Biology Exam Past Questions and Answers | JAMB, WAEC and NECO

Biology is the study of life and living things. It can be divided into different areas that look at the structure, function, anatomy, and behavior of organisms.

• Question 531: During mammalian embryo development, large amounts of oestrogen and progesterone are produced in the Options:
  A) umbilical cord
  B) amnion
  C) placenta
  D) amniotic fluid
  Show Answer
  The correct answer is C .
• Question 532: Which of the following is not an excretory organ? Options:
  A) Lungs
  B) Kidney
  C) Leaf
  D) Large intestine
  E) Skin
  Show Answer
  The correct answer is C .
• Question 533: Mendel's second law of inheritance states that Options:
  A) alleles combine randomly
  B) alleles segregates independently
  C) alleles seperate predictably
  D) chromosomes segregates independently
  Show Answer
  The correct answer is B .
• Question 534: The primary consumer in the food chain below is ................Green plants → Grasshopper → Lizard → Snake → Hawk Options:
  A) Grass hopper
  B) green plants
  C) hawk
  D) lizard
  Show Answer
  The correct answer is A .
• Question 535: The most important adaptation of xerophytes is the ability of the protoplasm to Options:
  A) resist being damaged by loss of water
  B) store sugar and minerals in the vacuoles
  C) absorbs water and swell
  D) shrink from the cell wall
  Show Answer
  The correct answer is A .
• Question 536: Which of these statement below is not a characteristic of wind pollinated flower? Options:
  A) Stigmas are usually large and feathery
  B) Nectar is usually absent
  C) The pollen grains have rough spiny surfaces
  D) The flowers are not scented
  E) The pollen is light and smooth
  Show Answer
  The correct answer is C .
• Question 537: Soil micro-organisms are beneficial because of their involvement in Options:
  A) photosynthesis
  B) translocation
  C) cycling of nutrients
  D) respiration using soil air
  Show Answer
  The correct answer is C .
• Question 538: In woody plants, grass and water vapour are transported across the stems by the Options:
  A) xylem fibres
  B) medullary rays
  C) sieve tubes
  D) phloem fibres
  E) phloem parenchyma
  Show Answer
  The correct answer is A .
• Question 539: For pollen to be released in Crotalaria the insect must depress the Options:
  A) wing
  B) keel
  C) standard
  D) antepetalous stamen
  E) antesepalous stamen
  Show Answer
  The correct answer is B .
• Question 540: In the Burret test, some protein was mixed with sodium hydroxide solution. Which of the following chemicals should be added to the mixture for a positive results? Options:
  A) Mercurous nitrates
  B) Copper sulphate
  C) Mercuric nitrate
  D) Sodium carbonate
  E) Ammonium hydroxide
  Show Answer
  The correct answer is B .