Consider the following statements concerning food chains. A. Removal of 80% tigers from an area resulted in greatly increased growth of vegetation. B. Removal of most of the carnivores resulted in an increased population of deers. C. The length of food chains is generally limited to 3-4 trophic levels due to energy loss. D. The length of food chains may vary from 2 to 8 trophic levels. Which two of the above statements are correct? (a) A, D (b) A, B (c) B, C (d) C, D

Consider the following statements concerning food
chains.
A. Removal of 80% tigers from an area resulted in
greatly increased growth of vegetation.
B. Removal of most of the carnivores resulted in an
increased population of deers.
C. The length of food chains is generally limited to
3-4 trophic levels due to energy loss.
D. The length of food chains may vary from 2 to 8
trophic levels.
Which two of the above statements are correct?
(a) A, D (b) A, B
(c) B, C (d) C, D
by

1 Answer

Answer :

(c) B, C
by

Related questions

Study the following statements regarding food chains and select the correct ones. (i) Removal of 80% tigers from an area resulted in greatly increased

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Which of the following statements concerning abnormalities of the haemoglobin molecule is true? 1) Alpha thalassaemia is due to a deficiency of beta-chain production 2) HbS is caused by a single base mutation on the beta-chain 3) genes for the alpha and beta chains are located on the same chromosome 4) in thalassaemia persistance of HbF is an adverse prognostic sign 5) oliguneoclitide probes may assist in the diagnosis of haemoglobinopathies

Description : Which of the following statements concerning abnormalities of the haemoglobin molecule is true? 1) Alpha thalassaemia is due to a deficiency of beta-chain production 2) HbS is caused by a ... is an adverse prognostic sign 5) oliguneoclitide probes may assist in the diagnosis of haemoglobinopathies

Last Answer : Answers-2 Alpha Thalassaemia is due to abnormalities of the alpha chain. Persistence of HbF has survival advnatages in severely affected subjects. C-alpha 16, beta 11. e-Hb electrophoresis(Dr Shu Ho)

Which of the following statement(s) is/are true concerning metabolic derangements in sepsis and the systemic inflammatory response syndrome which may follow progressive shock? a. Alterations in glucose metabolism lead to the development of efficient substrate utilization b. A progressive rise in serum triglyceride levels result from less efficient clearance and increased hepatic lipogenesis c. A net negative nitrogen balance occurs due to the oxidative metabolism of proteins to meet energy needs d. The serum aromatic amino acids fall rapidly as they are actively used in oxidative metabolism

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Last Answer : Answer: b, c A broad spectrum of metabolic abnormalities become apparent in sepsis and the systemic inflammatory response syndrome following shock. Disruption of the normal cycles of carbohydrate, ... acetyl coenzyme A. This results in reduced serum level of leucine, isoleucine and valine

Most hormone receptors are localized on the cell membrane and transduce hormone binding into altered levels of intracellular messengers. A limited number of intracellular receptors do exist. Which of the following statement(s) is/are true concerning intracellular receptors? a. The messengers or hormones must by lipophilic b. These intracellular receptors generally regulate protein synthesis c. The intracellular receptors are located entirely in the nucleus of the cell d. A heat-shock protein serves as an inhibitor protein blocking the DNA-binding domain of the steroid receptor

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Why are the numbers of trophic levels limited?

Description : Why are the numbers of trophic levels limited?

Last Answer : At each trophic level in a food chain, a large portion of theenergy is utilized for the maintenance of organisms which occur atthat trophic level and lost as heat. As a result of this, organismsin each trophic level pass on less and less energy to the nexttrophic levels, than they receive.

Why are the numbers of trophic levels limited?

Description : Why are the numbers of trophic levels limited?

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Why can food chains be longer in trophic regions than in tundra regions?

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Last Answer : Need answer

The torque and current curves for a three-phase induction motor with a cage rotor, are shown in the illustration. Which of the following statements is true concerning the depicted curves? EL-0056 A. As slip increases, rotor reactance decreases. B. The pullout point on the torque curve is about seven times the normal full load torque value. C. At stand still, stator current is 150% of normal. D. If the motor is loaded to the point where 40% slip has resulted, it will stall.

Description : The torque and current curves for a three-phase induction motor with a cage rotor, are shown in the illustration. Which of the following statements is true concerning the depicted curves? EL-0056 A. As slip ... D. If the motor is loaded to the point where 40% slip has resulted, it will stall.

Last Answer : Answer: D

Which of the following statement(s) is/are true concerning the neuroendocrine responses to shock? a. Sympathetic nerve endings release epinephrine which is responsible for greater than 80% of systemic vascular resistance b. Endogenous epinephrine is the primary contributor to systemic vascular resistance c. Increased pancreatic secretion of glucagon contributes to glucose intolerance associated with injury and sepsis d. The renin-angiotensin axis further augments the sympathetic-mediated vasoconstriction

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A 55-year-old male undergoes a total abdominal colectomy. Which of the following statement(s) is/are true concerning the hormonal response to the surgical procedure? a. Adrenocorticotropic hormone (ACTH) is secreted from the anterior pituitary gland b. ACTH stimulation results in elevation of serum cortisol levels for up to a week after the operation c. An increased secretion of aldosterone and ADH may contribute to postoperative fluid retention d. An increase in serum insulin and a fall in glucagon accelerate hepatic glucose production and maintain gluconeogenesis

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Actual operating speed of a ball mill may vary from 65 to 80% of the critical speed. Which of the following duties would require the ball mill to be operated at maximum percentage of critical speed? (A) Wet grinding in low viscous suspension (B) Wet grinding in high viscous suspension (C) Dry grinding of large particles (upto 1.25 cms) (D) Dry grinding of large particles in un-baffed mills

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Last Answer : (D) Dry grinding of large particles in un-baffed mills

Consider the following statements (A – D) each with one or two blanks. (A) Bears go into (1) during winter to (2) cold weather. (B) A conical age pyramid with a broad base represents (3) human population. (C) A wasp pollinating a fig flower is an example of (4) . (D) An area with high levels of species richness is known as (5) .

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Soil erosion can be prevented by – (1) Increasing bird population (2) Afforestation (3) Removal of vegetation (4) Overgrazing

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Soil erosion can be prevented by (1) Increasing bird population (2) Afforestation (3) Removal of vegetation (4) Overgrazing

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Last Answer : Afforestation

An autotransformer is equipped with a 50% tap, a 65% tap, and an 80% tap. Which of the following statements is true concerning a load connected to the 50% tap? A. The load is receiving minimum voltage and minimum current. B. The load is receiving minimum voltage and maximum current. C. The load is receiving maximum voltage and minimum current. D. The load is receiving maximum voltage and maximum current.

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Why does earths temperature vary greatly during the day while it and ocean temperature varies only slightly?

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Do stars vary greatly in size and color only.?

Description : Do stars vary greatly in size and color only.?

Last Answer : No. Stars vary in lots of aspects, including:* Diameter* Mass* Color (and the related surface temperature)* Chemical composition* Density (related to mass and diameter)* Brightness

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Description : Do stars vary greatly in size and color only.?

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The following statement(s) is/are true concerning initial microbiologic diagnostic techniques. a. Appropriate expeditious transport of specimens to the microbiology laboratory is essential for obtaining accurate clinical information b. The use of potassium hydroxide in preparing a specimen slide for light microscopy will be useful in identification of anaerobic bacteria c. Antibiotic sensitivity is determined by exposing the specific microorganism to varying amounts of antibiotic with the concentration of the antibiotic inhibiting growth referred to as the MIC (minimal inhibitory concentration) d. Serum levels of antimicrobial agents should achieve in excess of a 4-to 8-fold increase over the MIC to be considered clinically efficacious.

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Which one of the following animals may occupy more than one trophic levels in the same ecosystem at the same time? (a) Sparrow (b) Lion (c) Goat (d) Frog

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Patricia Welch, the Sinologist, identifies the Babao or Eight Treasures of Chinese cuisine as bear’s paw, deer’s tail, lark’s tongue, torpedo roe, monkey’s lip, carp’s tail and beef marrow. The missing element is typically braised in ****. It lends its title to one of Kipling’s Just So Stories. People easily embarrassed by the rude implications of the term may prefer to call it a gibbosity. What is the Eighth Treasure?

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Last Answer : Camel’s hump.

A 59-year-old trauma patient has suffered multiple septic complications including severe pneumonia, intraabdominal abscess, and major wound infection. He has now developed signs of multisystem organ failure. Which of the following statement(s) is/are true concerning necessary changes to be made in his nutritional management? a. Carbohydrate load should be reduced in the face of respiratory failure b. In patients with renal failure, protein intake should be diminished c. During hemodialysis protein intake should be limited to the same extent d. In patients with hepatic failure, carbohydrate load should be increased

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What are trophic levels? Give an example of a food chain and state the different trophic levels in it. -Biology

Description : What are trophic levels? Give an example of a food chain and state the different trophic levels in it. -Biology

Last Answer : Each step or level of the food chain forms a trophic level. Consider the following food chain:

What are trophic levels ? Give an example of food chain and state the different trophic levels in it. -Biology

Description : What are trophic levels ? Give an example of food chain and state the different trophic levels in it. -Biology

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The concentration of DDT in the food chain, from lower to higher trophic levels:

Description : The concentration of DDT in the food chain, from lower to higher trophic levels:

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The concentration of DDT in the food chain, from lower to higher trophic levels:

Description : The concentration of DDT in the food chain, from lower to higher trophic levels:

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Assertion (A) : In a food chain members of successive higher levels are fewer in number. Reason (R ): Number of organisms at any trophic level depends

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Assertion (A) : In a food chain members of successive higher levels are fewer in number. Reason (R ): Number of organisms at any trophic level depends

Description : Assertion (A) : In a food chain members of successive higher levels are fewer in number. Reason (R ): Number of organisms at any trophic level depends

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How many trophic levels can monkeys occupy in a food chain?

Description : How many trophic levels can monkeys occupy in a food chain?

Last Answer : Monkeys can only occupy one which is the secondary consumer

Match the trophic levels with their correct species examples in grassland ecosystem. (A) Fourth trophic level (i) Crow (B) Second trophic level (ii) Vulture (C) First trophic level (iii) Rabbit (D) Third trophic level (iv) Grass Select the correct option. (A) (B) (C) (D) (a) (ii) (iii) (iv) (i) (b) (iii) (ii) (i) (iv) (c) (iv) (iii) (ii) (i) (d) (i) (ii) (iii) (iv)

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Last Answer : (a) (ii) (iii) (iv) (i)

If 575250 calories of energy are available at the first trophic level calculate the number of calories available to the second third fourth trophic levels?

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Last Answer : 2nd lvl - 57,5253rd lvl- 5,752.54th lvl- 575.25

A 17-year-old patient involved in an automobile accident is paralyzed with multiple peripheral extremity injuries. Nutritional support is instituted with a transnasal feeding catheter. Which of the following statement(s) is/are true concerning the patient’s management? a. Feeding into the stomach results in stimulation of the biliary/pancreatic axis which is probably trophic for small bowel b. Gastric secretions will dilute the feedings increasing the risk of diarrhea c. The major risk in this patient is tracheobronchial aspiration d. Placement of the feeding catheter through the pylorus into the first portion of the duodenum reduces the risk of regurgitation and aspiration

Description : A 17-year-old patient involved in an automobile accident is paralyzed with multiple peripheral extremity injuries. Nutritional support is instituted with a transnasal feeding catheter. Which of the ... pylorus into the first portion of the duodenum reduces the risk of regurgitation and aspiration

Last Answer : Answer: a, c, d The use of transnasal feeding catheters for intragastric feeding or for duodenal intubation are popular adjuncts for providing nutritional support by the enteral route. The ... the fourth portion of the duodenum reduces the risk of regurgitation and aspiration of feeding formulas

A 16-year-old boy suffers a mid-gut volvulus with massive loss of small intestine. Which of the following statement(s) is/are true concerning his nutritional requirements and management? a. If at least 18 inches of residual small intestine survives, the patient may tolerate some form of enteral nutrition b. A nutritional regimen consisting of supplemental glutamine, growth hormone, and a modified high carbohydrate, low fat diet may be beneficial in this patient c. The regimen described above may decrease the cost of care d. TPN needs will increase after discontinuation of growth hormone

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Last Answer : Answer: a, b, c Prior to the availability of TPN, most patients developing short bowel syndrome from either surgery or catastrophic event died. In selected patients, however, with ... the growth hormone did not increase TPN needs in patients once they had undergone successful gut rehabilitation

Which of the following statement(s) is/are true concerning ischemia reperfusion injury? a. During ischemia, ATP degradation results in increased plasma and intracellular levels of hypoxanthine and xanthene b. Oxygen free radicals such as the superoxide radical are involved in the expression of the proinflammatory phenotype of endothelial cells, macrophages and neutrophils c. The intracellular adhesion molecule-1 (ICAN-1) contributes to injury and disruption of the endothelial lining, with extensive capillary leak and resultant interstitial edema d. Animal models have demonstrated that passive immunization with antibodies to neutrophil adhesive complex lessen the ischemic/reperfusion microvascular injury

Description : Which of the following statement(s) is/are true concerning ischemia reperfusion injury? a. During ischemia, ATP degradation results in increased plasma and intracellular levels of ... immunization with antibodies to neutrophil adhesive complex lessen the ischemic/reperfusion microvascular injury

Last Answer : Answer: a, b, c, d During the ischemia and hypoperfusion phase, degradation of ATP stores essential to maintain cell integrity and significant loss of diffusible ... either the neutrophil adhesive complex or the endothelial selectins dramatically lessens ischemia/reperfusion microvascular injury

According to 1998 Census the population growth rate in Pakistan was: A. 4.10% 89 B. 4.80% C. 3.45% D. 2.61%

Description : According to 1998 Census the population growth rate in Pakistan was: A. 4.10% 89 B. 4.80% C. 3.45% D. 2.61%

Last Answer : ANSWER: D

According to 1998 Census the population growth rate in Pakistan was: A. 4.10% B. 4.80% C. 3.45% D. 2.61%

Description : According to 1998 Census the population growth rate in Pakistan was: A. 4.10% B. 4.80% C. 3.45% D. 2.61%

Last Answer : ANSWER: D

Im looking for some place to get low cost eye exam as Im disabled and have a limited income and will probably need new glasses and only have medicare for insurance any help or suggestions would be greatly apperaicated.?

Description : Im looking for some place to get low cost eye exam as Im disabled and have a limited income and will probably need new glasses and only have medicare for insurance any help or suggestions would be greatly apperaicated.?

Last Answer : There are no private practices that offer the exam however there are companies that can offer you the service but it is a pretty basic eye exam

Which of the following statements concerning nickel-cadmium batteries is true? A. When mixing electrolyte always add acid to the water. B. Nickel-cadmium batteries can be charged and discharged only a limited number of times without damage to the cells. C. Nickel-cadmium batteries can be stored for a long time and still keep a full charge without additional charging. D. The electrolyte of an idle nickel-cadmium battery must be replaced monthly to maintain battery condition.

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Last Answer : Answer: C

Which of the following is least likely to be an effect of global warming? (1 ) Increased frequency of hurricanes (2) Loss of fertile delta region as for agriculture (3) Decreased rate of photosynthesis in vegetation (4) Shrinking of the polar ice regions

Description : Which of the following is least likely to be an effect of global warming? (1 ) Increased frequency of hurricanes (2) Loss of fertile delta region as for agriculture (3) Decreased rate of photosynthesis in vegetation (4) Shrinking of the polar ice regions

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Which of the following is least likely to be an effect of global warming? (1) Increased frequency of hurricanes (2) Loss of fertile delta region as for agriculture (3) Decreased rate of photosynthesis in vegetation (4) Shrinking of the polar ice regions

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Last Answer : Decreased rate of photosynthesis in vegetation

Salinization occurs when the irrigation water accumulated in the soil evaporates, leaving behind salts and minerals. What are the effects of salinization on the irrigated land? a. It greatly increases the crop production b. It may lead to crop yield loss c. It raises the water table d. It fills the air spaces in the soil with water

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Last Answer : b. It may lead to crop yield loss

Metric chains are generally available in (A) 10 m and 20 m length (B) 15 m and 20 m length (C) 20 m and 30 m length (D) 25 m and 100 m length

Description : Metric chains are generally available in (A) 10 m and 20 m length (B) 15 m and 20 m length (C) 20 m and 30 m length (D) 25 m and 100 m length

Last Answer : (C) 20 m and 30 m length

Answer: e The role of nutritional support in the cancer patient remains an important component of overall therapy. Preoperative nutritional support should be given only to those patients who do not require an emergency operation and who have severe weight loss (> 15% of pre-illness body weight) and a serum albumen < 2.9 mg%. Preoperative nutrition (enteral or parenteral) should not be given for longer than 7 to 10 days. Enteral nutrition is always the preferred route of feeding cancer patients if the GI tract is functional. There are several benefits of using the bowel lumen for nutrient delivery. The trophic effects of enteral feeding on small bowel mucosa have been well described. The integrity of the mucosal lining is maintained and it may provide an effective barrier to intraluminal

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The large surface area of a waveguide greatly reduces what type of loss that is common in two-wire and coaxial lines?

Description : The large surface area of a waveguide greatly reduces what type of loss that is common in two-wire and coaxial lines?

Last Answer : Copper loss.

Which statement is correct regarding the relationship between internal auditing and the external auditor? a. Some judgments relating to the audit of the financial statements are those of the internal auditor. b. The external audit function's objectives vary according to management's requirements. c. Certain aspects of internal auditing may be useful in determining the nature, timing and extent of external audit procedures. d. The external auditor is responsible for the audit opinion expressed, however that responsibility may be reduced by any use made of internal auditing

Description : Which statement is correct regarding the relationship between internal auditing and the external auditor? a. Some judgments relating to the audit of the financial statements are those of the ... opinion expressed, however that responsibility may be reduced by any use made of internal auditing

Last Answer : Certain aspects of internal auditing may be useful in determining the nature, timing and extent of external audit procedures.

The criteria for evaluating quantitative information vary. For example, in the audit of historical financial statements by CPA firms, the criteria are usually: a. Generally accepted auditing standards. b. Acceptable financial reporting framework c. Regulations of the Securities and Exchange Commission d. Regulations of the Bureau of Internal Revenue

Description : The criteria for evaluating quantitative information vary. For example, in the audit of historical financial statements by CPA firms, the criteria are usually: a. Generally accepted auditing ... Regulations of the Securities and Exchange Commission d. Regulations of the Bureau of Internal Revenue

Last Answer : Acceptable financial reporting framework

Interleukin-6 is recognized as the cytokine primarily responsible for the alteration in hepatic protein synthesis recognized as the acute phase response. Which of the following statement(s) is/are true concerning acute phase protein response to surgical stress? a. Glucocorticoid hormones inhibit this response b. Proteins such as albumin and transferrin which serve in serum transport are generally increased in this response c. Examples of acute phase proteins include fibrinogen and C-reactive protein d. In general, the physiologic role of acute phase proteins are to reduce the systemic effects of tissue damage

Description : Interleukin-6 is recognized as the cytokine primarily responsible for the alteration in hepatic protein synthesis recognized as the acute phase response. Which of the following statement(s) is/are true ... physiologic role of acute phase proteins are to reduce the systemic effects of tissue damage

Last Answer : Answer: c, d IL-6 is now recognized at the cytokine primarily responsible for the alteration in hepatic synthesis recognized as the acute phase response. Glucocorticoid hormones augment ... that generally inhibit the tissue destruction that is associated with the local initiation of inflammation

Will the impact of removing all the organisms in a trophic level be different for different trophic levels? Can the organisms of any trophic level be removed without causing any damage to the ecosystem? -Biology

Description : Will the impact of removing all the organisms in a trophic level be different for different trophic levels? Can the organisms of any trophic level be removed without causing any damage to the ecosystem? -Biology

Last Answer : Yes, the impact Of removing all the Organisms in a trophic level will be different for different trophic levels. It will not be possible to remove any organism in any trophic level without causing damage to the ecosystem.

Will the impact of removing all the organisms in a trophic level be different for different trophic levels ? Can the organisms of any trophic level be removed without causing any damage to the ecosystem ? -Biology

Description : Will the impact of removing all the organisms in a trophic level be different for different trophic levels ? Can the organisms of any trophic level be removed without causing any damage to the ecosystem ? -Biology

Last Answer : Yes, the impact of removing all the organisms in a trophic level will be different for different trophic levels. For example, on removing producers; herbivores would not be able to survive or ... to maintain the balance of the ecosystem the presence of organisms is necessary at each trophic level.