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301.

Question : What are non-infectious diseases ?

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SOLUTION :DISEASES that do not spread through pathogens but CAUSED DUE to malfunctioning of organ are CALLED non-infectious diseases. e.g., diabetes, cancer.
302.

Question : What are Nastic movements?

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Solution :When the MOVEMENTS are not DIRECTED towards stimuli it is CALLED Nastic movements.
303.

Question : What are macronutrients ? Why are they called macronutirents?

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SOLUTION :Nutrients that are required for the PLANTS in large AMOUNT are called macronutrients. They are nitrogen, phosphorus, potassium, CALCIUM, magnesium and sujphur.
304.

Question : What are macronutrients and why are they called macronutrients?

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Solution :1. Chemicals required by plants for their growth and development are called MACRONUTRIENTS.
2. They are nitrogen, phosphorus, POTASSIUM, calcium, magnesium, SULPHUR.
3. They are required in large quatities for the plants, therefore called macronutrients.
305.

Question : What are locomotory organs of a fish ?

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ANSWER :N/a
306.

Question : What are leucoplasts ? Give their function.

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Answer :Leucoplasts are colourless plastids found in cells that are not EXPOSED to SUNLIGHT. These STORE proteins, FATS and starch etc.
307.

Question : What are intercalary meristems? How do they differ from other meristems?

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Solution :Intercalary MERISTEM lies between the region of permananet tissues and is part of primary meristem which is DETACHED due to formation of intermittent permanent tissues. It is FOUND EITHER at the base of leaf e.g. pinus or at the base of INTERNODES e.g. grasses.
308.

Question : What are infectious diseases ?

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Solution :DISEASES that spread through pathogens or microbes from ONE PERSON to another are CALLED infectious diseases, typhoid, cholera.
309.

Question : What are? (i) compost (ii) Vermicompost (iii) Greenmanure

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SOLUTION :(i) COMPOST: Maure that is prepared from biodegradable wastes by alowingit to decompose naturally.
(ii) Vermicompost: Manure that is prepared from biodegradable wastes with the help of EARTHWORMS by allowing it to hasten the decomposition process.
(III) Green manure: Manure that is prepared by mulching and digging certain plants like sumn hemp DEEP in the soil.
310.

Question : What are (i) and (ii) respectively, in the given diagram?

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GILLS and annulus
PILEUS and gills
Stipe and annulus
Gills and pileus

Solution :Pileus and gills
311.

Question : What are fat content in milk of: (a) Murrah,(b) Surti ?

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SOLUTION :(a) 7%(B)8-12%
312.

Question : What are different types of plastids ? Mention their functions.

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Solution :( 1 ) The plastids are chromoplasts and LEUCOPLASTS.
(2) Chromoplasts contain COLOURED pigments.
(3) Leucoplasts are colourless or white.
(4) The chlorophyll containing plastid is known as chloroplast which is major photosynthesizing plastid.
(5) FUNCTIONS : Chloroplasts perform photosynthesis. Chromoplasts impart COLOUR to plant parts and also perform photosynthesis to some EXTENT. Leucoplasts store starch, oil and protein granules within them.
313.

Question : What are cultivated as a source of pearls?

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PEARLS spots
Mussels
Mullets
Oysters.

314.

Question : What are concentrates? Why should they be given to cattle?

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Solution :Concentrates are low in fibre and CONTAIN high level of carbohydrates, protein and other nutrients.A variety of raw material such as cholam(jowar),kambu (pearl millet), ragi (finger millet),rice barn, wheat bran,COTTON seed cake, mustard cake,linseed cake, groundnut cake, mango seed, neem cake and yellu(sesame) cake can be used to make CONCENTRATE FEED.The concentrates are fed ratio at the time of milking.This helps in .let down. of milk.The daily average feed ratio of a milking cow is:
(i) 15 - 25 kg of ROUGHAGE (dry grass and green fodder)
(ii) 4-5 kg of grain mixture.
(iii)100 - 150 litres of water
For a cow that gives above 2.5 kg milk yield per day,1 kg of concentrate feed should be given for every additional milk yield.
315.

Question : What are congenital diseases ?

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Solution :DUE to some genetic DISORDERS. there are some diseases PRESENT RIGHT from birth, such diseases are called congenital diseases.
316.

Question : What are communicable diseases ? Write its one example. How do they spread ?

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Solution :(1) DISEASES that spread from one patient to ANOTHER healthy person are called communicable diseases.
(2) They are infectious diseases.
(3) Pneumonia, typhoid, cough and cold, AIDS are all communicable diseases.
(4) They spread through AIR, water, physical contact or through vectors.
317.

Question : What are chromosomes ? List their two functions.

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Solution :Chromosomes are thread-like structures usually PRESENT in the nucleus and become visible only during CELL division. They are composed of DNA and Proteins.
(i) Chromosomes contain hereditary INFORMATION of the cell.
(ii) DNA of chromosomes ALSO controls all the activites of the cell.
318.

Question : What are chromosomes ?

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Answer :CHROMOSOMES are thread-like structures usually PRESENT in the nucleus and BECOME visible only during CELL divison. These contain hereditary information of the cell.
319.

Question : What are biogeochemical cycles ? Name the gas that is incorporated into life forms through photosynthesis.

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Solution :The transfer of energy and MATTER between the biotic COMPONENTS of the biosphere is called biogeochemical cycle. The gas that is incorporated into LIFE FORMS through photosynthesis in carbondoxdie .
320.

Question : What are antibiotics? Give one example of antibiotic.

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Solution :Antibiotics are DRUGS that block the BIOCHEMICAL pathways of bacteria CAUSING ERADICATION of bacteria. EXAMPLE: Penicillin.
321.

Question : Whale belongs to class.........

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SOLUTION :MAMMALIA
322.

Question : Well developed root is an adaptation of hydrophytes.

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SOLUTION :Correct STATEMENT: Well developed ROOT is an adaptation of XEROPHYTES.
323.

Question : We should not eat food items beyond the expiry date .

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SOLUTION :TOXINS are PRODUCED by BACTERIA (or ) by the ENZYMES .
324.

Question : Water vascular system is found in .....................

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hydra
earth wonn
starfish
ascaris

Answer :C
325.

Question : Water vapours deposit on the inner wall of a glass jar when a potted plant is covered with the glass jar. Name the mechanism responsible for it.

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SOLUTION :TRANSPIRATION
326.

Question : Water splits into…………... & ……………..in the light reaction,

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ANSWER :HYDROGEN & OXYGEN
327.

Question : Water is eliminated from the body in the fom of.... & ...

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ANSWER :SWEET and URINE
328.

Question : Water cycle is an essential component of proteins, DNA and chlorophyll.

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Solution :Correct statement: Nitrogen cycle is an essential COMPONENT of proteins, DNA and CHLOROPHYLL
329.

Question : Vitamins are required in large quantities for normal functioning of the body.

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SOLUTION :CORRECT Statement : Vitamins are REQUIRED in SMALL quantities for NORMAL functioning of the body.
330.

Question : Vitamin D is called as ……………… vitamins as it can be synthesised by the body from the rays of the sunlight.

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SOLUTION :CALCIFEROL
331.

Question : Vitamin C is a water soluble Vitamin.

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ANSWER :1
332.

Question : Visit a weed infested field in the month of July or August and make a list of the weeds and insect pests in the field.

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Solution :STUDENTS should visit a FARM on their own or with the help of their teachers or patents.
1. Some of the common weeds are as follows:
Different grasses ACT as unwanted weeds in the farm. These are crabgrass, Carrot grass or Parthernium. Buckhorn Plantain. Field Bindweed (Wild Morning Glory), Lamb.s Quarters, Chickweed, Dandelion.
2. Common insect pests in the farm are as follows: Lepidopterous fruit borers are most common. Other important species inlcude varioius leaf and flower-eating caterpillars and beetles, bark borers, scales, leaf miltes, fruit suckingbugs,fruit piercing moths and fruit FLIES.
333.

Question : Visit a local poultry farm. Observe types of breeds and note the type of ration, housing and lighting facilities give to them. Identity the growers, layers and broilers.

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SOLUTION :STUDENTS are EXPECTED to PERFORM this ACTIVITY on their own.
334.

Question : Visit a livestock farm and note the following: 1. Number of cattle and number of different breeds. 2.The amount of daily milk production from the different breeds.

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SOLUTION :STUDENTS are EXPECTED to PERFORM this ACTIVITY on their own.
335.

Question : Visit a nearby crop field and collect information regarding techniques of removal of weeds and chemical control of insect pests.

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ANSWER :N/a
336.

Question : Visit a fish farmin fish breeding season and note the following: 1. Varieties of fish in the ponds 2.Types of ponds. 3. feed ingredients being used in the farm 4. Find out what the production capacity of ther farm is.

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SOLUTION :STUDENTS are EXPECTED to PERFORM this ACTIVITY on their own.
337.

Question : Visit a fish farm during the breeding season near your locality and collect information.

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SOLUTION :Students can PERFORM this ACTIVITY under the guidance of the CLASS TEACHER.
338.

Question : Visit a fish farm in fish breeding season and study types of ponds, various of fish in the ponds, feed ingredients, production capacity and common problems faced by the fish farm owners.

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ANSWER :N/a
339.

Question : Viral diseases.

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ANSWER :CHICKENPOX, INFLUENZA.
340.

Question : Villi are covered with …………..

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ANSWER :SINGLE LAYER of CELLS
341.

Question : Vessels are found In collenchyma

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SOLUTION :Correct statement: VESSELS are found in XYLEM.
342.

Question : Very briefly describe the following : (i) Lysosomes are autophagous organelles during starvation. (ii) Membrane biogensis (iii) Oxysomes of mitochondria

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Solution :(i) During starvation, the lysosomes digest stored food CONTENTS (proteins, lipids, glycogen) and provide the necessary energy to the cells. This is called autophagy.
(II) The process by which some of the proteins and lipids, synthesized in the cell with the help of ER, are untilized in building the cell membrane is called membrane biogenesis.
(iii) Oxysomes are ATP - GENERATING assemblies present on the cristae (folds of inner membrane of MITOCHONDRIA).
343.

Question : Vermicompost is a type of soil made by .................... And microorganisms.

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SOLUTION :EARTHWORMS
344.

Question : Variety of life forms found ina particular region is called

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COMMUNITY
population
biodiversity
biota

Answer :C
345.

Question : vacuole in plant cell and Vacuole in animal cell

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SOLUTION :
346.

Question : Vaccination is very useful to children in order to protect them against infectious diseases.

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Solution :The immune system in the human BODY (as well as animal body) has a characteristic POWER of memory. Due to that, if the body comes in contact with any pathogen, the immune system in the body would keep a sharp memory of that. In the subsequent ATTACKS by the same type of pathogens on our body, the memory T-cells of the immune system would manage to resist such attacks and dispose off the infection very rapidly. This principle is made use of in vaccination. The children are GIVEN very weak or mild infection of various pathogens and the memory of these causativc pathogens is MAINTAINED in the body for long. As a result, the vaccinated children are made well protected against several infectious diseases such as tetanus. diphtheria measles, polio, hepatitis, etc.
347.

Question : Used for moving around in animals of phylum Echinodermata :

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DIGESTIVE SYSTEM
Circulatory system
Water-driven TUBE system
Nervous system

Solution :Water-driven tube system
348.

Question : Urea is a nitrogen fertilizer.

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ANSWER :1
349.

Question : Upon what do the signs and symptoms of a particular disease depend ?

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Solution :The SIGNS and symptoms of a DISEASE DEPEND on the TISSUE or organ which the MICROBE targets.
350.

Question : Unicellular fresh water organisms tend to get water through osmosis.

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ANSWER :1