Chorionic villus sampling differs from amniocentesis in that for CVS

A) cells must first be cultured.

B) biochemical tests can be performed on the sample.

C) a karyotype is prepared directly from collected cells.

D) cells do not directly descend from the fertilized ovum.


C) a karyotype is prepared directly from collected cells.

Biology & Microbiology

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Changes in community composition and structure over time are called

A) succession. B) stratification. C) zonation. D) characterization.

Biology & Microbiology

At the pH of most bodily fluids, which functional group will lose a proton and which functional group will accept a proton?

A. sulfhydryl; carbonyl B. amino; carboxyl C. carbonyl; Hydroxyl D. carboxyl; amino E. Hydroxyl; amino

Biology & Microbiology

What does Pseudomonas aeruginosa not cause?

What will be an ideal response?

Biology & Microbiology

Flagellated Protista probably gave rise to 

A. Archaea. B. Animalia. C. Fungi. D. Plantae.

Biology & Microbiology