According to Mendel’s first law of inheritance, segregation of genes occur when
- A. tall plants are crossbred
- B. short plants are crossbred
- C. tall plants and short plants are crossbred
- D. plants are crossbred
Use the diagram above to answer this question.
What are the genotypes of the parents if the gene for skin colour is H?
- A. Spotted Leopard HH Black Panther hh
- B. Spotted Leopard HH Black Panther Hh
- C. Spotted Leopard Hh Black Panther Hh
- D. Spotted Leopard Hh Black Panther hh
Use the diagram above to answer this question.
What are the genotypes of the parents if the gene for skin colour is H?
- A. Spotted Leopard HH Black Panther hh
- B. Spotted Leopard HH Black Panther Hh
- C. Spotted Leopard Hh Black Panther Hh
- D. Spotted Leopard Hh Black Panther hh
Use the diagram above to answer this question.
What of the following statements about the cross is correct?
- A. The gene for the spotted coat is recessive to the gen for the black coat
- B. Black coat and spotted coat are co-dominant
- C. The gene for the spotted coat is dominant over the gene for the black coat
- D. the genotype for the F1 are homozygous dominant
How many chromosomes will be in a gamete if the normal cell has four chromosomes?
- A. 2
- B. 4
- C. 6
- D. 8
A woman with blood group A gives birth to a child with blood group O. Which of the following blood groups cannot belong to the father?
- A. A
- B. B
- C. C
- D. AB
- E. O
Which of the following traits is not inheritable? Ability to
- A. taste PTC
- B. roll the tongue
- C. move the ear
- D. rool the eyeball
Which of the following statements about human blood groups is not true?
- A. A is dominant over B
- B. O is recessive
- C. B is dominant over O
- D. A and B are co-dominant
Soil erosion could be prevented by
- A. flooding a farmland
- B. cover-cropping
- C. deforestation
- D. leaving the soil bare
Which of the following resources is non-renewable?
- A. Forest reserve
- B. Mineral deposit
- C. Water
- D. Wild life
Which of the following natural resources is most readily available to all organisms?
- A. Oil
- B. Water
- C. Air
- D. Food
Oil applied to the surface of water kills the larvae of mosquitoes through
- A. dehydration
- B. poisoning
- C. starvation
- D. Suffocation
Which of the following organisms is an endo-parasite?
- A. Tapeworm
- B. Flea
- C. Tick
- D. Aphid
Which of the following organisms is an endo-parasite?
- A. Tapeworm
- B. Flea
- C. Tick
- D. Aphid
Study the diagram above and answer the question
The structure labelled I is
- A. a pitcher
- B. an onion
- C. a flower
- D. a tendril
Which of the following components make up an ecosystem?
- A. Decomposers, animals and non-living factors
- B. Living and non-living factors
- C. Plants and non-living factors
- D. Plants decomposers and non-living factors
A community reaches a climax when
- A. only pioneer organisms are present
- B. new habitats are constantly being formed
- C. there is an introduction of new plants and animal species within the community
- D. the composition and size of a community remains constant over a long period
A person suffering from obstruction of the bile duct is advised not to eat fats and oil because
- A. bile digests fats and oil
- B. fats and oil can only be absorbed whenbile is absent
- C. bile emulsifies fat and oil
- D. bile adds water to digesting food
Which of the following organs of the alimentary canal is not correctly matched with its function?
- A. Gall bladder- stores bile
- B. Liver - stores glycogen
- C. Appendix - releases enzymes
- D. Teeth = grind food
A student used the following step in testing for a non-reducing sugar.
I. added Benedict’s solution to the sugar solution
II. added dilute hydrochloric acid to the sugar solution and boiled it
III. added sodium hydroxide solution to the solution in II and boiled;
IV. added Benedict’s solution to the cooled solution in III.
The colour change to be observed in step IV is
- A. blue-black
- B. brick-red
- C. purple
- D. violet
A student used the following steps in testing for a non-reducing sugar.
I. added Benedict’s solution to the sugar solution
ll. added dilute hydrochloric acid to the sugar and boiled it;
lll. added sodium hydroxide solution to the solution in ll. and boiled;
IV. added Benedict’s solution to the cooled solution in lll.
Use this information above to answer the question.
What is the importance of step ll in the testing process? To
- A. neutralize the sugar solution
- B. soften the sugar solution
- C. change the colour of the sugar solution
- D. increase the acid content of the sugar solution