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

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

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Environmental Science
During the winter solstice in the Northern Hemisphere:

The noon sun is overhead at 23.5o S latitude
All of these
Astronomical winter begins in the Northern Hemisphere
At middle latitudes in the Northern Hemisphere, this marks the longest night of the year

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