in case of:

Description : Sudden mass death of fishes from oxygen depletion is more likely in case of:

Last Answer : Sudden mass death of fishes from oxygen depletion is more likely in case of: A. Eutrophic lake B ... lake C. Oligotrophic lake D. Oxaltrophic lake .

During which season would the Aquaculturist be most likely to aerate (add oxygen to) a pond? [a] Summer [b] Fall [c] Spring [d] Winter [e] Autumn

Description : During which season would the Aquaculturist be most likely to aerate (add oxygen to) a pond? [a] Summer [b] Fall [c] Spring [d] Winter [e] Autumn

Last Answer : [c] Spring

A river with an inflow of domestic sewage rich in organic waste may result in (a) an increased production of fish due to biodegradable nutrients (b) death of fish due to lack of oxygen (c) drying of the river very soon due to algal bloom (d) increased population of aquatic food web organisms.

Description : A river with an inflow of domestic sewage rich in  organic waste may result in  (a) an increased production of fish due to  biodegradable nutrients (b) death of fish due to lack of oxygen ( ... of the river very soon due to algal bloom (d) increased population of aquatic food web  organisms.

Last Answer : (d) increased population of aquatic food web  organisms.

A river with an inflow of domestic sewage rich in organic waste may result in (a) an increased production of fish due to biodegradable nutrients (b) death of fish due to lack of oxygen (c) drying of the river very soon due to algal bloom (d) increased population of aquatic food web organisms.

Description : A river with an inflow of domestic sewage rich in organic waste may result in (a) an increased production of fish due to biodegradable nutrients (b) death of fish due to lack of oxygen (c) drying of the river very soon due to algal bloom (d) increased population of aquatic food web organisms.

Last Answer : (b) death of fish due to lack of oxygen

Which of the following diseases is spread through contaminated food? (1) Malaria (2) Tetanus (3) Typhoid (4) Mumps

Description : Which of the following diseases is spread through contaminated food? (1) Malaria (2) Tetanus (3) Typhoid (4) Mumps

Last Answer : (3) Typhoid Explanation: Typhoid fever is a disease that is caused by the bacteria Salmonella Typhi. Most people get typhoid fever by eating or drinking food or water that has been contaminated by ... disease, including by those who do not have any symptoms. Person-to-person spread can also occur.

Which of the following diseases is spread through contaminated food? (1) Malaria (2) Tetanus (3) Typhoid (4) Mumps

Description : Which of the following diseases is spread through contaminated food? (1) Malaria (2) Tetanus (3) Typhoid (4) Mumps

Last Answer : Typhoid

How would a shortage of oxygen affect mineral uptake?

Description : How would a shortage of oxygen affect mineral uptake?

Last Answer : What is the answer ?

Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N2 in contaminated air at which it acts as a natural asphyxiate is ≥ __________ percent. (A) 84 (B) 88 (C) 80 (D) 92

Description : Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N2 in contaminated air at ... asphyxiate is ≥ __________ percent. (A) 84 (B) 88 (C) 80 (D) 92

Last Answer : (A) 84

8. If pollutants are added continuously in a water body they will cause a) increase in BOD b) decrease in BOD c) death of all plants d) increase in oxygen concentration

Description : 8. If pollutants are added continuously in a water body they will cause a) increase in BOD b) decrease in BOD c) death of all plants d) increase in oxygen concentration

Last Answer : a) increase in BOD

Air over the oceans is colder in summer and warmer in winter compared with air over the continental regions. This is because (a) Water is translucent and has a relatively high heat capacity compared to dirt (b) Compared to dirt, a thicker layer of water participates in the seasonal cycle (c) The albedo of water is greater than that of land and thus reflects more solar radiation (d) Both A and B are true (e) The effect is due to the changes in circulation between continents and oceans

Description : Air over the oceans is colder in summer and warmer in winter compared with air over the continental regions. This is because (a) Water is translucent and has a relatively high heat capacity compared ... B are true (e) The effect is due to the changes in circulation between continents and oceans

Last Answer : (d) Both A and B are true

What practice should be used to prevent seafood toxins from causing a food illness?

Description : What practice should be used to prevent seafood toxins from causing a food illness?

Last Answer : Need answer

Which of the following is an advantage of food processing? A. Availability of seasonal food throughout the year B. Removal of toxins and preserving food for longer C. Adds extra nutrients to some food items D. All of the above

Description : Which of the following is an advantage of food processing? A. Availability of seasonal food throughout the year B. Removal of toxins and preserving food for longer C. Adds extra nutrients to some food items D. All of the above

Last Answer : D. All of the above

Agrochemicals are the most dangerous toxins as they circulate in a. Food chains b.Water bodies c. Environment d. Atmosphere

Description : Agrochemicals are the most dangerous toxins as they circulate in a. Food chains b.Water bodies c. Environment d. Atmosphere

Last Answer : a. Food chains

Which diseases are spread by mosquitoes?

Description : Which diseases are spread by mosquitoes?

Last Answer : Mosquitoes are known to spread a variety of diseases, some of the most common include: Malaria: a parasitic infection that affects the red blood cells and can cause fever, chills, and flu-like symptoms ... these diseases may not be present in all regions, and it may vary depending on the location.

Do toilet seats spread diseases They always seem so dirty!?

Description : Do toilet seats spread diseases They always seem so dirty!?

Last Answer : It is a myth that toilet seats spread diseases. They in fact have far fewer germs on them than sinks, kitchen counters, computer keyboards and dining tables.

Potato virus diseases are spread by

Description : Potato virus diseases are spread by

Last Answer : Ans. Aphids

If waste materials contaminate the source of drinking water, which of the following diseases will spread? (1) Scurvy (2) Typhoid (3) Malaria (4) Anaemia

Description : If waste materials contaminate the source of drinking water, which of the following diseases will spread? (1) Scurvy (2) Typhoid (3) Malaria (4) Anaemia

Last Answer : (2) Typhoid

If waste materials contaminate the source of drinking water, which of the following diseases will spread? (1) Scurvy (2) Typhoid (3) Malaria (4) Anaemia

Description : If waste materials contaminate the source of drinking water, which of the following diseases will spread? (1) Scurvy (2) Typhoid (3) Malaria (4) Anaemia

Last Answer : (2) Typhoid Explanation: Typhoid is a systemic infection caused by Salmonella Typhi, usually through ingestion of contaminated food or water. Typhoid is spread by eating or drinking food or water ... with the feces of an infected person. Risk factors include poor sanitation and poor hygiene.

_____ implies that if enough people in a population are immunized against certain diseases, then it is very difficult for those diseases to spread. a. Herd immunity b. Passive immunity c. Active immunity d. Natural immunity

Description : _____ implies that if enough people in a population are immunized against certain diseases, then it is very difficult for those diseases to spread. a. Herd immunity b. Passive immunity c. Active immunity d. Natural immunity

Last Answer : a. Herd immunity

If waste materials contaminate the source of drinking water, which of the following diseases will spread ? (1) Scurvy (2) Typhoid (3) Malaria (4) Anaemia

Description : If waste materials contaminate the source of drinking water, which of the following diseases will spread ? (1) Scurvy (2) Typhoid (3) Malaria (4) Anaemia

Last Answer : Typhoid

Ultraviolet radiation striking the earth is due to the depletion of – (1) carbon monoxide (2) carbon dioxide (3) ozone (4) oxygen

Description : Ultraviolet radiation striking the earth is due to the depletion of – (1) carbon monoxide (2) carbon dioxide (3) ozone (4) oxygen

Last Answer : (3) ozone Explanation: Ozone is a powerful oxidant (far more so than dioxygen) and has many industrial and consumer applications related to oxidation. This same high oxidizing potential, however, ... 100 parts per billion. This makes ozone a potent respiratory hazard and pollutant near ground level.

If the depletion of oxygen is found to be 2.5 mg/litre after incubating 2.5 ml of sewage diluted to 250 ml for 5 days at 20°C, B.O.D. of the sewage is A. 50 mg/l B. 100 mg/l C. 150 mg/l D. 250 mg/l

Description : If the depletion of oxygen is found to be 2.5 mg/litre after incubating 2.5 ml of sewage diluted to 250 ml for 5 days at 20°C, B.O.D. of the sewage is A. 50 mg/l B. 100 mg/l C. 150 mg/l D. 250 mg/l

Last Answer : ANS: D

If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is A. 50 ppm B. 100 ppm C. 150 ppm D. 200 ppm

Description : If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is A. 50 ppm B. 100 ppm C. 150 ppm D. 200 ppm

Last Answer : ANS: D

If 2% solution of a sewage sample is incubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D. of the sewage is A. 200 ppm B. 225 ppm C. 250 ppm D. None of these

Description : If 2% solution of a sewage sample is incubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D. of the sewage is A. 200 ppm B. 225 ppm C. 250 ppm D. None of these

Last Answer : ANS: C

If a 2% solution of sewage sample is incubated for 5 days at 20°C and the dissolved oxygen depletion was found to be 8 mg/l. The BOD of the sewage is A. 100 mg/l B. 200 mg/l C. 300 mg/l D. 400 mg/l

Description : If a 2% solution of sewage sample is incubated for 5 days at 20°C and the dissolved oxygen depletion was found to be 8 mg/l. The BOD of the sewage is A. 100 mg/l B. 200 mg/l C. 300 mg/l D. 400 mg/l

Last Answer : ANS: D

Which of the following actions have to be avoided to prevent the depletion of DO (dissolved oxygen) in aquaculture? [a] Over-aerating, over-warming, over-harvesting [b] Over-seining, over-planting, over-medicating [c] Over-feeding, over-stocking, over-fertilizing [d] None of these [e] All of the above

Description : Which of the following actions have to be avoided to prevent the depletion of DO (dissolved oxygen) in aquaculture? [a] Over-aerating, over-warming, over-harvesting [b] Over-seining, over-planting, over- ... c] Over-feeding, over-stocking, over-fertilizing [d] None of these [e] All of the above

Last Answer : [c] Over-feeding, over-stocking, over-fertilizing

Presence of soluble organics in polluted water causes (A) Undesirable plants growth (B) Depletion of oxygen (C) Fire hazards (D) Explosion hazards

Description : Presence of soluble organics in polluted water causes (A) Undesirable plants growth (B) Depletion of oxygen (C) Fire hazards (D) Explosion hazards

Last Answer : (B) Depletion of oxygen

Presence of non-biodegradable substances, like alkyl benzene sulphonate (ABS) from the detergents in polluted water stream causes (A) Fire hazards (B) Explosion hazards (C) Persistent foam (D) Depletion of dissolved oxygen

Description : Presence of non-biodegradable substances, like alkyl benzene sulphonate (ABS) from the detergents in polluted water stream causes (A) Fire hazards (B) Explosion hazards (C) Persistent foam (D) Depletion of dissolved oxygen

Last Answer : (C) Persistent foam

This cause the depletion of ozone layer by decomposing ozone to oxygen . a) CFC b)UV radiations c)CO2 d)O2

Description : This cause the depletion of ozone layer by decomposing ozone to oxygen . a) CFC b)UV radiations c)CO2 d)O2

Last Answer : b)UV radiations

Which one of the following is not a matter a global concern in the removal of tropical forests ? (A) Their ability to absorb the chemicals that contribute to depletion of ozone layer. (B) Their role in maintaining the oxygen and carbon balance of the earth. (C) Their ability to regulate surface and air temperatures, moisture content and reflectivity. (D) Their contribution to the biological diversity of the planet.

Description : Which one of the following is not a matter a global concern in the removal of tropical forests ? (A) Their ability to absorb the chemicals that contribute to depletion of ozone layer ... , moisture content and reflectivity. (D) Their contribution to the biological diversity of the planet.

Last Answer : (A) Their ability to absorb the chemicals that contribute to depletion of ozone layer.

Ultraviolet radiation striking the earth is due to the depletion of (1) carbon monoxide (2) carbon dioxide (3) ozone (4) oxygen

Description : Ultraviolet radiation striking the earth is due to the depletion of (1) carbon monoxide (2) carbon dioxide (3) ozone (4) oxygen

Last Answer : ozone

Which of the following secretes toxins during storage conditions of crop plants? (a) Aspergillus (b) Penicillium (c) Fusarium (d) Colletotrichum

Description : Which of the following secretes toxins during storage conditions of crop plants? (a) Aspergillus (b) Penicillium (c) Fusarium (d) Colletotrichum

Last Answer : (a) Aspergillus

Why is the flu common in the winter, but less common in the summer?

Description : Why is the flu common in the winter, but less common in the summer?

Last Answer : In climates that experience winter, the influenza virus tends to survive longer and transmit itself better in cold and dry conditions, which leads to more people contracting the flu during those colder months ... have to do with the immune system being weaker in the winter, contrary to some beliefs.

What led to maximum number of fatalities during Indonesian 2004 Earthquake? A. Death on account of openings on surface B. Fires generated due to earthquake C. Epidemic diseases D. Tsunami

Description : What led to maximum number of fatalities during Indonesian 2004 Earthquake? A. Death on account of openings on surface B. Fires generated due to earthquake C. Epidemic diseases D. Tsunami

Last Answer : D. Tsunami

World food shortage?

Description : World food shortage?

Last Answer : I’m not very concerned. I wouldn’t trust the media when they report things like this due to their affinity of blowing things out of proportion. When the American obesity statistics go down, then I’ll worry.

What is the main cause of food shortage

Last Answer : The main reason for food shortage is overpopulation.

Which of the following was not one of the consequences of the policy of exporting raw materials and food grains from India to Britain? [IAS 2003] (a) It raised the prices of raw materials (b) It brought enormous profits to unscrupulous businessman (c) It led to agricultural shortage and famines (d) It denuded the country of her agricultural surplus

Description : Which of the following was not one of the consequences of the policy of exporting raw materials and food grains from India to Britain? [IAS 2003] (a) It raised the prices of raw materials (b) ... (c) It led to agricultural shortage and famines (d) It denuded the country of her agricultural surplus

Last Answer : Ans: (c)

In overpopulated parts of the world where there is shortage of food, the inhabitants should feed predominantly on - (a) rice, wheat and other food grains (b) herbivores (c) small carnivores (d) large carnivores

Description : In overpopulated parts of the world where there is shortage of food, the inhabitants should feed predominantly on - (a) rice, wheat and other food grains (b) herbivores (c) small carnivores (d) large carnivores

Last Answer : Ans:(a)

Give reason: a) Soda bottles are often labelled “store in cool and dry place”. b) Balloons pops out during hot summer more frequently than in winter. c) During winter football filled with air reduces to its original size when taken outdoors.

Description : Give reason: a) Soda bottles are often labelled “store in cool and dry place”. b) Balloons pops out during hot summer more frequently than in winter. c) During winter football filled with air reduces to its original size when taken outdoors.

Last Answer : a) Soda bottles are often labelled store in cool and dry place . The carbon dioxide filled in soda bottles on exposure to heat, expands because the gas inside the bottle expands as temperature ... . When football is taken out, its temperature decreases so the volume to gas filled also decreases.

The extreme of temperature between summer and winter is quite low in southern part of Peninsular India mainly because: (a) the adjoining oceans moderate the temperature (b) the sky is generally cloudy (c) The sun's rays are almost vertical throughout the year (d) strong winds flow throughout the year shop.ssbcrack.com

Description : The extreme of temperature between summer and winter is quite low in southern part of Peninsular India mainly because: (a) the adjoining oceans moderate the temperature (b) the sky is generally ... are almost vertical throughout the year (d) strong winds flow throughout the year shop.ssbcrack.com

Last Answer : Ans: (a)

In a railway track, two rails are joined end to end with a gap in between them because – (1) steel can be saved (2) accidents due to contraction in winter can be avoided (3) air-gaps are necessary for bearing the weight of running train (4) accidents due to expansion in summer can be avoided.

Description : In a railway track, two rails are joined end to end with a gap in between them because – (1) steel can be saved (2) accidents due to contraction in winter can be avoided (3) air-gaps are necessary for bearing the weight of running train (4) accidents due to expansion in summer can be avoided.

Last Answer : (4) accidents due to expansion in summer can be avoided. Explanation: The volume of materials changes depending on current temperature. Usually heat makes them expand, and cold leads them to contract. ... on the tracks. The same applies in many other fields of engineering, i.e. bridge building.

In a railway track, two rails are joined end to end with a gap tin between them because? A. Steel can be saved B. Accidents due to contraction in winter can be avoided C. Air gaps are necessary for bearing the weight of running train D. Accidents due to expansion in summer can be avoided (Answer) E. All of these

Description : In a railway track, two rails are joined end to end with a gap tin between them because? A. Steel can be saved B. Accidents due to contraction in winter can be avoided C. Air gaps are necessary ... of running train D. Accidents due to expansion in summer can be avoided (Answer) E. All of these

Last Answer : D. Accidents due to expansion in summer can be avoided (Answer)

In temperate climates, pruning should not be done near the end of the summer because: a. New growth will not harden before winter b. It may increase foliage disease c. Plants will not recover in time to produce new growth before winter d. Sever “bleeding” from the cuts will kill the plant

Description : In temperate climates, pruning should not be done near the end of the summer because: a. New growth will not harden before winter b. It may increase foliage disease c. Plants will not recover in time to produce new growth before winter d. Sever “bleeding” from the cuts will kill the plant

Last Answer : New growth will not harden before winter

The calorie requirement of the body increases in winter as compared to summer because ore calories are necessary to

Description : The calorie requirement of the body increases in winter as compared to summer because ore calories are necessary to

Last Answer : Sustain body temperature

Diurnal variation of magnetic declination is (A) Greater at equator than nearer the poles (B) Less at equator than nearer the poles (C) Less in summer than in winter (D) Same at all latitudes and during different months

Description : Diurnal variation of magnetic declination is (A) Greater at equator than nearer the poles (B) Less at equator than nearer the poles (C) Less in summer than in winter (D) Same at all latitudes and during different months

Last Answer : (B) Less at equator than nearer the poles

Hyperimmune serum is serum with a higher than normal level of _____. a. antigens b. antibodies c. toxins d. immune cells

Description : Hyperimmune serum is serum with a higher than normal level of _____. a. antigens b. antibodies c. toxins d. immune cells

Last Answer : b. antibodies

Summer squash diseases

Description : Summer squash diseases

Last Answer : Need Answer