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Hassan
1.Which of the following best describes the algae known as diatoms?
A. Cells have intricate shells of silicon dioxide with two halves
B. Cells are encased in rigid walls composed of cellulose coated with silicon
C. Cells have flagella and a light-detecting eye spot
D. Cells have intricate shells of silicon dioxide with two halves
2.Chrysolaminarin is an energy storage material characteristic of
A. chlorophyta
B. chrysophyta
C. phaeophyta
D. chlorophyta
3.Which of the following is correct?
A. All members of photolithotrophic autotrophs are also members of algae, but not all members of algae are members of photolithotrophic autotrophs
B. All members of algae are also members of photolithotrophic autotrophs, but not all members of photolithotrophic autotrophs are members of algae
C. All members of photolithotrophic autotrophs are members of algae, and all members of algae are members of photolithotrophic autotrophs
D. All members of photolithotrophic autotrophs are also members of algae, but not all members of algae are members of photolithotrophic autotrophs
4.Alcohol is produced with the help of
A. sodium chloride
B. yeast
C. nitrogen
D. sodium chloride
5.Which of the following drug is an antipyretic?
A. Insulin
B. Alcohol
C. Streptomycin
D. Insulin
6.What helps in the rise of bread or dosa dough?
A. Heat
B. Grinding
C. Growth of yeast cells
D. Heat
7.The status of algae in the aquatic food chain is
A. consumers
B. producers
C. host
D. consumers
8.The rod shaped bacteria are called
A. Bacillus
B. Coccus
C. Vibrio
D. Bacillus
9.Bacteria present in root nodules of pea
A. Coli
B. Plasmodium
C. Rhizobium
D. Coli
10. The microorganism which contains chlorophyll
A. Virus
B. Fungus
C. Algae
D. Virus
11.The disease caused by protozoa is
A. tuberculosis
B. polio
C. typhoid
D. tuberculosis
12.Which cannot fix atmospheric nitrogen in the soil?
A. Rhizobium
B. Clostridium
C. Azotobacter
D. Rhizobium
13.The disease caused by fungi is
A. measles
B. chicken pox
C. polio
D. measles
14.Which bacteria helps in settling of curd?
A. Rhizobium
B. Lactobacillus
C. Vibriocholarae
D. Rhizobium
15.Which microorganism causes AIDS?
A. A protozoa
B. A bacteria
C. A virus
D. A protozoa
16.Which of the following disease is spread due to bacteria?
A. Tuberculosis
B. Measles
C. Chicken pox
D. Tuberculosis
17.Which of the following is not used as food preservatives?
A. Salt
B. Sugar
C. Vinegar
D. Salt
18.The process by which amount of nitrogen remains the same in the atmosphere is known as
A. fermentation
B. carbon cycle
C. nitrogen cycle
D. fermentation
19. Spyrogyra is
A. An algae
B. A fungi
C. A protozoa
D. An algae
20.Microorganisms are
A. Unicellular
B. Multi-cellular
C. Both
D. Unicellular
21. Penicillium is a
A. Algae
B. Fungus
C. Bacteria
D. Algae
22. Malaria Is caused by
A. Protozoa
B. Virus
C. Algae
D. Protozoa
23. Rhizobium becteria
A. Help in digestion
B. Help in nitrogen fixation
C. Cause diseases
D. Help in digestion
24.Scientist who discovered fermentation is
A. Alexander Fleming
B. Louis Pasteur
C. John Mendal
D. Alexander Fleming
25. Water is absorbed by
A. Root cap
B. Root apex
C. Root hairs
D. Root cap
26.A root hair does not contain
A. Vacuole
B. Chloroplast
C. Cell wall
D. Vacuole
27.The outer covering of the epiphytic root is
A. Rhizophore
B. Osmophore
C. Pneumatophore
D. Rhizophore
28. Vivipary is the characteristic of
A. Mesophytes
B. Xerophytes
C. Hydrophytes
D. Mesophytes
29.Turmeric is a stem because
A. It grows parallel to the soil surface
B. It stores food material
C. It has chlorophyll
D. It grows parallel to the soil surface
30.———– plants have root pockets
A. Opuntia
B. Capparis
C. Banyan
D. Opuntia
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