Benthic organisms are affected the most by
(a) light reaching the forest floor
(b) surface turbulence of water
(c) sediment characteristics of aquatic ecosystems
(d) water-holding capacity of soil

1 Answer

Answer :

c) sediment characteristics of aquatic ecosystems

Related questions

Description : Which is the reason for highest biomass in aquatic ecosystem? (a) Nano plankton, blue green algae and green algae (b) Sea grass and slime moulds (c) Benthic and brown algae (d) Diatoms

Last Answer : (c) Benthic and brown algae

Description : The main cause of meandering is (A) Presence of an excessive bed slope in the river (B) Degradation (C) The extra turbulence generated by the excess of river sediment during floods (D) None of the above

Last Answer : Answer: Option C

Description : What are benthic organisms? -Biology

Last Answer : answer:

Description : Which of the following are artificial aquatic ecosystems?

Last Answer : Which of the following are artificial aquatic ecosystems? A. Large dams and reservoirs B. Lakes and canals C. Aquarium and pond D. All of these

Description : What role does sunlight play in aquatic ecosystems?

Last Answer : Feel Free to Answer

Description : What is the general term for organisms that live in the soil and fallen leaves on the forest floor?

Last Answer : Organisms that live in the soil and fallen leaves aredecomposers.

Description : Arrange the following ecosystems in increasing order of their mean NPP (tons/ha/year). (A) Tropical deciduous forest (B) Temperate coniferous forest (

Last Answer : Arrange the following ecosystems in increasing order of their mean NPP (tons/ha/year). (A) Tropical deciduous forest (B) ... b` D. `b lt d lt a lt c`

Description : How can the Amazon rain forest improve health of the planet and ecosystems?

Last Answer : Need answer

Description : Volumetric efficiency is affected by (A) Turbulence velocity and temperature of intake manifold (B) Efficiency of exhaust stroke (C) Valve timing overlap (D) All the above

Last Answer : (D) All the above

Description : In a reservoir the average volume of sediment deposition is 0.15 million cubic per year. If the dead storage and total capacity of the reservoir are 8 million cubic metres and 36 million cubic metres respectively, (A) The ... reducing after 60 years (C) Both (a) and (b) (D) Neither (a) nor (b)

Last Answer : (C) Both (a) and (b)

Description : If average volume of sediment deposits is one-tenth million cubic metres per year in a reservoir of total capacity 10 million cubic metres, the dead storage will be filled up, in (A) 10 years (B) 15 years (C) 20 years (D) 25 years

Last Answer : (D) 25 years

Description : Pick up the correct statement from the following:  (A) The ratio of the total sediment deposited in the reservoir to the total sediment flowing in  the river, is called trap efficiency  ( ... less  (C) Large capacity reservoirs on small rivers generally silt more  (D) All the above

Last Answer : (D) All the above

Description : Pick up the correct statement from the following:  (A) Large solids carried along the river bed, is known as bed load  (B) The fine sediment deposits are generally near the face of ... ) Deposition of sediment in the reservoir, reduces the capacity of the reservoir  (D) All the above 

Last Answer : (D) All the above 

Description : Which soil has the lowest water holding capacity ?

Last Answer : : Desert soils have the lowest water holding capacity.

Description : Soil particles determine its (a) texture (b) field capacity (c) water holding capacity (d) soil flora.

Last Answer : (a) texture

Description : Bio-fertilisers are cheaper, renewable and pollution free. They improve the __________ of the soil. (A) Nutrient supply (B) Texture (C) Water holding capacity (D) All (A), (B) and (C)

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

Description : Ploughing is done to : A. Improve soil aeration C. Increase water holding capacity B. Destroy weeds D. All are correct

Last Answer : All are correct

Description : Which one of the following statement not true for organic manure ? a) It enhances water holding capacity of soil . b) It has a balance of all plant nutrients c) It provides humus to soil. d) It improves texture of soil.

Last Answer : b) It has a balance of all plant nutrients

Description : Which one of the change may occur due to desertification? a) decrease in atmospheric temperature b) increase in water holding capacity of soil c) increased chances of flood d)conversion of fertile land into a desert

Last Answer : d)conversion of fertile land into a desert

Description : What kind of water is found in the benthic zone of a lake?

Last Answer : Cold and dense

Description : A lake or pond community is also known as a: w) pelagic community (pron: pe-laj-ick) x) benthic community (pron: ben-thick) y) lentic community (pron: len-tick) z) lotic community (pron: lot-ick)

Last Answer : ANSWER: Y -- LENTIC COMMUNITY

Description : An open-ocean community is also called a: w) pelagic community (pron: pe-laj-ick) x) benthic community (pron: ben-thik) y) lentic community (pron: len-tick) z) lotic community (pron: lot-ick)

Last Answer : ANSWER: W -- PELAGIC COMMUNITY

Description : For generation of biogas, the materials commonly used are — (1) Animal wastes (2) Crop residues (3) Aquatic plants (4) Forest residues

Last Answer : (1) Animal wastes Explanation: Biogas typically refers to a gas produced by breakdown of organic matter in the absence of oxygen. Organic waste such as dead plant and animal material, animal feces ... materials such as biomass, manure, sewage, municipal waste, green waste, plant material, and crops.

Description : For generation of biogas, the materials commonly used are (1) Animal wastes (2) Crop residues (3) Aquatic plants (4) Forest residues

Last Answer : Animal wastes

Description : (a) Draw a diagram of human respiratory system and label the following: (i) part where air is filtered by fine hair and mucus (ii) part which terminates in balloon - like structures (iii) ... (b) Why is the rate of breathing in aquatic organisms much faster than in terrestrial organisms? -Biology

Last Answer : (a) (b) Quantity of dissolved oxygen is fairly low in water as compared to the amount of oxygen in air. Aquatic organisms therefore have to breath faster than terrestrial organisms to absorb the required amount of oxygen from the water.

Description : $ Anarobic respiration occurs in the aquatic organisms. ! Aquatic organisms are never autotrophic.

Last Answer : $ Anarobic respiration occurs in the aquatic organisms. ! Aquatic organisms are never autotrophic. A. If both ... D. If both As and R are wrong.

Description : $ Viruses are at a border line position between living and non living. ! Phytoplanktons are those living organisms which are aquatic.

Last Answer : $ Viruses are at a border line position between living and non living. ! Phytoplanktons are those living ... wrong D. If both As and R are wrong.

Description : The optimum dissolved oxygen level (in mg/litre) required for survival of aquatic organisms is - (1) 4 - 6 (2) 2 - 4 (3) 8 - 10 (4) 12 - 16

Last Answer : (1) 4 - 6 Explanation: Oxygen is one of several dissolved gases important to aquatic systems. Dissolved oxygen is necessary to maintain aerobic conditions in surface waters and is ... approach saturation - that concentration which is in equilibrium with the partial pressure of atmospheric oxygen.

Description : For the aquatic organisms, the source of food is – (1) Phytoplankton (2) Sea Weed (3) Aqua plankton (4) Zooplankton

Last Answer : (4) Zooplankton Explanation: Zooplankton are a type of heterotrophic plankton that range from microscopic organisms to large species, such as jellyfish.

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.

Description : A lake which is rich in organic waste may result in (a) increased population of aquatic organisms due  to minerals (b) drying of the lake due to algal bloom (c) increased population of fish due to lots of  nutrients (d) mortality of fish due to lack of oxygen.

Last Answer : (d) mortality of fish due to lack of oxygen.

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

Description : A lake which is rich in organic waste may result in (a) increased population of aquatic organisms due to minerals (b) drying of the lake due to algal bloom (c) increased population of fish due to lots of nutrients (d) mortality of fish due to lack of oxygen.

Last Answer : (d) mortality of fish due to lack of oxygen.

Description : Match the organisms in column-I with habitats in column-II. Column-I Column-II A. Halophiles (i) Hot springs B. Thermoacidophiles (ii) Aquatic environment C. Methanogens (iii)Guts of ruminants D. Cyanobacteria (iv) Salty area Select the correct ... , C-(ii), D-(i) (d) A-(ii), B-(iv), C-(iii), D-(i)

Last Answer : (a) A-(iv), B-(i), C-(iii), D-(ii)

Description : The optimum dissolved oxygen level (in mg/litre) required for survival of aquatic organisms is : (1) 4 – 6 (2) 2 – 4 (3) 8 – 10 (4) 12 – 16

Last Answer :  4 – 6

Description : What is the difference between sediment and soil?

Last Answer : Sediment is rock and sand only. Soil includes decayed materialand plant roots and fungus and other things that makes it richerthan plain sediment.

Description : The main function of baffles provided in a shell and tube heat exchanger is to (A) Facilitate the cleaning of outer tube surface (B) Enhance turbulence (C) Hold the tubes in position (D) All 'a', 'b' & 'c'

Last Answer : (B) Enhance turbulence

Description : A flight is to depart from an airport with runway 09 and 27. Surface wind is 270/05; an  inversion is reported at 300 feet with turbulence and wind shear. The wind just above the  ... throttle during the passage through the inversion  d. Depart runway 27 with as steep an ascent as possible

Last Answer : b. Depart on runway 09 with a tailwind

Description : Which of the following conditions is worst with regard to wake vortex turbulence? a. Lights winds near the surface b. Strong winds near the surface c. Marked vertical wind shear d. Marked atmospheric turbulence near the ground

Last Answer : a. Lights winds near the surface

Description : A flight is to depart from an airport with runway 09 and 27. Surface wind is 270/05; an inversion is reported at 300 feet with turbulence and wind shear. The wind just above the ... throttle during the passage through the inversion d. Depart runway 27 with as steep an ascent as possible

Last Answer : b. Depart on runway 09 with a tailwind

Description : The rate at which light energy is converted into chemical energy of organic molecules is the ecosystem’s (a) net secondary productivity (b) gross primary productivity (c) net primary productivity (d) gross secondary productivity.

Last Answer : (b) gross primary productivity

Description : Holding 25-N bag of sugar 1 meter above the floor requires how many joules of work?

Last Answer : 24

Description : Holding 25-N bag of sugar 1 meter above the floor requires how many joules of work?

Last Answer : 24

Description : How is mountain soil (forest soil) formed ? Mention any four characteristics of forest soil. -SST 10th

Last Answer : Formation: The soils are formed due to mechanical weathering caused by snow, rain, temperature variation, etc. Characteristics/Features : (i) These soils are heterogeneous in nature, and their character changes ... content in the snow covered areas. It is fertile in the lower parts of the valleys.

Description : Describe the characteristics of forest (mountain) soil.

Last Answer : a. These are the soils found in the mountainous region of India like Meghalaya, Arunachel Pradesh and Jammu and Kashmir. b. These soils are characterized by deposition of organic materials ... snow covered areas of Himalayas these soils experience denudation and are acidic with low humus content.

Description : How would the economy be affected if everyone holding stock neither bought nor sold shares for, say, a week?

Last Answer : it would stay flat and sidewise. people would be going long term- then when it broke- there’d be lots of money to make

Description : What percent of earth's radiation is lost before reaching earth's surface?

Last Answer : 25% is absorbed by clouds.25% is reflected by clouds.So 50% of the sun's radiation is lost before it reaches earth's surface.See the diagram link below.

Description : Do Volcanic necks and dikes form when magma cools and hardens into rock after reaching the surface?

Last Answer : No, these features form when magma cools into rocks BEFOREreaching the surface.

Description : Do Volcanic necks and dikes form when magma cools and hardens into rock after reaching the surface?

Last Answer : No, these features form when magma cools into rocks BEFOREreaching the surface.

Description : 13. Water holding capacity of land depends on ? (a) Soil composition (b) Grain size (c) Aggregation of grain (d) All of these

Last Answer : (d) All of these