Biology MCQs for Class 9 and More

biology mcqs for class 9 and more
biology mcqs for class 9 and more

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Biology MCQs for Class 9 and More

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Biology MCQs for Class 9 and More

1001. Exceptionally the positive hydrostatic pressure generated by root pressure is about___________?

A. 600 Kpa
B. 800 Kpa
C. 1000 Kpa
D. 900 Kpa

1002. Cuticular transpiration is _________ of total transpiration?

A. 6-8%
B. 5-7%
C. 7-9%
D. 4-6%

1003. All plants do not possess___________?

A. Lenticels
B. Cuticle
C. Stomata
D. All of these

1004. Lenticular transpiration is ___________ of total transpiration?

A. 2-3%
B. 1-3%
C. 1-4%
D. 1-2%

1005. Introduction of vaccine within the body to produce immunity is an example of____________?

A. Artificially induced active immunity
B. Naturally induced active immunity
C. Artificially induced passive immunity
D. Naturally induced passive immunity

1006. The flow of lymph is maintained by__________?

A. Movement of viscera
B. Breathing movements
C. Valves
D. All of these

1007. It is the discharge of blood from blood vessels?

A. Myocardial infarction
B. Cerebral infarction
C. Cerebral Hemorrhage
D. Thromboembolism

1008. All of the follwing are blood clots except:___________?

A. Thrombus
B. Embolus
C. Atheroma
D. Hematoma

1009. It is the measure of force with which blood pushes up against the walls of blood vessels.

A. Stroke volume
B. Cardiac output
C. Blood pressure
D. Blood flow

1010. Which of the following have thickest walls?

A. Arteries
B. Veins
C. Capillaries
D. None of these

1011. QRS complex represents____________?

A. Atrial systole
B. Ventricular systole
C. Atrial diastole
D. Ventricular diastole

1012. Tricuspid valve is present_____________?

A. Between right atrium and right ventricle
B. Between left atrium and left ventricle
C. At base of pulmonary artery
D. At base of aorta

1013. Cooley’s anemia is another name used for___________?

A. Leucemia
B. Thalassaemia
C. Sickle cell anemia
D. None of these

1014. Which of the following are proteins in nature?

A. Antibodies.
B. Interferons
C. Antitoxins
D. All of these

1015. Aerating openings formed in the bark through which exchange of gases takes place and water is lost in the form of vapours are___________?

A. Hydathods
B. Stomata
C. Lenticels
D. None of these

1016. Lenticels look like__________?

A. A big pore
B. Stoma
C. Sponge
D. Cars or small protusions

1017. Transport of minerals from soil to epidermal cells of roots via carrier protein molcules along their concentration gradient is called___________?

A. Diffusion.
B. Facilitated diffusion.
C. Passive transport.
D. Active transport.

1018. Pulling upward of water and dissolved minerals towards the leaves through the xylem tissue is called__________?

A. Transpiration pull
B. Root pressure
C. Ascent of sap.
D. All of these

1019. A pressure created by active secretion of salts and other solutes from other cells into xylem sap is called___________?

A. Transpiration pull
B. Root pressure
C. Osmotic pressure.
D. None of these

1020. Stomatal transpiration is __________ of total transpiration

A. 90%
B. 91%
C. 93%
D. 95%

1021. ___________ function as multisensory hydraulic valve?

A. Lenticels
B. Guard cells
C. Hydathods
D. All of these

1022. _________ give rise to macrophages, which destroy larger particles by phagocytosis.

A. Nautrophils
B. Basophila
C. Monocyte
D. Lymphocyte

1023. 95% of the cytoplasm of red blood cells is the___________?

A. Antibodies
B. Hemoglobin
C. Enzymes
D. Proteins

1024. Open circulatory system can contain_________?

A. Red Blood Cells
B. White Blood Cells
C. Haemoglobin
D. All of these

1025. Pressure flow theory was proposed by_________?

A. H-Van Mohl
B. Dixon
C. Vander wall.
D. Earnst Munch

1026. The opening and closing of stomata is directly controlled by the___________?

A. Temperature
B. pH
C. Light
D. None of these

1027. There are _________ hypothesis which may explain opening and closing of stomata?

A. One
B. Two
C. Three
D. Four

1028. Low level of CO2 favours _________ of the stomata.

A. Opening
B. Closure
C. Both of these
D. None of these

1029. Symbionts which help plants in uptake of phosphorous and trace metals such as zinc and copper.

A. Bacteria
B. Viruses
C. Fungi
D. Cyanobacteria

1030. Addition of salts and other solutes from other cells into xylem sap, __________ the water potential of the xylem sap

A. Increases.
B. Lowers.
C. Doesn’t effect.
D. Maintains.

101. Single circuit heart is found in_________?

A. Fishes
B. Amphibians
C. Reptiles
D. Mammals

1032. Stomata open due to _________ of K+ into the guard cells from the surrounding epidermis

A. Diffusion
B. Active transport
C. Osmosis
D. All of these

1033. Which of the following is true about hearts of earthworm?

A. There are 5-7 pairs of heart.
B. They are present between 1-7th segments.
C. They are present lateral to the oesophagus.
D. They pump blood from ventral to dorsal vessel.

1034. It has been estimated that in a normal person plasma constitutes about ________ by volume of blood.

A. 35%
B. 45%
C. 55%
D. 75%

1035. Brown fat present in certain mammals is specialized in___________?

A. Providing insulation in cold environment.
B. Providing insulation in hot environment
C. Rapid heat production.
D. Controlling heat production.

1036. Panting is a representative of which mechanism?

A. Pigmentation.
B. Respiration.
C. Evaporative cooling.
D. Excretion.

1037. Formation of heat shock proteins in plants results in___________?

A. Elevation of temperature in cold conditions.
B. Embracing the enzymes and other proteins and prevent their denaturation.
C. Change the chemical nature of other proteins thus making them heat resistant.
D. Help in evaporative cooling.

1038. Fishes, most of the invertebrates and amphibians are examples of ________ animals?

A. Endotherms
B. Ectotherms
C. Heterotherms
D. Homeotherms

1039. The mechanism of regulation, generally between organism and its environment, of solutes and the gain and the loss of water is called________?

A. Homeostasis
B. Hemostasis
C. Osmoregualtion
D. Thermoregulation

1040. Which of the following represents osmoregulatory steps taken by hydrophytes?

A. Increases transpiration by increasing the surface area of the leave.
B. Small and thick leaves to decrease the surface area proportional to the volume of the leave.
C. Stomata closing in sufficient supply, and opening in restricted supply of water.
D. None of these

1041. Most of the marine invertebrates are__________?

A. Osmoconformers
B. Osmoregulators
C. Both depend upon the concentration of sea water
D. None of these

1042. Which of the following marine fishes are considered direct descendents of fresh water ancestors?

A. Hagfish
B. Jelly Fish
C. Star Fish
D. Bony fishes

1043. Which excretory product in produced in plants during autotrophic mode of life?

A. CO2
B. H2O
C. O2
D. Both A and B

1044. Which of the following statement about conifers is correct?

A. Stored excretory products in vacuoles, at a concentration that leads to crystal formation.
B. Accumulate waste in leaves, which fall in autumn.
C. Production of black wood in the center.
D. Excrete some of the waste materials directly into soil, occasionally using them as a chemical weapon against other competing plants.

1045. Purine and pyrimidine metabolism results in production of____________?

A. Creatinine
B. Trimethyamine oxide
C. Xanthine
D. None of these

1046. Amount of water required to excrete 1gN of Urea is_________?

A. 1 ml
B. 50 ml
C. 100 ml
D. 150 ml

1047. Each ach nephridium of earthworm opens to the exterior by__________?

A. Nephrostome
B. Nephridiopore
C. Flame cell
D. Anus

1048. The main nitrogenous waste formed in the body of earthworm is/are___________?

A. Ammonia
B. Urea
C. Uric acid
D. Trimethylamine oxide

1049. Which of the following excretory structure is associated with gut of the organism?

A. Protonephridium
B. Metanephridium
C. Malpighian tubules
D. Nephrons

1050. Which of the following nephrons play important role in production of concentrated urine?

A. Crotical
B. Medullary
C. Juxtramedullary
D. None of these

1051. Which of the following kidney stones are most common?

A. Calcium oxalate
B. Calcium phosphate
C. Uric acid
D. All of these

1052. Which of the following treatment will be administered first in a newly diagnosed renal failure patient?

A. Renal transplant
B. Peritoneal Dialysis
C. Lithotripsy
D. Hemodialysis

1053. In plants, which of the following is a waste product produced both during photosynthesis and respiration?

A. CO2
B. H2O
C. O2
D. Both A and B

1054. In animals excess of nitrogen is excreted primarily in form of___________?

A. Creatinine
B. Trimethyamine oxide
C. Pyrimidine
D. Ammonia

1055. Hydra has no specialized excretory system because:

A. It does not produce waste material
B. Due to absence of mesoderm
C. The whole body cells are in contact with water
D. It has pseudocoelom.

1056. The distal blind end of the malpighian tubules bathes freely in____________?

A. Digestive tract
B. Intestines
C. Haemocoel
D. Coelom

1057. Which of the following is a sentimentally arranged excretory system?

A. Protonephridium
B. Metanephridium
C. Malpighian tubules
D. Nephrons

1058. Excessive lactic acid is converted into __________ by liver?

A. Glucose
B. Fructose
C. Sucrose
D. Glycogen

1059. Each human kidney receives _______% of total cardiac out put?

A. 10%
B. 20%
C. 30%
D. 40%

1060. On which of the following site the posterior pituitary hormone acts predominantly?

A. Proximal convoluted tubule
B. Descending limb of loop of Henle
C. Ascending limb of loop of Henle
D. Collecting tubules

1061. Animals that produce metabolic heat at low level and also absorb heat from the surroundings are called__________?

A. Endotherms
B. Ectotherms
C. Heterotherms
D. Homeotherms

1062. Blubber a thick layer of fat is present in___________?

A. Fresh water mammals
B. Terrestrial mammals
C. Marine Mammals
D. Flying mammals

1063. Production of pyrogens is a __________ phenomenon?

A. Protective
B. Destructive
C. Constructive
D. Aggressive

1064. Thermostat of human body is present in__________?

A. Fore brain
B. Hind Brain
C. Thalamus
D. Hypothalamus

1065. Which of the following structure in plant’s body is called excretophores?

A. Stem
B. Leaves
C. Flowers
D. Roots

1066. The characteristic which enable animals to tolerate dehydration is called__________?

A. Osmoconformation
B. Osmoregulaton
C. Anhydrobiosis
D. Anhydrosis

1067. Which of the following fishes excrete large volume of diluted urine?

A. Bony Marine fishes
B. Fresh water fishes
C. Both depending upon the surrounding water
D. None of these

1068. Rose is an example of____________?

A. Hydrophytes
B. Mesophytes
C. Xerophytes
D. Halophytes

1069. In a hot summer after noon, if your body’s Homeostatic machinery keep your internal temperature quite lower than that of external than this is an example of____________?

A. Positive feed back
B. Negative feed back
C. Feed back
D. Osmoregulation

1070. Marine fish can keep their internal environment hypertonic with respect to the surrounding salty water by retaining.

A. Excessive urea which will increase their internal solute concentration and prevent body shrinkage in hypertonic environment
B. Trimethyl alanine
C. Ammonia
D. Trimethylamine oxide

1071. Terrestrial animals like kangaroo rat survive even without drinking water since__________?

A. They don’t require water for their metabolic process
B. They can retain excessive water in their body during raining season.
C. They feed on carbohydrate rich seeds which can provide them with metabolic water
D. They are anhydrobiotic organisms

1072. Aquatic animals excrete nitrogenous waste commonly in the form of_____________?

A. Ammonia
B. Urea
C. Uric acid
D. Trimethylamine oxide

1073. Protonephridia are present in____________?

A. Round worms
B. Flateworm
C. Tape worms
D. Segmented worms

1074. Which of the following constituent is/are maximum in the filtrate that leaves proximal convoluted tubules?

A. Glucose
B. Amino acids
C. Nitrogenous waste
D. All of these

1075. Which of the following mechanism explains development of anemia in Renal failure?

A. Failure of bone marrow is accompanied with renal failure.
B. Destruction of RBC results from accumulated urea in the blood.
C. Chronicity of the disease is respobsible for anemia
D. Failure of proper RBC synthesis, due to lack of chemical stimulation.

1076. Which adaptation is acquired by plants of cooler areas to prevent lipid crystal formation in cell membrane?

A. Change in membrane protein composition.
B. Change in the solute composition of the cell membrane which prevents crystallization.
C. Increase in proportion of unsaturated fatty acids.
D. Development of heat shock proteins.

1077. Which of the following statement about Homeostasis is incorrect?

A. There is a definite control system that regulates the homeostatic activities
B. Homeostatic mechanisms keep the internal environment fixed despite of wide changes in external environment
C. Because of this the fluctuations of internal environment are of extremely narrow range as compared to that of external environment
D. All are correct

1078. Which of the following fish drink large amount of sea water and excrete concentrated urine resulting in maximum salt excretion and minimal water loss?

A. Hagfish
B. Fresh water fishes
C. Bony fishes
D. None of these

1079. Normal body temperature in mamals like human beings is____________?

A. 26 – 28°C
B. 36 – 38°C
C. 46 – 48°C
D. 56 – 58°C

1080. In osmosis water molecules move from area of _____________ through semipermeable memberane?

A. Higher solute concentration to lower solute concentration
B. Lower solute concentration to higher solute concentration
C. Lower solvent concentration to higher solvent concentration
D. All of these

1081. Which of the following is most toxic?

A. Ammonia
B. Urea
C. Uric acid
D. Trimethylamine oxide

1082. In Urea cycle __________ ammonia molecules combine with 1 CO2 molecule to form 1 molecule of urea.

A. 1
B. 2
C. 3
D. 4

1083. Which of the vascular channels are related to Juxtramedullary nephrous only?

A. Afferent and efferent arterioles
B. Peritubualr capillaries
C. Vasa nervosa
D. Vasa recta

1084. A stone measuring 0.4 cm, blocking the outlet of renal pelvis resulting in mild to moderate tract obstruction. Which of the following technique will be opted to remove this stone?

A. Kidney surgery
B. Burring a hole and removing the stone manually (nephrolithotomy)
C. Extracorporeal Shock wave lithotripsy
D. None of these

1085. Bats & humming birds belong to___________?

A. Endotherms
B. Ectotherms
C. Heterotherms
D. Homeotherms

1086. Thick, waxy & leathery cuticle around leaves is present in___________?

A. Hydrophytes
B. Mesophytes
C. Xerophytes
D. Halophytes

1087. Which of the following animal excrete nitrogenous waste mainly as uric acid?

A. Hydra
B. Planaria.
C. Humans
D. Birds.

1088. Which of the following openings have cilia?

A. Nephrostome
B. Nephridiopore
C. Both of these
D. None of these

1089. Malphighian tubules absorb waste materials and salts from__________?

A. Blood
B. Lymph
C. Gut
D. Hemolymph

1090. Which of the following filtrate contains excessive amount of amino acids, glucose, and salts?

A. Glomerular filtrate
B. Filtrate passing through ascending limb
C. Filtrate passing through distal conveluted tubule
D. Filtrate passing through collecting tubules

1091. Mammalian kidney, under restricted water supply can conserve water by over ________ % reabsorption of glomerular filtrate

A. 80.50%
B. 90.50%
C. 95.50%
D. 99.50%

1092. The nephridia of earthworm open into the coelom by_________?

A. Nephrostome
B. Nephridiopore
C. Flame cell
D. Anus

1093. Nephrostome in earthworm opens in____________?

A. External space
B. Internal Body cavity
C. In gut
D. In Bladder

1094. Scolidon or dog fish belong to the group of fishes called__________?

A. Cartilaginous fishes
B. Bony fishes
C. Running fishes
D. Jawless fishes

1095. They are considered to be the most primitive and are surely the first of the vertebrates?

A. Frogs
B. Reptiles
C. Amphibinas
D. Jawless fishes

1096. Sub- phylum vertebrate is also known as__________?

A. Pisces
B. Craniata
C. Aves
D. Amphibia

1097. The phylum chrordata comprise about how many species?

A. 25,000
B. 50,000
C. 100,000
D. 10,00,000

1098. It is stiff rod of special cells surrounded by connecive tissue present in the mid -dorsal region and appears in the embryos of all chordates

A. Placenta
B. Notochord
C. Cranianta
D. Ligule

1099. Snails belong to__________?

A. Cephalopodsxc
B. Gastropods
C. Bivalves
D. Athropods

1100. In mouth cavity of many molluscs there is a rasping tongue like structure_________provided with many horny teeth. A. Ligule
B. Radula
C. Mantle
D. Muscle

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