The natural process that produces adaptive evolutionary changes is
- A. Mutation
- B. Gene flow
- C. Genetic drift
- D. Natural selection
Use the diagram above to answer this question. The male inflorescence is labeled
- A. i
- B. ii
- C. iii
- D. iv
In the diagram, the genotypic ratio of the offspring of the cross is
- A. 1:2
- B. 1:2:1
- C. 1:1:1:1
- D. 3:1
In the diagram, which of the four offspring of the cross will be short if T the gene for tallness is dominant to t?
- A. i
- B. ii
- C. iii
- D. iv
In the diagram, the population size of species II on the 20th day is
- A. 100
- B. 200
- C. 300
- D. 400
In the diagram, if species i, ii and iii interact in a community, which of the following statement is true?
- A. the population of species ii is growing at a slow rate
- B. the population of species iii has reached its carrying capacity?
- C. the population of species I has become extinct
- D. the population of species I is always higher than species ii
In the diagram, the part labelled IV indicated that the yeast population has
- A. reached its maximum size
- B. reached senescence
- C. stopped metabolizing food
- D. started dying
In the diagram, the part labelled I represents the
- A. stationary phase
- B. lag phase
- C. log phase
- D. steady phase
In the diagram, the illustration is a typical example of a plant pollinated by
- A. wind
- B. man
- C. insects
- D. birds
Use the diagram above to answer this question. The animal represented by l is a
- A. poikilotherm
- B. homoiotherm
- C. carnivore
- D. herbivore
Use the diagram above to answer this question. From the graph above, it can be appropriately deduced that?
- A. the body temperature in ll varies with that in l
- B. the body temperature in l is independent of external temperature
- C. l and ll maintain constant body temperature
- D. external temperatures affect the body temperature of l and ll
Use the diagram above to answer this question.Water reabsorption takes place in
- A. ll and lll
- B. lll and lV
- C. l and IV
- D. l and lll
Use the diagram above to answer this question.The vessel that carries blood from l to ll is the
- A. pulmonary artery
- B. pulmonary vein
- C. carotid artery
- D. jugular vein
Use the diagram above to answer this question.The type of reproduction illustrated in IV is
- A. sexual
- B. conjugation
- C. binary fission
- D. budding
Use the diagram above to answer this question. Which of the organisms is characterised by the possession of a chitinous exoskeleton?
- A. l
- B. ll
- C. lll
- D. lV
Which of the following is a major cause of variation among organisms?
- A. Inbreeding
- B. Backcrossing
- C. Sexual reproduction
- D. Gene dominance
Which of the following is the most advanced evolutionary development in plants?
- A. possession of unicellular structures
- B. development of flowers
- C. dispersal of spores
- D. development of secondary thickening
The ability of a chameleon to change its colour is an adaptive feature for
- A. attraction
- B. defence
- C. display
- D. attack
A major adaptive feature of endoparasites is the
- A. loss of the organ of movement
- B. presence of claws
- C. loss of the central nervous system
- D. presence of piercing mouthparts
Genetically modified food products have not become universally accepted because
- A. they are not tasty as others produced by conventional means
- B. they are usually costlier than others produced by conventional means
- C. their effects on human consumers is not yet fully understood
- D. the technology can be applied only in developed countries
The Rhesus factor of blood was first identified in a category of
- A. monkeys
- B. human females
- C. human males
- D. chimpanzees