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