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comparative anatomy:

compares the genomes of different organisms

compares the limbs of different organisms

molecular biology:

compares fossilized structures to living organisms

compares cells of organisms

EXPLANATION:

Comparative anatomy is the study of similarities and differences in the anatomy of different species.

Molecular Biology is the field of biology that studies the composition, structure and interactions of cellular molecules – such as nucleic acids and proteins – that carry out the biological processes essential for the cell's functions and maintenance.

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not only is it colder, it also becomes darker, less salty, and more dense.

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above