Environmental Science
Condensation nuclei may be:

Salt from the ocean
Nitric acid particles
Particles of dust
All of these
Smoke from forest fires

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Environmental Science
Which among the following is related to the word Mesoderm ?

Forms blood and bone (leads to complex internal organs)
Anatomically advanced animals having all three germ layers
Binomial system of classification
No membrane-bound organelles, no peptidoglycan in cell walls, introns

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