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What has been one of the most important results of the dramatic increase in international trade volume over the past 60 years?

Although trade deficits may have some benefits to a country, in the long run, they tend to _______.

Rows of closely spaced membrane-spanning proteins which form a leak-proof watertight barrier between adjacent cells are ______.

The very elaborate, fluffy carbohydrate / protein complexes which add bulk to the animal extracellular matrix and resist compression are ______.

    In the pathway shown, at which step(s) is the signal amplified?

Explain the following term. An explanation contains more than writing out an abbreviation.  Digital Twin.

Cell lines A and B both survive in tissue culture containing serum but do not proliferate. Factor F is known to stimulate proliferation in cell line A. Cell line A produces a receptor protein (R) that cell line B does not produce. To test the role of receptor R, you introduce this receptor protein into cell line B, using recombinant DNA techniques. You then test all your various cell lines in the presence of serum for their response to factor F, with the results summarized in the table. Which of the following CANNOT be concluded from your results above?

The very strong “super spot welds” which link together the tough keratin filaments in adjacent cells are ______.

Put these in the correct evolutionary order. Bacteria, plant, lichen, fungus, green algae.

There are many types of connective tissue, but the feature they all share in common is _____