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Biology 2012 JAMB Past Questions

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31
Which of the following is true in blood transfusion?
  • A. person of blood group AB can donate blood only to another person of blood group AB
  • B. persons of blood groups A and B can donate or receive blood from each other
  • C. A person of blood group AB acn receive blood only from persons of blood group A or B
  • D. A person of blood group O can donate only to a person of blood group O
View Answer & Discuss (4) JAMB 2012
32
A yellow maize is planted and all the fruits obtained are of yellow seeds. When they are croos-bred, yellow seeds and white seeds are obtained in a ratio 3:1 . The yellow seed is said to be
  • A. non-heritable
  • B. sex-linked
  • C. a recessive trait
  • D. a dominant trait
View Answer & Discuss JAMB 2012
33
When a colour-blind man marries a carrier woman. What is the probability of their offspring being colour blind?
  • A. 25%
  • B. 50%
  • C. 75%
  • D. 100%
View Answer & Discuss (3) JAMB 2012
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
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34
The correct base pairing for DNA is
  • A. adenine → thymine and guanine → cytosine
  • B. adenine → guanine and thymine → cytosine
  • C. adenine → cytosine and guanine → thymine
  • D. adenine → adenine and cytosine → cytosine
View Answer & Discuss JAMB 2012
35

The short thick beak in birds is an adaptation for

  • A. crushing seeds
  • B. sucking nectar
  • C. tearing flash
  • D. straining mud
View Answer & Discuss (1) JAMB 2012
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208