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