In the diagram, which of the following statement is true of the interaction
- A. P aurelia is better adapted for obtaining food than P caudatum
- B. P caudatum is better adapted for obtaining food than P. aurelia
- C. both organisms cannot coexist
- D. both organisms cannot reproduce
The type of interaction shown is referred to as
- A. interspecific competition
- B. intraspecific competition
- C. mutualism
- D. cooperation
The largest number of cassava plants has an approximate height of
- A. 1.4m
- B. 1.6m
- C. 1.8m
- D. 2.0m
Use the diagram above to answer this question.
The graph illustrates
- A. the highest frequency for height of 2 metres
- B. a discontinuously varying character
- C. a continuously varying character
- D. total yield in a cassava farm
Use the diagram above to answer this question.
The function of the part labelled lll is to
- A. produce egg cells
- B. protect sperms during fertilization
- C. secrete hormones during coitus
- D. protect the developing embryo
Use the diagram above to answer this question.
The developing embryo is usually contained in the part labelled
- A. IV
- B. III
- C. II
- D. I
Use the diagram above to answer this question. Arrows represent directional movement materials.
The arrow labelled ll represents the
- A. release of oxygen
- B. intake of carbon (IV) oxide
- C. movement of photosynthates
- D. movement of nutrients
Use the diagram above to answer this question.Arrows represent directional movement materials.
Transportation in the xylem is represented by
- A. I
- B. II
- C. III
- D. IV
Use the diagram above to answer this question.
The part labelled IV is the
- A. mitochondrion
- B. cell wall
- C. endoplasmic reticulum
- D. nucleus
Use the diagram above to answer this question.
The organelle responsible for heredity is labelled
- A. l
- B. ll
- C. lll
- D. IV
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
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
The significance of a very large number of termites involved in nuptial swarming is to
- A. provide birds with plenty of food
- B. ensure their perpetuation despite predatory pressure
- C. search for a favourable place to breed
- D. ensure that every individual gets a mate
The basking of Agama lizards in the sun is to
- A. change the colour of their body
- B. raise their body temperature to become active
- C. fight to defend their territories
- D. attract the female for courtship
The short thick beak in birds is an adaptation for
- A. crushing seeds
- B. sucking nectar
- C. tearing flash
- D. straining mud
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
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%
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
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
The diseases caused by water-borne pathogens include
- A. gonorrhoea and poliomyelitis
- B. typhoid and syphilis
- C. tuberculosis and cholera
- D. typhoid and cholera
An indigenous method of renewing and maintaining soil fertility is by
- A. clearing farms by burning
- B. planting one crop type
- C. adding inorganic fertilizers yearly
- D. crop rotation and shifting cultivation