PES SSS 3 Biology Mock 1
  • 1. Which of the following groups of animals do not possess a nervous system?
A) Cnidara
B) Porifera
C) Nematoda
D) Platyhelminthes
  • 2. The structural similarities in Paramecium and Euglena are in the ______
A) Blunt anterior and pointed posterior
B) Shape of locomotive organs
C) Presence of anterior and posterior contractile vacoule
D) Presence of micro and mega nuclei in both
  • 3. Which of the following organisms cannot exist freely on its own?
A) Chlamydomonas
B) Paramecium
C) Amoeba
D) Plasmodium
  • 4. Which of the following cell organelles is the site for the production of ATP?
A) Nucleus
B) Mitochondrion
C) Ribosome
D) Lysosome
  • 5. An example of osmosis in plants is the _____
A) Absorption of water from the soil by root
B) Loss of water vapor from the stomata
C) Translocation of food through the phloem
D) Movement of water through the xylem
  • 6. The organism that can carry out both autotrophic and heterotrophic modes of nutrition is _____
A) Eudorina
B) Chlamydomonas
C) Euglena
D) Spirogyra
  • 7. Deamination of amino acid in the liver produces
A) Urea
B) Bile
C) Glycogen
D) Blood sugar
  • 8. Which of the following types of placentation is not common amongst syncarpous pistils?
A) Axile
B) Free Central
C) Marginal
D) Parietal
  • 9. Which of the following function is associated with calcium in plants? Formation of
A) Cell membrane
B) Ribosomes
C) Proteins
D) Cell wall
  • 10. The complex energy-rich organic matter which living organisms need for life is
A) Food
B) Air
C) Mineral salts
D) Water
  • 11. The scientist who introduced binomial nomenclature in the classification of organisms was_____
A) Charles Darwin
B) Louis Pasteur
C) Carlous Linnaeus
D) John Ray
  • 12. Which of the following statements is true about arthropods
A) Metathorax bears only wings
B) Prothorax bears only legs
C) Mesothorax bears only legs
D) Prothorax bears only wings
  • 13. What level of organization is spirogyra
A) Cell
B) Tissue
C) Organ
D) System
  • 14. The streaming movement of cytoplasm within Paramecium is known as
A) Transpiration
B) Cyclosis
C) Plastids
D) Digestion
  • 15. Which of the following organelles is found only in plant cells?
A) Ribosomes
B) Lysosome
C) Plastids
D) Mitochondria
  • 16. Active transport differs from diffusion in that active transport
A) Occurs in both plant and animal tissues
B) Allows the movement of substances against concentration gradient
C) Is a very fast process
D) Take place in both dark and light reaction of photosynthesis
  • 17. The odontoid process is found on the ____
A) Thoracic vertebra
B) Sacral vertebra
C) Axis vertebra
D) Atlas vertebra
  • 18. A seedling was made to stand in a solution of red ink for three hours and a transverse section of the stem was examined under the microscope. The process being investigated was ____
A) The importance of micro elements to plants
B) Diffusion of coloured substances
C) Distribution of food in plants
D) Ascent of water through xylem
  • 19. Which of the following structures would carry out respiration?
A) Decolorized leaf
B) Germination
C) Dry leaf
D) Boiled cowpea
  • 20. Which of the following is not an excretory product of animals?
A) Oxygen
B) Sweat
C) Urea
D) Carbon dioxide
  • 21. An example of homeostasis in living organisms is _____
A) Cooling effect resulting from evaporation of water from the body surface
B) Changing of the body colour of chameleon to match the colour of the foliage on which it is resting
C) Root hairs of a plant growing towards the source of light
D) The release of phosphorus into the phloem of a plant growing in a phosphorus-deficient soil
  • 22. Which of the following structures will not be found in the nucleus of a cell?
A) Lysosome
B) Centriole
C) DNA
D) Nuclelous
  • 23. An example of organ level of organization is
A) Kidney
B) Bird
C) Spermatozoon
D) Xylem
  • 24. A structural similarity between Paramecium and Amoeba is the presence of ______
A) One gullet
B) Two contractile vacuoles
C) One food vacuole
D) Two nuclei
  • 25. The rate of diffusion of molecules between two media will be higher if _____
A) The difference in concentration of the two media is negligible
B) The difference in concentration of the two media is high
C) The difference in concentration of the two media is low
D) There is no difference in the concentration of the two media
  • 26. Underground storage stems which grow horizontally in the soil are ____
A) Bulbs
B) Corms
C) Runners
D) Rhizomes
  • 27. The ability of organisms to maintain a constant internal environment is known as ____
A) Diuresis
B) Plasmolysis
C) Homeostasis
D) Endosmosis
  • 28. An example of a process that involves osmosis is the _____
A) Reabsorption of food nutrients from the kidney into blood capillaries
B) Translocation of starch from leaves to all parts of a plant
C) Movement of digested food from ileum into blood capillaries
D) Movement of water from root hairs into cortical cell
  • 29. Growth in animals differs from that in plants because growth in
A) Plants is indefinite
B) Plants is from within
C) Plants is intercalary
D) Animals is apical
  • 30. The triscupid valve is located between the
A) Right auricle and right ventricle
B) Right auricle and the superior vena cava
C) Left auricle and left ventricle
D) Aorta and left ventricle
  • 31. Which of the following hormones is wrongly paired with its secretory organ?
A) Adrenalin and kidney
B) Oxytocin and hypothalamus
C) Insulin and pancreas
D) Oestrogen and ovary
  • 32. The eye defect caused by an uneven curvature of the cornea or lens or both is _____
A) Presbyopia
B) Hypermetropia
C) Myopia
D) Astigmatism
  • 33. Which of the following sequences is the correct evolutionary trend in organisms?
A) Liverwort---->Angiosperm--->Ferns--->Algae
B) Ferns--->Liverwort--->Angiosperm--->Algae
C) Angiosperm--->Algae--->Ferns--->Liverwort
D) Algae--->Liverwort--->Ferns--->Angiosperm
  • 34. Which of the following organisms exhibits adaptive colouration?
A) Dog
B) Mouse
C) Chameleon
D) Rabbit
  • 35. When two carriers of sickle cell anaemia produce an offspring, the probability of the offspring being a sickler is ____
A) 3/4
B) 2/3
C) 1/2
D) 1/4
  • 36. Which of the following statements about sex-linked traits is not correct
A) Females can be carriers because they can be heterozygous for the trait
B) Sex-linked traits are common in males
C) Males inherit sex-linked traits from their fathers
D) Males are never carriers since they only receive one sex chromosome
  • 37. Individuals belonging to blood group O are universal donors because ___
A) There are no antibodies in their blood plasma
B) Antigens are absent in their blood cells
C) The antigens in their blood cells are easily destroyed
D) Members of the group constitute the highest number of humans
  • 38. Which of the following traits in human is an example of physiological variation?
A) Fingerprint
B) Skin colour
C) Tongue rolling
D) Height
  • 39. An accident victim was successfully transfused with blood from the father whose blood group is AB. The blood group of the accident victim is ____
A) AB
B) B
C) A
D) O
  • 40. The use of a lighter instead of match sticks is a way of conserving ____
A) Petroleum
B) Wildlife
C) Forest
D) Water
  • 41. Natural selection arises as a result of _____
A) Gene mutation
B) Reduction in population
C) Climate change
D) Change of habitat
  • 42. Which of the following organisms exhibits division of labour?
A) Termite
B) Butterfly
C) Cockroach
D) Housefly
  • 43. A mixture of blood with antigen 'A' and blood containing antibody 'a' will
A) Facilitate dissolution of clot
B) Change the blood group
C) Lead to agglutination
D) Have no effect on blood composition
  • 44. Which of the following resources cannot be conserved?
A) Forest
B) Garbage
C) Soil
D) Water
  • 45. Hypermetropia can be corrected by the use of ____
A) Cylindrical lens
B) Concave lens
C) Convex lens
D) Bifocal lens
  • 46. Detoxification of urea takes place in the ____
A) Heart
B) Pancreas
C) Testes
D) Liver
  • 47. Radius and ulna are bones of the ____
A) Upper arm
B) Lower arm
C) Pelvic girdle
D) Pectoral girdle
  • 48. The organism belongs to the phylum _____
A) Ciliophora
B) Euglenophyta
C) Rhodophyta
D) Rhizopoda
  • 49. Which of the following organisms does not undergo incomplete metamorphosis?
A) Butterfly
B) Locust
C) Cockroach
D) Grasshopper
  • 50. Which of the following statements best explains the reasons why termites swarm at night?
A) Light destroys their wings
B) Light is not necessary for swarming
C) They can only see in the dark
D) They avoid day-flying birds
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