Like the kidney, a dialysis machine leaves what in the blood?
A. water
B. waste
C. blood cells
D. salt
E. glucose
C. blood cells
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Support for the succession mechanism of tolerance is found in research on plant communities that shows
A. that plants release toxins that prevent other species from establishing. B. succession is random and cannot be predicted by existing species. C. climax communities never form as predicted by Clements. D. succession is determined largely by species that exist in the ground as seeds or old roots. E. competition-tolerant species colonize first.
Which of the following enzymes does NOT digest
proteins? a. trypsin b. chymotrypsin c. aminopeptidase d. pepsin e. lipase
The endosperm of an angiosperm seed is typically:a
haploid (1n). b. diploid (2n). c. triploid (3n). d. quadraploid (4n). e. pentaploid (5n
MMP is controlled of the ECM/basement membrane is _____
a. protein b. translational c. transcriptional d. DNA