An ecosystem ,such as an aquarium is self-substaining if it involves the interaction between organisms , a flow of energy , and the presence of

An ecosystem ,such as an aquarium is self-substaining if it involves the interaction between organisms , a flow of energy , and the presence of
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An ecosystem ,such as an aquarium is self-substaining if it involves the interaction between ... plants C. materials cycles D. pioneer organisms
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The initiation of a humoral immune response involves a complex interaction of the antigen, cells and intercellular messengers. Which of the following statement(s) concerning the initiation of the humoral immune response is/are correct? a. Helper T lymphocytes stimulate B lymphocytes through secretion of cytokines such as interleukin 4 and 6 b. A number of cells can aid in presenting the antigen to the helper T cell including B lymphocytes and macrophages c. All antigens require coordinated efforts of the various cellular components of the immune system d. An antigen must be a living microorganism

Description : The initiation of a humoral immune response involves a complex interaction of the antigen, cells and intercellular messengers. Which of the following statement(s) concerning the initiation of the ... various cellular components of the immune system d. An antigen must be a living microorganism

Last Answer : Answer: a, b Stimulation of the immune system occurs after a variety of antigen-presenting cells (B lymphocytes, macrophages, dendritic cells, and Langerhans cells) act to engulf ... polysaccharides), most antigens require coordinated efforts of the various cellular components of the immune system

An artificial ecosystem is represented by (1) pisciculture tank (2) agricultural land (3) zoo (4) aquarium

Description : An artificial ecosystem is represented by (1) pisciculture tank (2) agricultural land (3) zoo (4) aquarium

Last Answer : (4) aquarium Explanation: An artificial ecosystem is one created by people. You can create an artificial ecosystem in an aquarium or terrarium. Nathaniel Bagshaw Ward is credited as the inventor of the terrarium, which he accidently created in 1829.

An artificial ecosystem is represented by : (1) pisciculture tank (2) agricultural land (3) zoo (4) aquarium

Description : An artificial ecosystem is represented by : (1) pisciculture tank (2) agricultural land (3) zoo (4) aquarium

Last Answer : aquarium

Which of these is an example of interaction between biotic and abiotic components of an ecosystem?

Description : Which of these is an example of interaction between biotic and abiotic components of an ecosystem?

Last Answer : Photosynthesis! (A+)

What organisms are most common in the ecosystem in order for every organism to get the energy needed to survive?

Description : What organisms are most common in the ecosystem in order for every organism to get the energy needed to survive?

Last Answer : Plants I think

What organisms are most common in the ecosystem in order for every organism to get the energy needed to survive?

Description : What organisms are most common in the ecosystem in order for every organism to get the energy needed to survive?

Last Answer : Plants I think

$ Life on earth originated by interaction of the various chemical substances in the broth of the sea. ! The first organisms were, pherhaps the chemoau

Description : $ Life on earth originated by interaction of the various chemical substances in the broth of the sea. ! The first organisms were, pherhaps the chemoau

Last Answer : $ Life on earth originated by interaction of the various chemical substances in the broth of the sea. ! The ... wrong D. If both As and R are wrong.

The study of interaction between living organisms and environment is called

Description : The study of interaction between living organisms and environment is called

Last Answer : The study of interaction between living organisms and environment is called A. Ecosystem B. Phytology C. Phytogeography D. Ecology

The interaction between two living organisms of different species which is beneficial to both but is not obligatory because they can live without each

Description : The interaction between two living organisms of different species which is beneficial to both but is not obligatory because they can live without each

Last Answer : The interaction between two living organisms of different species which is beneficial to both but ... or symbiosis C. Commensalism D. Amensalism

The living organisms can be unexceptionally distinguished from the non-living things on the basis of their ability for (a) interaction with the environment and progressive evolution (b) reproduction (c) growth and movement (d) responsiveness to touch.

Description : The living organisms can be unexceptionally distinguished from the non-living things on the basis of their ability for (a) interaction with the environment and progressive evolution (b) reproduction (c) growth and movement (d) responsiveness to touch.

Last Answer : (d) responsiveness to touch.

The tubular and dorsal nervous system of chordates is related to the cephalization in these animals and to bilateral symmetry. The presence of neural integrating centers with concentration of neurons in the brains and the spinal cord (central nervous system, CNS) allowed the increase of the interaction complexity between these animals and the environment. Receptor (afferent conduction) and efferent (motor, regulatory and behavioral reactions) functions come out more sophisticated in chordates due to the presence of more well-developed neural networks. These features have been preserved by evolution as they provide adaptive advantage to their owners.

Description : The tubular and dorsal nervous system of chordates is related to the cephalization in these animals and to bilateral symmetry. The presence of neural integrating centers with concentration of ... These features have been preserved by evolution as they provide adaptive advantage to their owners.

Last Answer : How can the tubular-dorsal nervous system in chordates be compared to the nervous pattern present in invertebrates?

How much time would it take to grow enough plants on Mars so that it would create enough oxygen for animals, organisms and humans breath without the aid of an enclosed ecosystem?

Description : How much time would it take to grow enough plants on Mars so that it would create enough oxygen for animals, organisms and humans breath without the aid of an enclosed ecosystem?

Last Answer : The bigger problem is the lack of water on Mars. Hard to grow plants with no water. Yes, there’s some water on Mars, but not anywhere near enough to grow and sustain sufficient plant life.

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.

Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?

Description : Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?

Last Answer : Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem? A. Frog B. Phytoplankton C. Fish D. Zooplankton

Assertion: Ecological pyramids cannot explain all vital functions of any ecosystem. Reason: Pyramids actually do not explain the role of organisms wor

Description : Assertion: Ecological pyramids cannot explain all vital functions of any ecosystem. Reason: Pyramids actually do not explain the role of organisms wor

Last Answer : Assertion: Ecological pyramids cannot explain all vital functions of any ecosystem. Reason: Pyramids actually ... and Reason are false, then mark (4)

How do photosynthetic plants typicallt affect the other organisms in their ecosystem?

Description : How do photosynthetic plants typicallt affect the other organisms in their ecosystem?

Last Answer : What is the answer ?

Which one of the following terms describes not only the physical space occupied by an organism, but also its functional role in the community of organisms? (1) Eco-niche (2) Ecosystem (3) Ecotone (4) Habitat

Description : Which one of the following terms describes not only the physical space occupied by an organism, but also its functional role in the community of organisms? (1) Eco-niche (2) Ecosystem (3) Ecotone (4) Habitat

Last Answer : (2) Ecosystem Explanation: An ecosystem is a community of living organisms in conjunction with the nonliving components of their environthent, interacting as a system. The nature of the organisms-the ... individuals are capable of carrying out, and the relative efficiency with which they do so.

The stability of a pond ecosystem depends on - (1) micro-organisms and fishes (2) micro-organisms and zoo planktons (3) fishes and reptiles (4) producers and consumers

Description : The stability of a pond ecosystem depends on - (1) micro-organisms and fishes (2) micro-organisms and zoo planktons (3) fishes and reptiles (4) producers and consumers

Last Answer : (4) producers and consumers

Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem? (a) Fish (b) Zooplankton (c) Frog (d) Phytoplankton

Description : Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem? (a) Fish (b) Zooplankton (c) Frog (d) Phytoplankton

Last Answer : (a) Fish

Which one of the following is a characteristic feature of cropland ecosystem? (a) Absence of weeds (b) Ecological succession (c) Absence of soil organisms (d) Least genetic diversity

Description : Which one of the following is a characteristic feature of cropland ecosystem? (a) Absence of weeds (b) Ecological succession (c) Absence of soil organisms (d) Least genetic diversity

Last Answer : (d) Least genetic diversity

Study of inter-relationships between organisms and their environment is (a) ecology (b) ecosystem (c) phytogeography (d) ethology.

Description : Study of inter-relationships between organisms and their environment is (a) ecology (b) ecosystem (c) phytogeography (d) ethology.

Last Answer : (a) ecology

hy is a food web more realistic way of portraying an ecosystem than a food chain? a) Because it shows the relation of organisms with each other in a habitat b) Because food chains use only a small sampling of organisms c) Because it doesn‘t shows the relation of organisms with each other in a habitat d) Because it compares the number of consumers to the number of micro-organisms.

Description : Why is a food web more realistic way of portraying an ecosystem than a food chain? a) Because it shows the relation of organisms with each other in a habitat b) Because food chains use only a ... other in a habitat d) Because it compares the number of consumers to the number of micro-organisms.

Last Answer : Because it shows the relation of organisms with each other in a habitat 

Which one of the following terms describes not only the physical space occupied by an organism, but also its functional role in the community of organisms ? (1) Eco-niche (2) Ecosystem (3) Ecozone (4) Habitat

Description : Which one of the following terms describes not only the physical space occupied by an organism, but also its functional role in the community of organisms ? (1) Eco-niche (2) Ecosystem (3) Ecozone (4) Habitat

Last Answer : Ecosystem

Which is the correct path of energy flow in an ecosystem?

Description : Which is the correct path of energy flow in an ecosystem?

Last Answer : Which is the correct path of energy flow in an ecosystem? A. `"Producers" to "Carnivores" to " ... " to "Producers" to "Carnivores" to "Decomposers"`

Which of the following exhibits unidirectional flow in an ecosystem? (1) Light (2) Energy (3) Water (4) Biomass

Description : Which of the following exhibits unidirectional flow in an ecosystem? (1) Light (2) Energy (3) Water (4) Biomass

Last Answer : (2) Energy Explanation: Ecosystems contain essentially two kinds of commodities: matter (nutrients) and energy. Material nutrients cycle through the biotic and abiotic parts of the ecosystem, available for ... Eventually, all of the energy that enters the ecosystem is lost in the form of heat.

Which of the following series is true about energy flow in an ecosystem? (1) Producers Decomposers Consumers (2) Decomposers Consumers Producers (3) Producers --> Consumers ----> Decomposers. (4) Consumers --> Producers Decomposers.

Description : Which of the following series is true about energy flow in an ecosystem? (1) Producers Decomposers Consumers (2) Decomposers Consumers Producers (3) Producers --> Consumers ----> Decomposers. (4) Consumers --> Producers Decomposers.

Last Answer : (3) Producers --> Consumers ----> Decomposers.

If we completely remove the decomposers from an ecosystem, its functioning will be adversely affected, because (a) mineral movement will be blocked (b) the rate of decomposition will be very high (c) energy flow will be blocked (d) herbivores will not receive solar energy.

Description : If we completely remove the decomposers from an ecosystem, its functioning will be adversely affected, because (a) mineral movement will be blocked (b) the rate of decomposition will be very high (c) energy flow will be blocked (d) herbivores will not receive solar energy.

Last Answer : (a) mineral movement will be blocked

Which one of the following is not a functional unit of an ecosystem? (a) Energy flow (b) Decomposition (c) Productivity (d) Stratification

Description : Which one of the following is not a functional unit of an ecosystem? (a) Energy flow (b) Decomposition (c) Productivity (d) Stratification

Last Answer : (d) Stratification

Which of the following exhibits unidirectional flow in an ecosystem ? (1) Light (2) Energy (3) Water (4) Biomass

Description : Which of the following exhibits unidirectional flow in an ecosystem ? (1) Light (2) Energy (3) Water (4) Biomass

Last Answer : Energy

In a terrestrial ecosystem such as forest, maximum energy is in which trophic level? (a) T3 (b) T4 (c) T1

Description : In a terrestrial ecosystem such as forest, maximum energy is in which trophic level? (a) T3 (b) T4 (c) T1

Last Answer : (c) T1

The statement that is NOT correct is (a) The breaking of complex and big molecules into simpler and smaller molecules by micro-organisms is called fermentation. (b) ****** contains high percentage of methanol. (c) Root **** does not contain alcohol. (d) Alcoholic fermentation involves the conversion of sugars into alcohol by the use of micro-organisms.

Description : The statement that is NOT correct is (a) The breaking of complex and big molecules into simpler and smaller molecules by micro-organisms is called fermentation. (b) Whisky contains high ... d) Alcoholic fermentation involves the conversion of sugars into alcohol by the use of micro-organisms.

Last Answer : Ans:(b)

The waste management technique that involves the use of micro-organisms to remove or neutralize pollutants from contaminated site is called (1) Bio sensor (2) Bio magnification (3) Bio remediation (4) Bio concentration

Description : The waste management technique that involves the use of micro-organisms to remove or neutralize pollutants from contaminated site is called (1) Bio sensor (2) Bio magnification (3) Bio remediation (4) Bio concentration

Last Answer : Bio remediation

Statement-1: Extraction of gold from its native ore involves leaching the metal wih dilute solution of NaCN in presence of air. Statement-2:This is an

Description : Statement-1: Extraction of gold from its native ore involves leaching the metal wih dilute solution of NaCN in presence of air. Statement-2:This is an

Last Answer : Statement-1: Extraction of gold from its native ore involves leaching the metal wih dilute solution of ... -1 is false but Statement -2 is true

Political unrest, budget overruns, size and complexity of the project Answer: B (8)Decision trees are best used for : 1. Determining the interaction of the amount at stake and the expected value 2. Association of the probabilities with the risk events 3. An illustration of how to see the interactions between decisions and the associated events 4. A flow chart which determines the standard deviation of the risk event

Description : Political unrest, budget overruns, size and complexity of the project  Answer: B  (8)Decision trees are best used for : 1. Determining the interaction of the amount at stake and the expected ... and the associated events  4. A flow chart which determines the standard deviation of the risk event

Last Answer : 3. An illustration of how to see the interactions between decisions and the associated events

Dean number is concerned with the (A) Fluid-particle interaction (B) Fluid flow through helical pipes (C) Power consumption in agitated vessels (D) Psychrometry

Description : Dean number is concerned with the (A) Fluid-particle interaction (B) Fluid flow through helical pipes (C) Power consumption in agitated vessels (D) Psychrometry

Last Answer : (B) Fluid flow through helical pipes

What is the term used in ecology to refer to a habitat zone such as a grassland or tundra, resulting from interaction of climate, biota (pron: bi-O-ta), and substratum?

Description : What is the term used in ecology to refer to a habitat zone such as a grassland or tundra, resulting from interaction of climate, biota (pron: bi-O-ta), and substratum?

Last Answer : ANSWER: BIOME (pron: BI-owm)

The network that involves backward links from output to the input and hidden layers is called _________ a) Self organizing maps b) Perceptrons c) Recurrent neural network d) Multi layered perceptron

Description : The network that involves backward links from output to the input and hidden layers is called _________ a) Self organizing maps b) Perceptrons c) Recurrent neural network d) Multi layered perceptron

Last Answer : c) Recurrent neural network

The drawbacks of ICT involves i) Foreign technology and culture are going heavy on our culture ii) Increased commitments to learning works iii) Learn more independently and at their own pace iv) Increase in self-directed learning and independence

Description : The drawbacks of ICT involves i) Foreign technology and culture are going heavy on our culture ii) Increased commitments to learning works iii) Learn more independently and at their own pace iv) Increase in self-directed learning and independence

Last Answer : i) Foreign technology and culture are going heavy on our culture

The network that involves backward links from output to the input and hidden layers is called as ____. a) Self organizing maps b) Perceptrons c) Recurrent neural network d) Multi layered perceptron

Description : The network that involves backward links from output to the input and hidden layers is called as ____. a) Self organizing maps b) Perceptrons c) Recurrent neural network d) Multi layered perceptron

Last Answer : c) Recurrent neural network

________________ need involves the desire to affiliate with and be accepted by others. (a) Esteem ; (b) Belongingness ; (c) Safety ; (d) Self-Actualization

Description : ________________ need involves the desire to affiliate with and be accepted by others. (a) Esteem ; (b) Belongingness ; (c) Safety ; (d) Self-Actualization 

Last Answer : (b) Belongingness ;

________________ need involves the desire to affiliate with and be accepted by others. (a) Esteem ; (b) Belongingness ; (c) Safety ; (d) Self Actualization

Description : ________________ need involves the desire to affiliate with and be accepted by others. (a) Esteem ; (b) Belongingness ; (c) Safety ; (d) Self Actualization 

Last Answer : (b) Belongingness ;

The organisms which can grow best in the presence of a low concentration of oxygen a. Aerophilic b. Microaerophilic c. Aerobic d. Anaerobic

Description : The organisms which can grow best in the presence of a low concentration of oxygen a. Aerophilic b. Microaerophilic c. Aerobic d. Anaerobic

Last Answer : Ans: B

The organisms which can grow both in presence and absence of oxygen a. Aerobes b. Anaerobes c. Faculative anaerobes d. Strict aerobes

Description : The organisms which can grow both in presence and absence of oxygen a. Aerobes b. Anaerobes c. Faculative anaerobes d. Strict aerobes

Last Answer : Ans: A

Organisms characterized by the presence of a notochord are called

Description : Organisms characterized by the presence of a notochord are called

Last Answer : chordates.

Lagoons used for purification of polluted water (A) Are large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds (B) Use micro-organisms/bacteria in presence of dissolved oxygen (C) Gives an excellent final effluent (with 3 to 4 lagoons arranged in series) having suspended solid < 1 mg/litre and BOD = 3.8 mg/litre (D) All (A), (B) & (C)

Description : Lagoons used for purification of polluted water (A) Are large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds (B) Use micro-organisms/bacteria in presence of dissolved oxygen (C) Gives an ... 1 mg/litre and BOD = 3.8 mg/litre (D) All (A), (B) & (C)

Last Answer : (D) All (A), (B) & (C)

Growth of __________ is promoted by the presence of manganese in water. (A) Files (B) Algae (C) Micro-organisms (D) Mosquitoes

Description : Growth of __________ is promoted by the presence of manganese in water. (A) Files (B) Algae (C) Micro-organisms (D) Mosquitoes

Last Answer : (C) Micro-organisms

Metronidazole is selectively active against anaerobic organisms because: A. Aerobes have an active transport mechanism to pump it out of their cell B. Only anaerobes reduce it to generate the reactive nitro radical C. It is rapidly inactivated in the presence of oxygen D. It binds to DNA of anaerobes with high affinity

Description : Metronidazole is selectively active against anaerobic organisms because: A. Aerobes have an active transport mechanism to pump it out of their cell B. Only anaerobes reduce it to generate the reactive ... inactivated in the presence of oxygen D. It binds to DNA of anaerobes with high affinity

Last Answer : B. Only anaerobes reduce it to generate the reactive nitro radical

Can Arduino be used for building a smart aquarium?

Description : Can Arduino be used for building a smart aquarium?

Last Answer : Yes, Arduino can be used for building a smart aquarium by using sensors to measure water temperature, pH, and other parameters, and by using actuators to control the lighting, water flow, and other parameters of the aquarium.