Jamb Biology Past Questions For Year 2012
Question 21
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
Question 22
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
Question 23
The diseases caused by water-borne pathogens include
- A. gonorrhoea and poliomyelitis
- B. typhoid and syphilis
- C. tuberculosis and cholera
- D. typhoid and cholera
Question 24
From his study of Galapagos finches, Darwin derived his theory of evolution from
- A. comparative anatomy
- B. comparative physiology
- C. fossil remains
- D. comparative embryology
Question 25
The use and disuse of body parts and the inheritance of acquired traits were used to explain
- A. Darwin's theory
- B. Lamarck's theory
- C. genetic drift
- D. gene flow
