Chief function of phloem is conduction of: (a) Food (b) Minerals (c) Water (d) Air

Chief function of phloem is conduction of: (a) Food (b) Minerals (c) Water (d) Air
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What tissue present in leaves of Pinus conducts food and water laterally? (a) Transfusion tissue (b) Phloem (c) Xylem (d) Medullary rays

Description : What tissue present in leaves of Pinus conducts food and water laterally? (a) Transfusion tissue (b) Phloem (c) Xylem (d) Medullary rays

Last Answer : Ans. ((a))

Select the correct statement: (1) C4 pathway for. CO2 fixation were discovered by Hatch and Slack (2) CO2 is essential for photosynthesis (3) Addition of sodium carbonate in water retards photosynthetic rate in vallisneria (4) Phloem is the principal pathway for translocation of solutes

Description : Select the correct statement: (1) C4 pathway for. CO2 fixation were discovered by Hatch and Slack (2) CO2 is essential for photosynthesis (3) Addition of sodium carbonate in water retards photosynthetic rate in vallisneria (4) Phloem is the principal pathway for translocation of solutes

Last Answer : Ans. ((c))

Leptome is used for: (a) Phloem (c) Fibres (b) Xylem (d) Parenhyma

Description : Leptome is used for: (a) Phloem (c) Fibres (b) Xylem (d) Parenhyma

Last Answer : Ans. ((a))

Included phloem is found in

Description : Included phloem is found in

Last Answer : Included phloem is found in – Salvadora.

When many islands of phloem embedded in xylem layer due to anomalous activity of cambium are formed such phloems are known as

Description : When many islands of phloem embedded in xylem layer due to anomalous activity of cambium are formed such phloems are known as

Last Answer : When many islands of phloem embedded in xylem layer due to anomalous activity of cambium are formed such phloems are known as – Included phloem

Presence of two layers of phloem, one above xylem and another below xylem is called as

Description : Presence of two layers of phloem, one above xylem and another below xylem is called as

Last Answer : Presence of two layers of phloem, one above xylem and another below xylem is called as – Bicollateral arrangement

Which is correct about transport of conduction of substances? (a) Organic food moves up through phloem (b) Organic food moves up through xylem (c) Inorganic food moves upwardly and downwardly through xylem (d) Organic food moves upwardly and downwardly through phloem

Description : Which is correct about transport of conduction of substances? (a) Organic food moves up through phloem (b) Organic food moves up through xylem (c) Inorganic food moves upwardly and downwardly through xylem (d) Organic food moves upwardly and downwardly through phloem

Last Answer : (d) Organic food moves upwardly and downwardly through phloem

Chief air pollutant which is likely to deplete ozone layer is a) Sulphur dioxide b) Carbon dioxide c) Carbon monoxide d) Nitrogen oxides and Fluorocarbons.

Description : Chief air pollutant which is likely to deplete ozone layer is a) Sulphur dioxide b) Carbon dioxide c) Carbon monoxide d) Nitrogen oxides and Fluorocarbons.

Last Answer : d) Nitrogen oxides and Fluorocarbons

Why tracheids are less efficient than vessels in conduction

Description : Why tracheids are less efficient than vessels in conduction

Last Answer : Ans: Tracheids do not have uniform diameter, overlapped on each other at the ends and have solid cross walls. Vessels have uniform diameter, perforated cross walls and their elements are not overlapped but arranged one above the other. 

Minerals in soil body come from a. Weathering of rocks b. Wind and water c. Rains d. Dead organic remains

Description : Minerals in soil body come from a. Weathering of rocks b. Wind and water c. Rains d. Dead organic remains

Last Answer : a. Weathering of rocks

Water conduction takes place in mosses through – (1) Xylem and Phloem (2) Xylem (3) Collenchyma (4) Parenchyma

Description : Water conduction takes place in mosses through – (1) Xylem and Phloem (2) Xylem (3) Collenchyma (4) Parenchyma

Last Answer : (4) Parenchyma Explanation: Botanically, mosses are nonvascular plants that absorb water and nutrients mainly through their leaves and harvest carbon dioxide and sunlight to create food by photosynthesis. ... They do not have a welldeveloped xylem. Their conducting tissue is made up of parenchyma.

Water conduction takes place in mosses through (1) Xylem and Phloem (2) Xylem (3) Collenchyma (4) Parenchyma

Description : Water conduction takes place in mosses through (1) Xylem and Phloem (2) Xylem (3) Collenchyma (4) Parenchyma

Last Answer : Parenchyma

Describe some asexual processes occurring in animal reproduction. What is the chief disadvantage of this form of reproduction?

Description : Describe some asexual processes occurring in animal reproduction. What is the chief disadvantage of this form of reproduction?

Last Answer : Parthenogenetic development of unfertilized eggs as a regular procedure in the production of male ants and bees and Artificial stimulation of sea urchin eggs induces cleavage. Although the egg is ... In almost all animal organisms, asexual reproduction is only a supplement to sexual reproduction.  

What vascular tissue brings water and minerals to the leaves? a) phloem (pron: flow-em) b) xylem c) cambium d) rhizomes (pron: rye-zom)

Description : What vascular tissue brings water and minerals to the leaves? a) phloem (pron: flow-em) b) xylem c) cambium d) rhizomes (pron: rye-zom)

Last Answer : ANSWER: B -- XYLEM

Minerals absorbed by root move to the leaf through (a) xylem (b) phloem (c) sieve tubes (d) none of the above.

Description : Minerals absorbed by root move to the leaf through (a) xylem (b) phloem (c) sieve tubes (d) none of the above.

Last Answer : (a) xylem

Chief function of large intestine is (a) Absorption of fat (b) Absorption of salts (c) Absorption of minerals (d) Absorption of water

Description : Chief function of large intestine is (a) Absorption of fat (b) Absorption of salts (c) Absorption of minerals (d) Absorption of water

Last Answer : (d) Absorption of water

The transfer of minerals from top soil to subsoil through soil-water is called? (1) Percolation (2) Conduction (3) Leaching (4) Transpiration

Description : The transfer of minerals from top soil to subsoil through soil-water is called? (1) Percolation (2) Conduction (3) Leaching (4) Transpiration

Last Answer : (3) Leaching Explanation: Leaching refers to the loss of water-soluble plant nutrients from the soil, due to rain and irrigation. As water from rain, flooding, or other sources seeps ... the underground water supply. Mineral nutrients lost from the soil system become unavailable for plant uptake.

The transfer of minerals from top soil to subsoil through soil-water is called? (1) Percolation (2) Conduction (3) Leaching (4) Transpiration

Description : The transfer of minerals from top soil to subsoil through soil-water is called? (1) Percolation (2) Conduction (3) Leaching (4) Transpiration

Last Answer : (3) Leaching Explanation: Leaching refers to the loss of water-soluble plant nutrients from the soil, due to rain and irrigation.

Identify the incorrect statement. (a) Heartwood does not conduct water but gives mechanical support. (b) Sapwood is involved in conduction of water and minerals from root to leaf. (c) Sapwood is the innermost secondary xylem and is lighter in colour. (d) Due to deposition of tannins, resins, oils, etc., heartwood is dark in colour.

Description : Identify the incorrect statement. (a) Heartwood does not conduct water but gives mechanical support. (b) Sapwood is involved in conduction of water and minerals from root to leaf. (c) Sapwood is the innermost ... . (d) Due to deposition of tannins, resins, oils, etc., heartwood is dark in colour.

Last Answer : (c) Sapwood is the innermost secondary xylem and is lighter in colour

The transfer of minerals from top soil to subsoil through soil-water is called? (1) Percolation (2) Conduction (3) Leaching (4) Transpiration

Description : The transfer of minerals from top soil to subsoil through soil-water is called? (1) Percolation (2) Conduction (3) Leaching (4) Transpiration

Last Answer : Leaching

Anxiety and stress are caused by a) Air pollution b) Noise pollution c) Water pollution d) Nuclear pollution

Description : Anxiety and stress are caused by a) Air pollution b) Noise pollution c) Water pollution d) Nuclear pollution

Last Answer : b) Noise pollution

Spraying of DDT produces pollution of a) Air b) Air and Water c) Air and Soil d) Air, Water and Soil.

Description : Spraying of DDT produces pollution of a) Air b) Air and Water c) Air and Soil d) Air, Water and Soil. 

Last Answer : d) Air, Water and Soil.

What are the ingredients in jam ? What is the function of the material ?

Description : What are the ingredients in jam ? What is the function of the material ?

Last Answer : : For every 100 grams of naturally ripe food there are edible jams - 60 kcal , 15.6 grams of carbohydrates , 23 grams of fat , 72 grams of meat, 63.13 grams of water , ... jam contains sufficient amount of fiber. Fibrous foods relieve constipation. Jam prevents cancer of the rectum or colon.

Which can function as carrier in active ion absorption? (a) Feradoxin (b) Plastoquinone (c) Cytochrome (d) Lecithin

Description : Which can function as carrier in active ion absorption? (a) Feradoxin (b) Plastoquinone (c) Cytochrome (d) Lecithin

Last Answer : Ans. ((d))

The abortive female flower in the male cone of Gnetum can be distinguished from the normal ovules of the female cone apart from its function by the presence of …. a) no envelops b) single envelope c) two envelopes d) several envelops.

Description : The abortive female flower in the male cone of Gnetum can be distinguished from the normal ovules of the female cone apart from its function by the presence of …. a) no envelops b) single envelope c) two envelopes d) several envelops.

Last Answer : b) single envelope

Cells of aleurone layer function for

Description : Cells of aleurone layer function for

Last Answer : Cells of aleurone layer function for – hydrolyzing the food material of seeds

Give an account on the structure and function of tRNA

Description : Give an account on the structure and function of tRNA  

Last Answer : Ans: Transfer RNA is the smallest among the RNAs. It is also known as adaptor RNA or decoding RNA or soluble RNA. It accounts for 10 - 15% of total cellular RNA. It consists of 80 - 90 ... significance. tRNA brings the aminoacids to the surface of ribosomes at the time of protein synthesis. 

Name the living mechanical tissue? What is its function?

Description : Name the living mechanical tissue? What is its function?

Last Answer : Ans: Collenchyma. It helps in providing mechanical strength in aerial parts of dicots. If green, it carries out photosynthesis. Sometimes it is meristematic and gives rise cork cambium in dicot stems at the time of secondary growth.  

What is chlorenchyma? What is its function?

Description : What is chlorenchyma? What is its function? 

Last Answer : Ans: Parenchyma with chloroplasts is called as Chlorenchyma. It carries out photosynthesis.  

What is exodermis? What is its function.

Description : What is exodermis? What is its function. 

Last Answer : Ans: Suberised peripheral region of root cortex is called as exodermis. It provides mechanical strength and prevents the leakage absorbed mineral water.  

The main function of NABARD is a) Farmers' loaning b) Agricultural research c) Refinancing to agricultural financing institutions d) Development of agriculture

Description : The main function of NABARD is a) Farmers' loaning b) Agricultural research c) Refinancing to agricultural financing institutions d) Development of agriculture

Last Answer : c) Refinancing to agricultural financing institutions 

Main function of biofertilizer is a) To increase chemical process b) To increase physiological process c) To increase biological process d) To increase photosynthesis process

Description : Main function of biofertilizer is a) To increase chemical process b) To increase physiological process c) To increase biological process d) To increase photosynthesis process 

Last Answer : c) To increase biological process 

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

Air spaces are present in (a) Hydrophytes (b) Xerophytes (c) Mesophytes (d) Al1these

Description : Air spaces are present in (a) Hydrophytes (b) Xerophytes (c) Mesophytes (d) Al1these

Last Answer : Ans. ((a))

Air pollution effects are usually found on a) Flowers b) Leaves c) Stems d) Roots.

Description : Air pollution effects are usually found on a) Flowers b) Leaves c) Stems d) Roots.

Last Answer : b) Leaves

Seed treatment is done to control— a) Soil-borne disease b) Air-borne disease c) Seed-borne disease d) None of these

Description : Seed treatment is done to control— a) Soil-borne disease b) Air-borne disease c) Seed-borne disease d) None of these

Last Answer : c) Seed-borne disease

In what process is food absorbed in the intestines of animals ?

Description : In what process is food absorbed in the intestines of animals ?

Last Answer : Food is absorbed in the intestines of animals in the process of absorption.

What are the main morphological types for food storage ?

Description : What are the main morphological types for food storage ?

Last Answer : There are 3 main types of staples for food storage.

What if the tip of the root swells with food ?

Description : What if the tip of the root swells with food ?

Last Answer : When the tip of the root is swollen by storing food, it is called kandal.

Energy transfer from one traphic level to other in a food chain is (a) 10% (b) 20% (c) 1% (d) 2%

Description : Energy transfer from one traphic level to other in a food chain is (a) 10% (b) 20% (c) 1% (d) 2%

Last Answer : Ans. ((a))

The 10% energy transfer law of food chain was given by (a) Lederberg (b) Lindmann (c) Weismann (d) Lindley

Description : The 10% energy transfer law of food chain was given by (a) Lederberg (b) Lindmann (c) Weismann (d) Lindley

Last Answer : Ans. ((b))

Cryopreservation is a technique used for a) Crystallization of food b) Food packing c) Seed saving d) Preservation of excess production of vegetables

Description : Cryopreservation is a technique used for a) Crystallization of food b) Food packing c) Seed saving d) Preservation of excess production of vegetables

Last Answer : c) Seed saving

Horticulture is the study that includes a) Fruits, vegetables and flowers b) All food crops c)Vegetable gardens and lawns near hotels only d)Some bush crops and apples

Description : Horticulture is the study that includes a) Fruits, vegetables and flowers b) All food crops c)Vegetable gardens and lawns near hotels only d)Some bush crops and apples 

Last Answer : a) Fruits, vegetables and flowers

general Chief Minerals Resources What ?

Last Answer : Bangladesh Chief Minerals Resources Being Natural Gas .

Function of companion cells is (a) providing energy to sieve elements for active transport (b) providing water to phloem (c) loading of sucrose into sieve elements by passive transport (d) loading of sucrose into sieve elements.

Description : Function of companion cells is (a) providing energy to sieve elements for active transport (b) providing water to phloem (c) loading of sucrose into sieve elements by passive transport (d) loading of sucrose into sieve elements.

Last Answer : (d) loading of sucrose into sieve elements.

Function of companion cells is (a) providing energy to sieve elements for active transport (b) providing water to phloem (c) loading of sucrose into sieve elements by passive transport (d) loading of sucrose into sieve elements.

Description : Function of companion cells is (a) providing energy to sieve elements for active transport (b) providing water to phloem (c) loading of sucrose into sieve elements by passive transport (d) loading of sucrose into sieve elements.

Last Answer : (d) loading of sucrose into sieve elements.

Phloem fibres function? -Biology

Description : Phloem fibres function? -Biology

Last Answer : Bast fibre (also called phloem fibre or skin fibre) is plant fibre collected from the phloem (the "inner bark", sometimes called "skin") or bast surrounding the stem of certain dicotyledonous plants. They support the conductive cells of the phloem and provide strength to the stem.

The opening and closing of the stomatal pores is a function of the - (1) Guard cells (2) Chloroplast (3) Xylem (4) Phloem

Description : The opening and closing of the stomatal pores is a function of the - (1) Guard cells (2) Chloroplast (3) Xylem (4) Phloem

Last Answer : (1) Guard cells Explanation: The opening and closing of the pores is a function of the guard cells. They swell when water flows into them, causing the stomatal pore to open and likewise, the pore closes if the guard cells shrink.

State the function of a) sieve tubes b) sieve plate c) companion cells d) phloem fibres.

Description : State the function of a) sieve tubes b) sieve plate c) companion cells d) phloem fibres.

Last Answer : a) Sieve tubes: They play an important role in the conduction of food. b) Sieve plate: It allows the food to pass through the pores. c) Companion cells: They control the passage of food through the phloem. d) Phloem fibres: They provide tensile strength to the plant body.

The tissue that is involved in the transport of food material in plants is called: (a) parenchyma (b) phloem (c) sclerenchyma (d) xylem

Description : The tissue that is involved in the transport of food material in plants is called: (a) parenchyma (b) phloem (c) sclerenchyma (d) xylem

Last Answer : Ans:(b)