The chief producers in the oceans are:

1. Floating hydrophytes 2. Blue green algae
3. Desmids 4. Diatoms
Subtopic:  Kingdom Protista: Chrysophytes |
 87%
From NCERT
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The cell walls of diatoms are ‘indestructible’ as they are embedded with:

1. Silica 2. Chitin
3. Calcium 4. Raphides
Subtopic:  Kingdom Protista: Chrysophytes |
 95%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch