Biology

Question 1

1Tissue culture produces plants that are

Hard

A. genetically identical to the parent B. all different C. hybrids D. always sterile

Question 2

2A crop variety bred to resist a disease mainly helps farmers by

Easy

A. increasing pests B. reducing losses and the need for chemicals C. reducing yield D. making the crop grow slower

Question 3

3Disease-resistant crop varieties help farmers to

Easy

A. avoid planting B. increase disease C. harvest less D. reduce losses and pesticide use

Question 4

4Crossing two different varieties to combine good traits is

Easy

A. hybridisation B. cloning C. inbreeding D. mutation

Question 5

5A genetically modified (GM) crop is one whose

Easy

A. DNA has been altered by genetic engineering B. seeds are coloured C. roots are cut D. leaves are sprayed

Question 6

6Crossing two different varieties to combine their good qualities is

Easy

A. grafting only B. hybridisation (cross-breeding) C. pruning D. irrigation

Question 7

7Selecting the best animals as parents for the next generation is

Easy

A. selective breeding B. random mating C. grafting D. natural selection

Question 8

8Artificial insemination in cattle helps to

Easy

A. increase disease B. stop breeding C. reduce milk D. spread genes of superior bulls

Question 9

9Polyploidy in crops such as wheat often results in

Hard

A. larger and more vigorous plants B. no growth C. smaller seeds D. sterile animals

Question 10

10Choosing the best animals to breed from, generation after generation, is

Easy

A. selective breeding B. mutation C. cloning only D. vaccination