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

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 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

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 natural resources is most readily available to all organisms?

A. Oil

B. Water

C. Air

D. Food

Which of the following resources is non-renewable?

A. Forest reserve

B. Mineral deposit

C. Water

D. Wild life

Soil erosion could be prevented by

A. flooding a farmland

B. cover-cropping

C. deforestation

D. leaving the soil bare

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

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