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37. In Vaucheria, numerous nuclei are located mainly:
A. On the inner side of the cytoplasm
B. Inside pyrenoids
C. Outside the cell wall
D. Only at the filament tip
38. The plastids of Vaucheria are found mainly:
A. On the outer side near the cell wall
B. Inside the vacuole
C. Only around reproductive organs
D. In the center of the thallus
Transverse walls in Vaucheria appear when:
A. Photosynthesis begins
B. Reproductive organs are formed
C. Food is stored
D. The thallus enters seawater
An immotile asexual spore in Xanthophyceae is called:
A. Zoospore
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B. Aplanospore
C. Hormogonium
D. Zygospore
The Xanthophyceae cell wall may be saturated with:
A. Calcium carbonate
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B. Silica
C. Lignin
D. Suberin
Stored food in Xanthophyceae is mainly:
A. Starch
B. Oils or fats
C. Glycogen
D. Protein
Food in diatoms is stored mainly as:
A. Starch only
B. Glycogen
C. Lipids or chrysolaminarine
D. Cellulose
The two structures forming the diatom wall are called:
A. Pyrenoids
B. Frustules
C. Trichomes
D. Gametangia
The inner layer of a diatom wall is mainly composed of:
A. Cellulose
B. Silica
C. Pectin
D. Glycoprotein
Diatoms with bilateral symmetry are known as:
A. Central diatoms
B. Pennales
C. Frustules
D. Aplanospores
What type of reproduction involves the fusion of protoplasm from two different cells in fungi?
Chlorella is considered a:
A. Toxin
B. Super food
C. Fungal pathogen
D. Marine animal
