31. | What causes the disease ‘foot and mouth’ in animals? |
A. bacteria | |
B. fungus | |
C. protozoa | |
D. Virus |
32. | The causative agent of mosaic disease in potato is – |
A. Virus | |
B. bacteria | |
C. mildew | |
D. Algae |
33. | The branch of botany in which algae are studied is called – |
A. taxonomy | |
B. mycology | |
C. microbiology | |
D. Phycology |
34. | What is the cell wall of algae made of? |
A. chitin | |
B. Suverine | |
C. cellulose | |
D. cutin |
35. | Which symbiotic algae is found in the secretory cells of hydra? |
A. euchlorella | |
B. nostoc | |
C. ulothrix | |
D. spirogyra |
36. | The Sargasso sea got its name from – |
A. caused by fungi | |
B. due to angiosperms | |
C. due to algae | |
D. due to bryophyta |
37. | Dizziness can be prevented and treated by eating some kelp as it is rich in – |
A. Sulphur | |
B. iodine | |
C. calcium | |
D. phosphorus |
38. | From which algae is iodine obtained? |
A. ectocarpus | |
B. Laminaria | |
C. odogonium | |
D. ulothrix |
39. | Kelp is obtained from- |
A. from seaweed | |
B. from lichens | |
C. from algae | |
D. from algae |
40. | Which of the following is autotrophic? |
A. butterfly | |
B. Algae | |
C. mushroom | |
D. grasshopper |